2017
10
2
0
0
1

Investigation of Shape Functions Role on the Meshfree Method Application in Soft Tissue Elastography
http://jsme.iaukhsh.ac.ir/article_531133.html
1
In current study, The Meshfree method based on weakform formulation coupled with the ultrasound imaging technique is developed. This problem consists in computing the deformation of an elastic nonhomogenous phantom by numerical methods (both Meshfree and Finite Element) and converge their results to the measured deformation by the ultrasound. The shape functions of Meshfree are approximated by the Moving Least Square (MLS) method. The effect of Shape functions on the Meshfree results are analyzed and discussed with the several simulations in 2D domain.
0

5
12
Hamed
Ajabi Naeeni
Hamed
Ajabi Naeeni
Islamic Azad University, Khomeinishahr Branch
Iran
ajabinaeeni@iaukhsh.ac.ir
Mohammad
Haghpanahi
Mohammad
Haghpanahi
Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Iran
Hamid
Behnam
Hamid
Behnam
Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran
Iran
behnam@iust.ac.ir
Hadi
Pirali
Hadi
Pirali
Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Iran
hadi.pirali@yahoo.com
Elastography
MeshFree
Soft Tissue Phantom
[[1] Bamber J, Cosgrove D, Dietrich CF, Fromageau J, Bojunga J, Calliada F, Cantisani V, Correas JM, D’onofrio M, Drakonaki EE, Fink M. EFSUMB guidelines and recommendations on the clinical use of ultrasound elastography. Part 1: Basic principles and technology. Ultraschall in der MedizinEuropean Journal of Ultrasound. 2013 Apr;34(02):16984.##[2] Glaser KJ, Manduca A, Ehman RL. Review of MR elastography applications and recent developments. Journal of Magnetic Resonance Imaging. 2012 Oct 1;36(4):75774.##[3] Manduca A, Oliphant TE, Dresner MA, Mahowald JL, Kruse SA, Amromin E, Felmlee JP, Greenleaf JF, Ehman RL. Magnetic resonance elastography: noninvasive mapping of tissue elasticity. Medical image analysis. 2001 Dec 31;5(4):23754.##[4] Asbach P, Klatt D, Hamhaber U, Braun J, Somasundaram R, Hamm B, Sack I. Assessment of liver viscoelasticity using multifrequency MR elastography. Magnetic Resonance in Medicine. 2008 Aug 1;60(2):3739.##[5] Sporea I, Gilja OH, Bota S, Sirli R, Popescu A. Liver elastographyan update. Medical ultrasonography. 2013 Dec 1;15(4):304.##[6] Naeeni HA, Haghpanahi M. FE Modeling of Living Human Brain Using Multifrequency Magnetic Resonance Elastography. InApplied Mechanics and Materials 2011 (Vol. 66, pp. 384389). Trans Tech Publications.##[7] Chen Q, Ringleb SI, Manduca A, Ehman RL, An KN. A finite element model for analyzing shear wave propagation observed in magnetic resonance elastography. Journal of Biomechanics. 2005 Nov 30;38(11):2198203.##[8] Liu GR, Gu YT. An introduction to meshfree methods and their programming. Springer Science & Business Media; 2005 Dec 5.##[9] Zhu T, Atluri SN. A modified collocation method and a penalty formulation for enforcing the essential boundary conditions in the element free Galerkin method. Computational Mechanics. 1998 Apr 1;21(3):21122.##[10] Hall TJ, Bilgen M, Insana MF, Krouskop TA. Phantom materials for elastography. ieee transactions on ultrasonics, ferroelectrics, and frequency control. 1997 Nov;44(6):135565.##[11] Sinkus R, Tanter M, Xydeas T, Catheline S, Bercoff J, Fink M. Viscoelastic shear properties of in vivo breast lesions measured by MR elastography. Magnetic resonance imaging. 2005 Feb 28;23(2):15965. ##]
1
Stress intensity factor at the holeedge cracks tips in a finite plate
Stress intensity factor at the holeedge cracks tips in a finite plate
http://jsme.iaukhsh.ac.ir/article_532853.html
1
In the current research work, the problem of fracture mechanics in a plate with a central hole under tensile loading is studied. The stress intensity factors are calculated for a finite plate containing two symmetrical holeedge cracks. The problem is solved by two different methods, namely the finite element method and the FRANC software analysis. At first the finite element method is used and by writing a program in MATLAB software the stress intensity factors at the crack tips are calculated. The same problem is then reanalyzed with the Franc software and the results are compared. The effects of various factors such as the hole diameter, crack length and crack angle have been investigated on stress intensity factors. The results show that for small crack lengths, the effect of cracks length is more than that of the hole diameter on variation of normalized stress intensity factors, while it is the opposite for large crack lengths, the effect of hole diameter is more than that of the cracks length on variation of normalized stress intensity factors.
0
In the current research work, the problem of fracture mechanics in a plate with a central hole under tensile loading is studied. The stress intensity factors are calculated for a finite plate containing two symmetrical holeedge cracks. The problem is solved by two different methods, namely the finite element method and the FRANC software analysis. At first the finite element method is used and by writing a program in MATLAB software the stress intensity factors at the crack tips are calculated. The same problem is then reanalyzed with the Franc software and the results are compared. The effects of various factors such as the hole diameter, crack length and crack angle have been investigated on stress intensity factors. The results show that for small crack lengths, the effect of cracks length is more than that of the hole diameter on variation of normalized stress intensity factors, while it is the opposite for large crack lengths, the effect of hole diameter is more than that of the cracks length on variation of normalized stress intensity factors.
