ORIGINAL_ARTICLE
Investigation of Linear and Nonlinear Buckling of Orthotropic Graphene Sheets with Nonlocal Elasticity Theories
In this paper, analysis of linear and nonlinear buckling of relatively thick orthotropic graphene sheets is carried out under mechanical load based on elasticity theories. With the help of nonlocal elasticity theory, the principle of virtual work, first order shear theory and Von-Karman nonlinear strain, the dominant relationship in terms of obtained displacements has been obtained, and the method of differential quadrature (DQ) with non-uniform distribution points (Chebyshev -Gauss-Lobato) has been used. To check the validity, the obtained results have been compared with other resources, and the effects of nonlocal coefficient, thickness, radius and elastic base on the dimensionless buckling loads were calculated and investigated. Moreover, the results of analysis using nonlocal and local theory were compared together. It can be noticed that the dimensionless buckling loads on graphene sheets increased more with a decrease in flexibility as far boundary condition is concerned. Additionally, with an increase in the sheet radius, the variation between nonlocal and local analysis results will be more.
http://jsme.iaukhsh.ac.ir/article_515973_d8f979683e161eea6ece6f2b4c6eb85d.pdf
2014-12-22
13
1
Buckling
Graphene sheets
Orthotropic
Nonlocal elasticity theories
Method of differential quadrature (DQ)
M.
Sadeghian
msadeghian@mshdiau.ac.ir
1
MSc Student, Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran
LEAD_AUTHOR
M.
Jabarzadeh
2
Assistant Prof., Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran
AUTHOR
[1] Taniguchi N.,On the Basic Concept of Nanotechnolog, Proceedings of the International Conference of Production Engineering, London, 1974, pp.18-23.
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[14]Parnes R., Chiskis A., Buckling of nano-fibre reinforced composites: a re-examination of elastic buckling, Journal ofMechanics and Physics of Solids, Vol. 50, 2002, pp. 855–879.
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[15]Pradhan S.C., Murmu T., Small Scale Effect onthe Buckling of Single-Layered GrapheneSheetsunder Biaxial Compression via Nonlocal Continuum Mechanics, Computational Materials Science, Vol. 47, 2009, pp. 268-274.
15
[16]Samaei A.T., Abbasion S., Mirsayar M.M., Buckling Analysis of a Single-Layer Graphene Sheet Embedded in an Elastic Medium Based on Nonlocal Mindlin Plate Theory, Mechanics Research Communications, Vol. 38, 2011, pp.481-485.
16
[17]Farajpour A., Danesh M., Mohammadi M., Buckling analysis of variable thickness nanoplates using nonlocal continuum mechanics, PhysicaE., Vol. 44, 2011, pp.719–727.
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[18]Narendar S., Gopalakrishnan S., Critical buckling temperature of single-walled carbon nanotubes embedded in a one-parameter elastic medium based on nonlocal continuum mechanics, Physica E., Vol. 43, 2011, pp. 1185–1191.
18
[19] Lim C.W., Yang Q., Zhang J.B., Thermal buckling of nanorod based on non-local elasticity theory, International Journal of Non-Linear Mechanics, Vol. 47, 2012, pp. 496-505.
19
[20] Farajpour A., Shahidi A.R., Mohammadi M., Mohzoon M., Buckling of Orthotropic Micro/Nanoscale Plates under Linearly varying in-plane load via nonlocal continuum mechanics, Composite Structures, Vol. 94, 2012, pp. 1605-1615.
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[21] Prasanna Kumar T.J., Narendar S., Gopalakrishnan S., Thermal vibration analysis of monolayer graphene embedded in elastic medium based on nonlocal continuum mechanics. Composite Structures, Vol. 100, 2013, pp. 332–342.
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[22] Emam S.A., A general nonlocal nonlinear model for buckling of nanobeams, Applied Mathematical Modelling, Vol. 37, 2013, pp. 6929–6939.
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[23] Mohammadi M., Farajpour A., Moradi A., Ghayour M., Shear buckling of orthotropic rectangular graphene sheet embedded in an elastic medium in thermal environment, Composites: Part B, Vol. 56 , 2014, pp. 629–637.
23
[24] Sarrami-Foroushani S., Azhari M., Nonlocal vibration and buckling analysis of single and multi-layered graphene sheets using finite strip method including van der Waals effects, Physica E., Vol. 57, 2014, pp. 83–95.
24
[25] Golmakania M.E., Rezatalaba J., Nonuniform biaxial buckling of orthotropic nanoplates embedded in an elastic medium based on nonlocal Mindlin plate theory, Composite Structures, Vol. 119, 2015, pp. 238–250.
25
[26] Farajpour A., Mohammadi M., Shahidi A.R., Mahzoon M., Axisymmetric Buckling of the Circular Graphene Sheets with the Nonlocal continuum plate model, Physica E., Vol. 43, 2011, pp. 1820–1825.