13
20
Mohammad Rahim
Torshizian
Mohammad Rahim
Torshizian
Islamic Azad University, Mashhad Branch
Iran
torshizian@mshdiau.ac.ir
Stress intensity factor
holeedge cracks
Finite Element
Franc software
[[1] X. Yan, “A numerical analysis of cracks emanating from an elliptical hole in 2D plate,” The J. of Mech. Res. Vol. 25, pp. 142153, 2005.##[2] A. Cirello, F. Furgiuele, C. Mletta, A. Pasta, “Numerical simulation and experimental measurements of the stress intensity in perforated plates,” J. of Eng. Frac. Mech. Res. Vol. 75, pp. 43834393, 2008.##[3] T.N. Chakherlou, B. Abazadeh, J. Vogwell, “The effect of bolt clamping force on the fracture strength and the stress intensity factor of a plate containing a fastener hole with edge cracks,” J. of Eng. Failare Analysis Res. Vol. 16, pp. 242253, 2009.##[4] J. Zhao, L. Xie, J. Liu, Q. Zhao, “A method for stress intensity factor clacuation of infinite plate containing multiple holeedge craks,” Int. J. of Fatigue Res. Vol. 35, pp. 29, 2012.##[5] M.R. Torshizian, M. Molazem, “Stress intensity factor in single cracked gears made of steel and functionally graded material in vehicle gearbox,” J. of Eng. Res. Vol. 29, pp. 4756, 2013.##[6] M.R. Torshizian, M.H. Kargarnovin, “The mixed mode fracture mechanics analysis of an embedded arbitrary oriented crack in two dimensional functionally graded material plate,” Arch. Appl. Mech., vol. 84, pp. 625637, 2014.##[7] R. Evans, A. Clarke, R. Gravina, M. Heller, R. Stewart, “Improved stress intensity factor for selected configurations in cracked plates,” J. of Eng. Frac. Mech. Res. Vol. 127, pp. 296312, 2014.##[8] M.R. Torshizian, “Analysis of mode III fraction in functionally graded plate with linearly varying properties,” J. of Solid Mech., vol. 6 pp. 299309 , 2014.##[9] M.R. Torshizian, H. Andarzjoo,“The mixed mode fracture mechanics in a hole plate bonded with two dissimilar plane,” J. Solid Mech. in Engine., vol. 95 pp. 271380, 2017.##[10] N.E. Dowling, “Mechanical Behavior of Materials engineering methods for deformation fracture and fatigue,” Prentice Hall. Englewood Cliffs 2014.##[11] S. Mohammadi, “Extended Finite Element Method for Fracture Analysis of Structures,” Blackwell Publishing 2008. ##]
1
Evaluation of two lattice Boltzmann methods for fluid flow simulation in a stirred tank
Evaluation of two lattice Boltzmann methods for fluid flow simulation in a stirred tank
http://jsme.iaukhsh.ac.ir/article_532854.html
1
In the present study, commonly used weakly compressible lattice Boltzmann method and Guo incompressible lattice Boltzmann method have been used to simulate fluid flow in a stirred tank. For this purpose a 3D Parallel code has been developed in the framework of the lattice Boltzmann method. This program has been used for simulation of flow at different geometries such as 2D channel fluid flow and 3D stirred tank fluid flow. It has been shown that in addition to elimination of compressibility error, the Guo incompressible method eliminates mass leakage error from the fluid flow simulations although its implementation is as easy as the weakly compressible Lattice Boltzmann method. By the way, comparison between results of the two methods shows that differences in local flow quantities are negligible in both methods; however, for overall flow quantities, the results of Guo incompressible method are more accurate than those of weakly compressible method.
0
In the present study, commonly used weakly compressible lattice Boltzmann method and Guo incompressible lattice Boltzmann method have been used to simulate fluid flow in a stirred tank. For this purpose a 3D Parallel code has been developed in the framework of the lattice Boltzmann method. This program has been used for simulation of flow at different geometries such as 2D channel fluid flow and 3D stirred tank fluid flow. It has been shown that in addition to elimination of compressibility error, the Guo incompressible method eliminates mass leakage error from the fluid flow simulations although its implementation is as easy as the weakly compressible Lattice Boltzmann method. By the way, comparison between results of the two methods shows that differences in local flow quantities are negligible in both methods; however, for overall flow quantities, the results of Guo incompressible method are more accurate than those of weakly compressible method.
21
34
SeyedMehdi
Naghavi
SeyedMehdi
Naghavi
Department of mechanical engineering, Islamic Azad university, Isfahan,Iran
Iran
naghavi@iaukhsh.ac.ir
lattice boltzmann method
Stirred tank
Turbulent flow
Guo Incompressible lattice Boltzmann method
parallel programming
[[1] Eggels, J. G. M., "Direct and largeeddy simulation of turbulent fluid flow using the latticeboltzmann scheme," International journal of heat and fluid flow, vol. 17, pp. 307323, 1996.##[2] Musavi, S. H. and Ashrafizaadeh, M., "On the simulation of porous media flow using a new meshless lattice boltzmann method," in Mathematical and computational approaches in advancing modern science and engineering: Springer, pp. 469480, 2016.##[3] Musavi, S. H. and Ashrafizaadeh, M., "A meshfree lattice boltzmann solver for flows in complex geometries," International journal of heat and fluid flow, vol. 59, pp. 1019, 2016.##[4] Oulaid, O. and Zhang, J., "On the origin of numerical errors in the bounceback boundary treatment of the lattice boltzmann method: A remedy for artificial boundary slip and mass leakage," European Journal of MechanicsB/Fluids, vol. 53, pp. 1123, 2015.##[5] Musavi, S. H. and Ashrafizaadeh, M., "Meshless lattice boltzmann method for the simulation of fluid flows," Physical Review E, vol. 91, p. 023310, 2015.##[6] Khazaeli, R., Mortazavi, S., and Ashrafizaadeh, M., "Application of an immersed boundary treatment in simulation of natural convection problems with complex geometry via the lattice boltzmann method," Journal of Applied Fluid Mechanics, vol. 8, pp. 309321, 2015.##[7] Khazaeli, R., Ashrafizaadeh, M., and Mortazavi, S., "A ghost fluid approach for thermal lattice boltzmann method in dealing with heat flux boundary condition in thermal problems with complex geometries," Journal of Applied Fluid Mechanics, vol. 8, pp. 439452, 2015.##[8] Zadehgol, A., Ashrafizaadeh, M., and Musavi, S. H., "A nodal discontinuous galerkin lattice boltzmann method for fluid flow problems," Computers & Fluids, vol. 105, pp. 5865, 2014.##[9] Zadehgol, A. and Ashrafizaadeh, M., "Introducing a new kinetic model which admits an htheorem for simulating the nearly incompressible fluid flows," Journal of Computational Physics, vol. 274, pp. 803825, 2014.##[10] Xiong, Q., MadadiKandjani, E., and Lorenzini, G., "A lbm dem solver for fast discrete particle simulation of particle fluid flows," Continuum Mechanics and Thermodynamics, vol. 26, pp. 907917, 2014.##[11] Walther, E., Bennacer, R., and Desa, C., "Lattice boltzmann method applied to diffusion in restructured heterogeneous media," Defect and Diffusion Forum, pp. 237242, 2014.##[12] Viggen, E. M., "The lattice boltzmann method: Fundamentals and acoustics," 2014.##[13] Rahmati, A. R. and Niazi, S., "Entropic lattice boltzmann method for microflow simulation," Nanomechanics Science and Technology: An International Journal, vol. 5, 2014.##[14] Rahmani, G. M. and Ashrafizaadeh, M., "Simulation of pressurization step of a psa process using the multicomponent lattice boltzmann method," 2014.##[15] Naghavi, S. M. and Ashrafizaadeh, M., "A comparison of two boundary conditions for the fluid flow simulation in a stirred tank," JCME, vol. 33, pp. 1530, 2014.##[16] Zhuo, C., Zhong, C., Guo, X., and Cao, J., "Mrtlbm simulation of fourliddriven cavity flow bifurcation," Procedia Engineering, vol. 61, pp. 100107, 2013.##[17] Yang, F. L., Zhou, S. J., Zhang, C. X., and Wang, G. C., "Mixing of initially stratified miscible fluids in an eccentric stirred tank: Detached eddy simulation and volume of fluid study," Korean Journal of Chemical Engineering, vol. 30, pp. 18431854, 2013.##[18] Wang, L., Zhang, B., Wang, X., Ge, W., and Li, J., "Lattice boltzmann based discrete simulation for gasâ€“solid fluidization," Chemical engineering science, vol. 101, pp. 228239, 2013.##[19] Wang, L., Zhang, B., Wang, X., Ge, W., and Li, J., "Lattice boltzmann based discrete simulation for gassolid fluidization," Chemical engineering science, vol. 101, pp. 228239, 2013.##[20] Derksen, J. and Van den Akker, H. E. A., "Large eddy simulations on the flow driven by a rushton turbine," AIChE Journal, vol. 45, pp. 209221, 1999.##[21] Guha, D., Ramachandran, P. A., Dudukovic, M. P., and Derksen, J. J., "Evaluation of large eddy simulation and eulereuler cfd models for solids flow dynamics in a stirred tank reactor," AIChE Journal, vol. 54, pp. 766778, 2008.##[22] Derksen, J. J., "Solid particle mobility in agitated bingham liquids," Industrial & Engineering Chemistry Research, vol. 48, pp. 22662274, 2009.##[23] Derksen, J. J., "Agitation and mobilization of thixotropic liquids," AIChE Journal, vol. 56, pp. 22362247, 2010.##[24] Derksen, J. J., "Direct flow simulations of thixotropic liquids in agitated tanks," The Canadian Journal of Chemical Engineering, vol. 89, pp. 628635, 2011.##[25] Derksen, J. J., "Simulations of mobilization of bingham layers in a turbulently agitated tank," Journal of NonNewtonian Fluid Mechanics, vol. 191, pp. 2534, 2013.##[26] Guo, Z., Shi, B., and Wang, N., "Lattice bgk model for incompressible navierstokes equation," Journal of Computational Physics, vol. 165, pp. 288306, 2000.##[27] Yu, D., Mei, R., Luo, L. S., and Shyy, W., "Viscous flow computations with the method of lattice boltzmann equation," Progress in Aerospace Sciences, vol. 39, pp. 329367, 2003.##[28] Du, R. and Liu, W., "A new multiplerelaxationtime lattice boltzmann method for natural convection," Journal of Scientific Computing, vol. 56, pp. 122130, 2013.##[29] He, X. and Luo, L. S., "Lattice boltzmann model for the incompressible navier stokes equation," Journal of Statistical Physics, vol. 88, pp. 927944, 1997.##[30] Dellar, P. J., "Incompressible limits of lattice boltzmann equations using multiple relaxation times," Journal of Computational Physics, vol. 190, pp. 351370, 2003.##[31] Du, R., Shi, B., and Chen, X., "Multirelaxationtime lattice boltzmann model for incompressible flow," Physics Letters A, vol. 359, pp. 564572, 2006.##[32] Bao, J., Yuan, P., and Schaefer, L., "A mass conserving boundary condition for the lattice boltzmann equation method," Journal of Computational Physics, vol. 227, pp. 84728487, 2008.##[33] Chun, B. and Ladd, A. J. C., "Interpolated boundary condition for lattice boltzmann simulations of flows in narrow gaps," Physical Review E, vol. 75, p. 66705, 2007.##[34] Krüger, T., Varnik, F., and Raabe, D., "Shear stress in lattice boltzmann simulations," Physical Review E, vol. 79, p. 46704, 2009.##[35] Schaefer, M., Turek, S., Durst, F., Krause, E., and Rannacher, R., "Benchmark computations of laminar flow around a cylinder," Notes on numerical fluid mechanics, vol. 52, pp. 547566, 1996.