26
[27] KaramoozRavari M.R., Shahidi A.R., Axisymmetric buckling of the circularannularnanoplates using finite difference method, Mechanica, Vol. 48, 2013, pp. 135–144.
27
[28] Bedroud M., Hosseini-Hashemi S., Nazemnezhad R., Buckling of circular/annular Mindlinnanoplates via nonlocal lasticity,Acta Mechanics, Vol. 224, 2013, pp. 2663-2676.
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[29] Nosier A., Fallah F., Non-linear Analysis of Functionally Graded Circular Plates under Asymmetric Transverse Loading, International journal of non-Linear mechanics, Vol. 44 , 2009, pp. 928-942.
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[30]Naderi A., Saidi A.R., Exact solution for stability analysis of moderately thick functionally graded, Composite Structures, Vol. 93, 2011, pp. 629–638.
30
[31]Shu C.,Differential Quadrature and Its Application in Engineering, Berlin, Springer.
31
ORIGINAL_ARTICLE
Numerical Analysis of Melting Process of Compounds Containing Nanoparticles for the Development of Phase Change Process
In this work, the melting process of compounds containing nanoparticles of NePCM in a square hole with different angles affected by two pairs of well-spring heat source on horizontal walls was numerically investigated. Four different configurations of elements were employed to investigate the effect of changes in the position of elements on the horizontal walls of the well-spring landscape on the ratio of liquid fraction. In the first case, the springs and wells have been located on horizontal walls separately. The environmental condition in the second case is that the spring-well elements have been set on the horizontal walls alternatively. In the third case, springs are on the left of well elements, and ultimately in the fourth case, spring and well elements are all set at the bottom of horizontal walls. Results show that in the first arrangement, using 2%weight of Al2O3 nanoparticles, compared to other cases, the highest ratio of liquid fraction is obtained.
http://jsme.iaukhsh.ac.ir/article_515974_9aac13ef18786e48dc330eea9ad41086.pdf
2014-12-22
29
13
Melting rate
Paraffin
nanoparticles
N.
Pourmohammad
1
Associate Prof., Department of Mechanical Engineering, Urmia University, Urmia, Iran
AUTHOR
N.
Mostafavinia
nassermostafavi@gmail.com.
2
PhD Student, Department of Mechanical Engineering, Urmia University, Urmia, Iran
LEAD_AUTHOR
A.
Hassanzadeh
3
PhD Student, Department of Mechanical Engineering, Urmia University, Urmia, Iran
AUTHOR
[1] FaridM.M., KhudhairA.M., RazackS.A.K., Al-HallajS., A review on phase change energy storage: materials and applications, Energy Conversion and Management, Vol. 45, No.9–10,2004, pp. 1597–1615.
1
[2] ZhouD., ZhaoC.Y., TianY., Review on thermal energy storage with phase change materials (PCMs) in building applications, Applied Energy, Vol. 92, 2012, pp.593–605.
2
[3] ZalbaB., Marı́nJ.M., CabezaL.F., MehlingH., Review on thermal energy storage with phase change: materials, heat transfer analysis and applications, Applied Thermal Engineering, Vol. 23, No. 3, 2003, pp.251–283.
3
[4] AtulS., TyagiV.V., ChenC.R., BuddhiD., Review on thermal energy storage with phase change materials and applications, Renewable and Sustainable Energy Reviews, Vol. 13 ,2009, pp. 318–345.
4
[5] MengE., Yu, ZhanG., HeY., Experimental and numerical study of the thermal performance of a new type of phase change material room, Energy Conversion and Management, 74 ,2013, pp.386–394.
5
[6] ZhangY., ChenZ., WangQ., WuQ., Melting in an enclosure with discrete heating at a constant rate, Experimental Thermal and Fluid Science, Vol. 6 ,1993, pp.196–201.
6
[7] FarajiM., El QarniaH., Numerical study of melting in an enclosure with discrete protruding heat sources, Applied Mathematics Modeling, Vol. 34,2010, pp.1258–1275.
7
[8]KousksouT., MahdaouiM., AhmedA., MsaadA.A., Melting over a wavy surface in a rectangular cavity heated from below, Energy, Vol. 64,2014, pp.212-219.
8
[9] KhodadadiJ.M., HosseinizadehS.F., Nanoparticle-enhanced phase change materials (NEPCM) with great potential for improved thermal energy storage, International Communication in Heat and Mass Transfer,Vol. 34,2007, pp.534–543.
9
[10] ZengJ.L., SunL.X., XuF., TanZ.C., ZhangZ.H., ZhangJ., ZhangT., Study of a PCM based energy storage system containing Ag nanoparticles, Journal of Thermal Analysis and Calorimetry, Vol. 87,2007, pp.369–373.
10
[11] WuS.Y., WangH., XiaoS., ZhuD.S., An investigation of melting/freezing characteristics of nanoparticle-enhanced phase change materials, Journal of Thermal Analysis and Calorimetry, Vol. 110,2012, pp.1127–1131.