##[36] Peng, Y. and Luo, L. S., "A comparative study of immersedboundary and interpolated bounceback methods in lbe," Progress in Computational Fluid Dynamics, an International Journal, vol. 8, pp. 156167, 2008.##[37] Mei, R., Yu, D., Shyy, W., and Luo, L. S., "Force evaluation in the lattice boltzmann method involving curved geometry," Physical Review E, vol. 65, p. 041203, 2002.##[38] Wu, H. and Patterson, G. K., "Laser doppler measurements of turbulent flow parameters in a stirred mixer," Chemical engineering science, vol. 44, pp. 22072221, 1989.##[39] Chapple, D., Kresta, S. M., Wall, A., and Afacan, A., "The effect of impeller and tank geometry on power number for a pitched blade turbine," Trans ICheme, vol. 80, pp. 364372, 2002.##[40] Rutherford, K., Mahmoudi, S. M. S., Lee, K. C., and Yianneskis, M., "The influence of rushton impeller blade and disk thickness on the mixing characteristics of stirred vessels," Trans ICheme, vol. 74, pp. 369378, 1996.##[41] Costes, J. and Couderc, J. P., "Study by laser doppler anemometry of the turbulent flow induced by a rushton turbine in a stirred tank: Influence of the size of the units i. Mean flow and turbulence," Chemical engineering science, vol. 43, pp. 27512764, 1988.##]
1
Thermomechanical analysis of a coated cylinder head
Thermomechanical analysis of a coated cylinder head
http://jsme.iaukhsh.ac.ir/article_533508.html
1
This paper presents finite element analysis (FEA) of a coated and uncoated cylinder heads of a diesel engine to examine the distribution of temperature and stress. A thermal barrier coating system was applied on the combustion chamber of the cylinder heads, consists of twolayer systems: a ceramic top coat (TC), made of yttria stabilized zirconia (YSZ), ZrO28%Y2O3 and also a metallic bond coat (BC), made of NiCrAlY. The coating system in this research comprises 300 μm zirconium oxide TC and 150 μm BC. The threedimensional model of the cylinder heads was simulated in abaqus software and a twolayer viscoplasticity model was utilized to investigate the elastic, plastic and viscous behavior of the cylinder heads. The elastic and plastic properties of BC and TC layers were considered and the effect of thermal barrier coatings on distribution of temperature and stress was investigated. The aim of this study is to compare the distribution of temperature and stress in the coated and uncoated cylinder heads under thermomechanical loads. The results of FEA showed that the thermal barrier coating system reduces the temperature about 53°C because of its lower thermal conductivity. As a result, the cylinder heads tolerates lower temperature and fatigue life will increase. The results of thermomechanical analysis indicated that the stress in the coated cylinder heads decreased approximately 24 MPa for the sake of depletion of temperature gradient which can lead to higher fatigue lifetime.
0
This paper presents finite element analysis (FEA) of a coated and uncoated cylinder heads of a diesel engine to examine the distribution of temperature and stress. A thermal barrier coating system was applied on the combustion chamber of the cylinder heads, consists of twolayer systems: a ceramic top coat (TC), made of yttria stabilized zirconia (YSZ), ZrO28%Y2O3 and also a metallic bond coat (BC), made of NiCrAlY. The coating system in this research comprises 300 μm zirconium oxide TC and 150 μm BC. The threedimensional model of the cylinder heads was simulated in abaqus software and a twolayer viscoplasticity model was utilized to investigate the elastic, plastic and viscous behavior of the cylinder heads. The elastic and plastic properties of BC and TC layers were considered and the effect of thermal barrier coatings on distribution of temperature and stress was investigated. The aim of this study is to compare the distribution of temperature and stress in the coated and uncoated cylinder heads under thermomechanical loads. The results of FEA showed that the thermal barrier coating system reduces the temperature about 53°C because of its lower thermal conductivity. As a result, the cylinder heads tolerates lower temperature and fatigue life will increase. The results of thermomechanical analysis indicated that the stress in the coated cylinder heads decreased approximately 24 MPa for the sake of depletion of temperature gradient which can lead to higher fatigue lifetime.
35
48
Hojjat
Ashouri
Hojjat
Ashouri
Sama technical and vocational training college, Islamic Azad University, Varamin Branch, Varamin, Iran
Iran
ashouri1394@gmail.com
thermal barrier coating
Finite Element Analysis
cylinder heads and valves bridge
[[1] M. Metzeger, M. Leidenfrost, E. Werner, H. Riedel, and T. Seifert, “Lifetime Prediction of ENGJV 450 Cast Iron Cylinder Heads under Combined Thermomechanical and High Fatigue Loading,” SAE International Paper No.2014019047, 2014.##[2] F. Zahedi, and M. Azadi, “Low cycle fatigue life analysis of magnesium alloy diesel engine cylinder head,” 20th Annual International Conference on Mechanical Engineering, Shiraz , 2012.##[3] M. Azadi, G. Winter, G.H Farrahi, and W. Eichlseder, “ Design of cylinder head and block in international combustion engines based on fatigue strength of materials,” 8th International Conference on Internal Combustion Engines and Oil, Tehran, 2012.##[4] G.H. Farrahi, M. Ghodrati, M. Azadi, and M. Rezvani Rad, “ Stressstrain timedependent behavior of A356.0 aluminum alloy subject to cyclic thermal and mechanical lading,” Journal of Mech TimeDepend Mater, vol. 18, pp. 475491, 2014..##[5] M.H. Shoja'efard, M.R. Ghaffarpour, A.R. Nourpour, and S. Alizadenia, “Thermomechanical Analysis of an Engine Cylinder Head,” Journal of Automotive Engineering, vol. 220, pp. 627636, 2006..##[6] M. Quazi, and S. Parashar, “Effect of Thermal Bearing Coating on Performance and Emission of Off Road Vehicle,” SAE International, Paper No. 2015260065, 2015.##[7] S. Rupangudi, C. Ramesh, and K.V. Veerabhadhrappa, “ Study of Effect of Coating of Piston on the Performance of a Diesel Engine,” SAE International, Paper No. 2014011021, 2014.##[8] P. Ramu, and C.G. Saravanan, “Effect of ZrO2Al2O3 and SiC coating on diesel engineto study the combustion and emission characteristics,” SAE International, Paper No.2009011435, 2009.##[9] I. Taymaz, “The effect of thermal barrier coatings on diesel engine performance,” Journal of Surface and Coatings Technology, vol. 201, pp. 52495252, 2007.##[10] M. Rezvani rad, G.H. Farrahi, M. Azadi, and M. Ghodrati, “ Stress analysis of thermal barrier coating system subjected to outofphase thermomechanical loadings considering roughness and porosity effect,” Journal of surface & coating technology, vol. 262, pp. 7786, 2015.##[11] M. Azadi, M. Balo, G.H. Farrahi, and S.M. Mirsalim, “A review of thermal barrier effects on diesel engine performance and components lifetime, International Journal of Automotive Engineering,” vol. 3, pp. 305317, 2013.##[12] A. Moridi, M. Azadi, and G.H. Farrahi, “Thermomechanical stress analysis of thermal barrier coating system considering thickness and roughness effects,” Journal of surface and coating, vol. 243, 2014, pp. 9199.##[13] M. Bialas, “Finite element analysis of stress distribution in thermal barrier coating, Journal of surface and coating,” vol. 202, pp. 60026010, 2008.##[14] K. Slámečka, L. Čelko, P. Skalka, J. Pokluda, K. Němec, M. Juliš, L. Klakurková, and J. Švejcar, “Bending fatigue failure of atmosphericplasmasprayed CoNiCrAlY+ YSZ thermal barrier coatings,”International Journal of Fatigue, vol. 70, pp. 186195, 2015.##[15] R. Kamo, and W. Bryzik, “Adiabatic turbocompound engine performance prediction,” SAE International, Paper No.780068, 1978.##[16] R. Kamo, and W. Bryzik, “Ceramics in heat engines,” SAE International, Paper No.790645, 1979.##[17] R. Kamo, and W. Bryzik, “CumminsTRADOCOM adiabatic turbocompounded engine program,” SAE International, Paper No.810070,1981.##[18] R. Kamo, and W. Bryzik, “Cummins/TACOM advanced adiabatic engine,” SAE International Paper No. 840428, 1984.##[19] R.P. Sekar, and R. Kamo, 1984, “Advanced adiabatic diesel engine for passenger cars,” SAE International, Paper No. 840434, 1984.##[20] R. Kamo, M.E. Woods, and W. Bryzik, Thin thermal barrier coating for engines, United States Patent, Patent No. US4852542, 1989.##[21] M.F. Winkler, and D.W. Parker, “The role of diesel ceramic coatings in reducing automotive emissions and improving combustion efficiency,” SAE International Paper No. 930158, 1993.##[22] M.F. Winkler, D.W. Parker, and J.A. Bonar,1992, “Thermal barrier coatings for diesel engines: ten years of experience,” SAE International, Paper No. 922438, 1992.##[23] M. RanjbarFar, J. Absi, G. Mariaux, and F. Dubois, “ Simulation of the effect of material properties and interface roughness on the stress distribution in thermal barrier coatings using finite element method,” Journal of Materials and Design, vol. 31, pp. 772781, 2010.##[24] L. Wang, Y. Wang, W.Q. Zhang, X.G. Sun, J.Q. He, Z.Y. Pan and , C.H. Wang, “Finite element simulation of stress distribution and development in 8YSZ and doubleceramiclayer La2Zr2O7/8YSZ thermal barrier coatings during thermal shock,” Journal of Applied Surface Science, vol. 258, pp. 354355, 2012.##[25] M. Cerit, 2011, “Thermo mechanical analysis of a partially ceramic coated piston used in an SI engine, Journal of Surface and Coatings Technology,” vol. 205, pp. 34993505, 2011.##[26] M. Durat, M. Kapsiz, E. Nart, F. Ficici, and A. Parlak, “The effects of coating materials in spark ignition engine design, Journal of material and design,” vol. 36, 2012, pp. 540545.##[27] M. Marr, J. Wallace, S. Memme, S. Chandra, L. Pershin, and J. Mostaghimi, “An Investigation of Metal and Ceramic Thermal Barrier Coatings in a SparkIgnition Engine,” SAE International, Paper No.2010012090, 2010.##[28] D. Saad,P.Saad, L. Kamo, M. Mekari, W. Bryzik, and J. Tasdemir, “Thermal barrier coatings for high output turbocharged diesel engine,” SAE International, Paper No. 2007011442, 2007.##[29] E. Buyukkaya, and M. Cerit, “Thermal analysis of a ceramic coating diesel engine piston using 3D finite element method, ” Journal of surface & coating technology, vol. 202, pp. 398402, 2007.##[30] S. Du, X. Hu, Y. Feng, and J.Cheng, 2008, “Thermal Analysis of Functional Gradient Materials as Thermal Barrier Coating of Piston,” SAE International, Paper No. 2008012754, 2008.##[31] T. Hejwowski, “Comparative study of thermal barrier coating for internal combustion engine,” Journal of vacuum, vol. 85, pp. 610612, 2010.##[32] G. Sivakumar, and S. Kumar, “Investigation on effect of yttria stabilized zirconia coated piston crown on performance and emission characteristic of diesel engine,” Alexandria engineering journal, doi.org/10.1016/j.aej.2014.08.003, 2014.##[33] M. Ekström, A. Thibblin, A. Tjernberg, C. Blomqvist, and S. Jonsson, “Evaluation of internal thermal barrier coatings for exhaust manifolds,” Journal of surface & coatingtechnology, vol. 272, pp. 198212, 2015.##[34] M. Rezvani rad, M., Azadi, G.H. Farrahi, “Thermal barrier coating effect on stress distribution of a diesel engine cylinder head,” 7th Iranian Student Conference on Mechanical Engineering, School of Mechanical Engineering, University of Tehran, Tehran, Iran, 2013.##[35] E. Buyukkaya, “Thermal analysis of functionally graded coating AlSi alloy and steel pistons, Journal of surface & coating technology,” vol. 202, pp. 38563865, 2008.##[36] H. Ashouri, “Thermomechanical analysis of diesel engines cylinder heads using a twolayer viscoelasticity model with considering viscosity effects, International Journal of Automotive Engineering,” vol. 5, pp. 10261038, 2015.##[37] J.J. Thomas, L. Vergner, A. Bignonnet, and E. Charkaluk, “Thermomechanical design in the automotive industry,” Journal of Fatigue and Fracture of Engineering Material and Structure, vol. 27, pp. 887895, 2004.##[38] J. Kichenin, K. Dang van, and K. Boytard, 1996, “Finiteelement simulation of a new twodissipative mechanisms model for bulk mediumdensity polyethylene,” Journal of material science, vol. 32, pp. 16531661, 1996.##[39] A. Deshpande, S.B. Leen, and T.H. Hyde, “Experimental and numerical characterization of the cyclic thermomechanical behavior of a high temperature forming tool alloy,” ASME Journal of Manufacturing Science and Engineering, vol. 132, pp. 112, 2010.##[40] J. Lemaitre, and J. Chaboche, Mechanics of Solid Materials, Cambridge University Press, Cambridge, 1990.##[41] J.L. Chaboche, “Timeindependent constitutive theories for cyclic plasticity,” International Journal of Plasticity, vol.2, no. 2, pp. 149–188, 1986.##[42] J.L. Chaboche, “A review of some plasticity and viscoplasticity constitutive theories, International Journal of Plasticity,” vol. 24, pp. 1642–1693, 2008.##[43] M. Angeloni, Fatigue life evaluation of A356 aluminum alloy used for engine cylinder head, Ph.D. Thesis, University of Sau Palu, Brazil, 2011.##[44] G.Q. Sun, and D.G Shang, “Prediction Of Fatigue Lifetime Under Multiaxial Cyclic Loading Using Finite Element Analysis,” Journal of Material and Design, vol. 31, pp. 126133, 2010.##[45] S. Trampert, T. Gocmez, and S. Pisinger, 2008, “Thermomechanical fatigue life prediction of cylinder head in combustion engines,” Journal of Engineering for Gas Turbines and Power, vol. 130, pp.110, 2008.##[46] ABAQUS/CAE(v6.101), User’ s Manual , 2010.##[47] H.R. Chamani, I. Sattarifar, and M. Mohammadi Aghdam, “ Study of effect combustion gases and cooling thermal boundary conditions on temperature distribution of a heavy diesel engine cylinder head,” Journal of engine research, vol. 17, pp. 7181, 2009.##[48] L. Wang, Y. Wang, W.Q. Zhang, X.G. Sun, J.Q. He, Z.Y. Pan and , C.H. Wang, 2012, “A novel structure design towards extremely low thermal conductivity for thermal barrier coatings –Experimental and mathematical study,” Materials and design, vol. 35, pp. 505517, 2012.##[49] R. M. Mahamood, E. T .Akinlabi Member, I. M. Shukla, and S. Pityana, “ Functionally Graded Material: An Overview, Proceedings of the World Congress on Engineering,” London, U.K.,2012.##]
1
Computational fluid dynamics analysis and geometric optimization of solar chimney power plants by using of genetic algorithm
Computational fluid dynamics analysis and geometric optimization of solar chimney power plants by using of genetic algorithm
http://jsme.iaukhsh.ac.ir/article_533509.html
1
In this paper, a multiobjective optimization method is implemented by using of genetic algorithm techniques in order to determine optimum configuration of solar chimney power plant. The objective function which is simultaneously considered in the analysis is output power of the plant. Output power of the system is maximized. Design parameters of the considered plant include collector radius (Rc), collector height (Hc), chimney height (Ht), chimney radius (Rt) and heat flux ( ). The multiobjective optimization results show that there are a strong positive correlation between the chimney height and the output power, as well as a negative correlation between the solar collector radius and the output power. Also, it was concluded that, output power of the plant could be considerably increased with increasing solar chimney height while increasing collector radius could slightly reduce output power This study may be useful for the preliminary estimation of power plant performance and the powerregulating strategy option for solar chimney turbines.
0
In this paper, a multiobjective optimization method is implemented by using of genetic algorithm techniques in order to determine optimum configuration of solar chimney power plant. The objective function which is simultaneously considered in the analysis is output power of the plant. Output power of the system is maximized. Design parameters of the considered plant include collector radius (Rc), collector height (Hc), chimney height (Ht), chimney radius (Rt) and heat flux ( ). The multiobjective optimization results show that there are a strong positive correlation between the chimney height and the output power, as well as a negative correlation between the solar collector radius and the output power. Also, it was concluded that, output power of the plant could be considerably increased with increasing solar chimney height while increasing collector radius could slightly reduce output power This study may be useful for the preliminary estimation of power plant performance and the powerregulating strategy option for solar chimney turbines.
49
60
Amir
Karami
Amir
Karami
1Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
Iran
amirkarami@iaukhsh.ac.ir
Davood
Toghraie
Davood
Toghraie
Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran, Toghraee@iaukhsh.ac.ir
Iran
toghraee@iaukhsh.ac.ir
Solar Chimney
Geometric Optimization
Genetic algorithm
Output Power
collector
[[1] P. Hoffmann and B. Dorgan, “Tomorrow's energy: hydrogen, fuel cells, and the prospects for a cleaner planet,” MIT press, 2012.##[2] L.B. Mullett, “The solar chimneyoverall efficiency, design and performance,” International Journal of Ambient Energy, vol.8, pp.3540, 1987## [3] T.W. von Backström and A.J. Gannon, “Compressible flow through solar power plant chimneys,” Journal of Solar Energy Engineering, vol. 122, pp.138–145, 2000.##[4] J.P. Pretorius and D.G. Kröger, “Critical evaluation of solar chimney power plant performance,” Solar Energy, vol. 80, pp. 535–544, 2006.##[5] T. Ming, W. Liu, G. Xu and A. Fan, “A study of the solar chimney power plant systems,” Journal of Engineering Thermophysics, vol. 27, pp. 505512, 2006.##[6] H. Pastohr, O. Kornadt and K. Gürlebeck, “Numerical and analytical calculations of the temperature and flow field in the upwind power plant,” International Journal of Energy Research, vol. 28, pp.495–510, 2004.##[7] X. Zhou, J. Yang, B. Xiao and G. Hou, “Experimental study of temperature field in a solar chimney power setup,” Applied Thermal Engineering, vol. 27, pp.2044–2050, 2007.##[8] A. Koonsrisuk, S. Lorente and A. Bejan, “Constructal solar chimney configuration,” International Journal of Heat and Mass Transfer, vol. 53, pp.327–333, 2010.##[9] S.K. Patel, D. Prasad and M.R. Ahmed, “Computational studies on the effect of geometric parameters on the performance of a solar chimney power plant,” Energy Conversion and Management, vol. 77, pp. 424–431, 2014.##[10] S. Dehghani and A.H. Mohammadi, “Optimum dimension of geometric parameters of solar chimney power plants–A multiobjective optimization approach,” Solar Energy, vol. 105, pp.603–612, 2014.##[11] E. Gholamalizadeh and M.H.Kim, “Thermoeconomic tripleobjective optimization of a solar chimney power plant using genetic algorithms,” Energy, vol. 70, pp.204–211, 2014.##[12] Z. Zou, Z. Guan and H. Gurgenci, “Optimization design of solar enhanced natural draft dry cooling tower,” Energy Conversion and Management, vol. 76, pp.945–955, 2013.##[13] W. Li, P. Wei and X. Zhou, “A costbenefit analysis of power generation from commercial reinforced concrete solar chimney power plant,” Energy Conversion and Management, vol.79, pp.104–113, 2014.##[14] A. Al Alawin, O. Badran, A. Awad, Y. Abdelhadi and A. AlMofleh, “Feasibility study of a solar chimney power plant in Jordan,” Applied Solar Energy, vol. 48, pp.260–265, 2012.##[15] A. Asnaghi and S.M. Ladjevardi, “Solar chimney power plant performance in Iran,” Renewable and Sustainable Energy Reviews, vol. 16, pp.3383–3390, 2012.##[16] J.P. Pretorius, D.G. Kröger, “Thermoeconomic optimization of a solar chimney power plant,” Journal of Solar Energy Engineering, vol. 130, pp.21015, 2008.##[17] J. Schlaich, R. Bergermann, W. Schiel, G. Weinrebe, “Design of commercial solar updraft tower systems—utilization of solar induced convective flows for power generation,” Journal of Solar Energy Engineering, vol. 127, pp. 117–124, 2005.##[18] A. Koonsrisuk, T. Chitsomboon, “Accuracy of theoretical models in the prediction of solar chimney performance, Solar Energy, vol. 83, pp.1764–1771, 2009.##[19] C. Onyeka Okoye, O. Solyalı and O. Taylan, “A new economic feasibility approach for solar chimney power plant design,” Energy Conversion and Management, vol. 126, pp.1013–1027, 2016##[20] J. Li, H. Guo and S. Huang, “Power generation quality analysis and geometric optimization for solar chimney power plants,” Solar Energy, vol. 139, pp. 228–237, 2016.##[21] Roozbeh Sangi, Majid Amidpour, Behzad Hosseinizadeh, “Modeling and numerical simulation of solar chimney power plants,” Solar Energy, vol. 85, pp.829–838, 2011.##[21] P. Guo, J. Li, Y. Wang and Y. Liu, “Numerical analysis of the optimal turbine pressure drop ratio in a solar chimney power plant,” Solar Energy, vol. 98, pp. 42–48, 2013.##[22] F. Cao, H. Li, L. Zhao, T. Bao and L. Guo, “Design and simulation of the solar chimney power plants with TRNSYS,” Solar Energy, vol. 98, pp.23–33, 2013##[23] P. Guo, J. Li, Y. Wang and Y. Wang, “Evaluation of the optimal turbine pressure drop ratio for a solar chimney power plant,” Energy Conversion and Management, vol. 108, pp.14–22, 2016.##[24] E. Gholamalizadeh and M. Kim, “CFD (computational fluid dynamics) analysis of a solarchimney power plant with inclined collector roof,” Energy, vol. 107, pp.661667, 2016.##[25] E. Shabahang Nia and M. Ghazikhani, “Numerical investigation on heat transfer characteristics amelioration of a solar chimney power plant through passive flow control approach,” Energy Conversion and Management, vol. 105, pp. 588–595, 2015##[26] M. Mehrpooya, M. Shahsavan and M. Moftakhari Sharifzadeh, “Modeling, energy and exergy analysis of solar chimney power plantTehran climate data case study,” Energy, vol. 115, pp.257273, 2016##]
1
On the dynamic stability of a flying vehicle under the follower and transversal forces
On the dynamic stability of a flying vehicle under the follower and transversal forces
http://jsme.iaukhsh.ac.ir/article_535389.html
1
This paper deals with the problem of the instability regions of a freefree uniform Bernoulli beam consisting of two concentrated masses at the two free ends under the follower and transversal forces as a model for a space structure. The follower force is the model for the propulsion force and the transversal force is the controller force. The main aim of this study is to analyze the effects of the concentrated masses on the beam instability. It is determined that the transverse and rotary inertia of the concentrated masses cause a change in the critical follower force. This paper also offers an approximation method as a design tool to find the optimal masses at the two tips using an artificial neural network (ANN) and genetic algorithm (GA). The results show that an increase in the follower and transversal forces leads to an increase of the vibrational motion of the beam which is not desirable for any control system and hence it must be removed by proper approaches.
0
This paper deals with the problem of the instability regions of a freefree uniform Bernoulli beam consisting of two concentrated masses at the two free ends under the follower and transversal forces as a model for a space structure. The follower force is the model for the propulsion force and the transversal force is the controller force. The main aim of this study is to analyze the effects of the concentrated masses on the beam instability. It is determined that the transverse and rotary inertia of the concentrated masses cause a change in the critical follower force. This paper also offers an approximation method as a design tool to find the optimal masses at the two tips using an artificial neural network (ANN) and genetic algorithm (GA). The results show that an increase in the follower and transversal forces leads to an increase of the vibrational motion of the beam which is not desirable for any control system and hence it must be removed by proper approaches.
61
76
Omid
Kavianipour
Omid
Kavianipour
Young Researchers and Elite Club, Damavand Branch, Islamic Azad University, Damavand, Iran
Iran
o.kavianipour@gmail.com
Majid
Sohrabian
Majid
Sohrabian
Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Iran
o.kavianipour@yahoo.com
Beam instability
Follower force
Vibration analysis
Artificial Neural Network (ANN)
Genetic Algorithm (GA)
[Ryu SU, Sugiyama Y. Computational dynamics approach to the effect of damping on stability of a cantilevered column subjected to a follower force. Computers and Structures. 2003; 81(4): 265271.##Detinko FM. Lumped damping and stability of Beck column with a tip mass. International Journal of Solids and Structures. 2003; 40(17): 44794486.##Di Egidio A, Luongo A, Paolone A. Linear and nonlinear interactions between static and dynamic bifurcations of damped planar beams. International Journal of NonLinear Mechanics. 2007; 42(1): 8898.##Lee JS, Kim NII, Kim MY. Subtangentially loaded and damped Beck’s columns on twoparameter elastic foundation. Journal of Sound and Vibration. 2007; 306(35): 766789.##Sugiyama Y, Langthjem MA. Physical mechanism of the destabilizing effect of damping in continuous nonconservative dissipative systems. International Journal of NonLinear Mechanics. 2007; 42(1): 132145.##Tomski L, Szmidla J, Uzny S. The local and global instability and vibration of systems subjected to nonconservative loading. ThinWalled Structures. 2007; 45(1011): 945949.##Shvartsman BS. Large deflections of a cantilever beam subjected to a follower force. Journal of Sound and Vibration. 2007; 304(35): 969973.##Katsikadelis JT, Tsiatas GC. Optimum design of structures subjected to follower forces. International Journal of Mechanical Sciences. 2007; 49(11): 12041212.##De Rosa MA, Auciello NM, Lippiello M. Dynamic stability analysis and DQM for beams with variable crosssection. Mechanics Research Communications. 2008; 35(3): 187192.##Djondjorov PA, Vassilev VM. On the dynamic stability of a cantilever under tangential follower force according to Timoshenko beam theory. Journal of Sound and Vibration. 2008; 311(35): 14311437.##Attard MM, Lee JS, Kim MY. Dynamic stability of shearflexible beck’s columns based on Engesser’s and Haringx’s buckling theories. Computers and Structures. 2008; 86(2122): 20422055.##Marzani A, Tornabene F, Viola E. Nonconservative stability problems via generalized differential quadrature method. Journal of Sound and Vibration. 2008; 315(12): 176196.##Pirmoradian M. Dynamic stability analysis of a beam excited by a sequence of moving mass particles. Journal of Solid Mechanics in Engineering. 2015; 8(1): 4149. ##Beal TR. Dynamic stability of a flexible missile under constant and pulsating thrusts. AIAA Journal. 1965; 3(3): 486494.##Wu JJ. On the stability of a freefree beam under axial thrust subjected to directional control. Journal of Sound and Vibration. 1975; 43(1): 4552.##Park YP, Mote CD. The maximum controlled follower force on a freefree beam carrying a concentrated mass. Journal of Sound and Vibration. 1984; 98(22): 247256.##Park YP. Dynamic stability of a free Timoshenko beam under a controlled follower force. Journal of Sound and Vibration. 1987; 113(3): 407415.##Sato K. On the governing equation for vibrating and stability of a Timoshenko beam: Hamilton's Principle. Journal of Sound and Vibration. 1991; 145(2): 338340.##Mladenov KA, Sugiyama Y. Stability of a jointed freefree beam under end rocket thrust. Journal of Sound and Vibration. 1997; 199(1): 115. ##Kim JH, Choo YS. Dynamic stability of a freefree Timoshenko beam subjected to a pulsating follower force. Journal of Sound and Vibration. 1998; 216(4): 623636. ##Kim KH, Kim JH. Effect of Crack on the Dynamic Stability of a FreeFree Beam Subjected to a Follower Force. Journal of Sound and Vibration. 2000; 233(1): 119135.##Wang Q. A comprehensive stability analysis of a cracked beam subjected to follower compression. International Journal of Solids and Structures. 2004; 41(1819): 48754888.##Caddemi S, Caliò I, Cannizzaro F. Flutter and divergence instability of the multicracked cantilever beamcolumn. Journal of Sound and Vibration. 2014; 333(6): 17181733.##Sohrabian M, Ahmadian H, Fathi R. Flutter Instability of Timoshenko Cantilever Beam Carrying Concentrated Mass on Various Locations. Latin American Journal of Solids and Structures. 2016; 13(16): 30053021.##Irani S, Kavianipour O. Effects of a flexible joint on instability of a freefree jointed bipartite beam under the follower and transversal forces. Journal of Zhejiang University SCIENCE A. 2009; 10(9): 12521262.##Kavianipour O, Sadati SH. Effects of damping on the linear stability of a freefree beam subjected to follower and transversal forces. Structural Engineering and Mechanics. 2009, 33(6): 709724.##Kavianipour O, Khoshnood AM, Sadati SH. Reduction of the actuator oscillations in the flying vehicle under a follower force. Structural Engineering and Mechanics. 2013; 47(2): 149166. ##Meirovitch L. Principles and Techniques of Vibrations. PrenticeHall International, Inc., New Jersey, 1997.##Hodges DH, Pierce GA. Introduction to Structural Dynamics and Aeroelasticity. The Press Syndicate of The University of Cambridge, Cambridge, 2002. ##Craig RR, Kurdila AJ. Fundamentals of Structural Dynamics. 2nd edn John Wiley & Sons, Inc., New Jersey, 2006.##]