11
[12] ChowL.C., ZhongJ.K., Thermal conductivity enhancement for phase change storage media, International Communications in Heat and Mass Transfer, Vol. 23,1996, pp. 91–100.
12
[13] VajjhaR.S., DasD.K., Measurement of thermal conductivity of threenanofluids and development of new correlations, Journal of Heat and Mass Transfer,Vol. 52,2009, pp.4675–4682.
13
[14] HoC.J., GaoT.Y., Preparation and thermophysical properties of nanoparticle-in-paraffin emulsion as phase change material, International Communications in Heat and Mass Transfer,Vol. 36, No.5, 2009, pp.467-470.
14
[15] KashaniS., RanjbarA.A., AbdollahzadehM., SebtiS., Solidification of nano-enhanced phase change material (NEPCM) in a wavy cavity, Heat Mass Transfer,Vol. 48,2012, pp. 1155–1166.
15
[16] HosseinizadehS.F., RabienatajDarziA.A., TanF.L., Numerical investigations of unconstrained melting of nano-enhanced phase change material (NEPCM) inside a spherical container, International Journal of Thermal Science,Vol. 41,2012, pp.77–83.
16
[17] ArasuA.V., MujumdarA.S., Numerical study on melting of paraffin wax with Al2O3 in a square enclosure, International Communications in Heat and Mass Transfer,Vol. 39,2012, pp.8–16.
17
[18] SebtiS., MastianiM., MirzaeiH., DadvandA., KashaniS., HosseiniS.A., Numerical study of the melting of nano-enhanced phase change material in a square cavity, Journal of Zhejiang University Science A, Vol. 14, No.5, 2013, pp.307-316.
18
[19] HoC.J., GaoJ.Y., An experimental study on melting heat transfer of paraffin dispersed with Al2O3 nanoparticles in a vertical enclosure, International Journal of Heat and Mass Transfer, Vol. 62, 2013, pp.2–8.
19
[20] ZengY., FanL.W., XiaoY.Q., YuZ.T., CenK.F., An experimental investigation of melting of nanoparticle-enhanced phase change materials (NePCMs) in a bottom-heated vertical cylindrical cavity, International Journal of Heat and Mass Transfer, Vol. 66,2013, pp.111–117.
20
[21] El-HasadiY.M.F., KhodadadiJ.M., Numerical simulation of the effect of the size of suspensions on the solidification process of nanoparticle-enhanced phase change materials, Journal of Heat Transfer, Vol. 135, No.5, 2013, 052901.
21
[22] N.S. Dhaidan, J.M. Khodadadi, T.A. Al-Hattab, S.M. Al-Mashat, Experimental and numerical investigation of melting of phase change material/nanoparticle suspensions in a square container subjected to a constant heat flux, InternationalJournal of Heat and Mass Transfer, Vol. 66,2013, pp.672–683.
22
[23] DhaidanN.S., KhodadadiJ.M., Al-HattabT.A., Al-MashatS.M., Experimental and numerical study of constrained melting of n-octadecane with CuO nanoparticle dispersions in a horizontal cylindrical capsule subjected to a constant heat flux, InternationalJournal of Heat and Mass Transfer, Vol. 67,2013, pp.523–534
23
[24] DhaidanN.S., KhodadadiJ.M., Al-HattabT.A., Al-MashatS.M., Experimental and numerical investigation of melting of NePCM inside an annular container under a constant heat flux including the effect of eccentricity, International Journal of Heat and Mass Transfer, Vol. 67 , 2013, pp.455–468.
24
[25] JourabianM., FarhadiM., SedighiK., On the expedited melting of phase change material (PCM) through dispersion of nanoparticles in the thermal storage unit, Computers and Mathematics with Applications,Vol. 67,2014, pp.1358-1372.
25
[26] http://www.fluent.com.
26
[27] KandasamyR., WangX.Q., MujumdarA.S., Transient cooling of electronics using phase change material (PCM)-based heat sinks, Applied Thermal Engineering,Vol. 28,2008, pp.1047–1057.
27
[28] SasmitoA.P., KurniaJ.C., MujumdarA.S., Numerical evaluation of laminar heat transfer enhancement in nanofluid flow in coiled square tubes, Nanoscale Research Letters, Vol. 6, No.1, 2011, pp.1-14.
28
[29] ArasuA.V., SasmitoA.P., MujumdarA.S., Numerical performance study of paraffin wax dispersed with Alumina in a concentric pipe latent heat storage system, Thermal Science, Vol. 17, 2013, pp.419-430.
29
[30] VajjhaR.S., DasD.K., NamburuP.K., Numerical study of fluid dynamic and heat transfer performance of Al2O3 and CuOnanofluids in the flat tubes of a radiator, International Journal of Heat Fluid Flow, Vol. 31, 2010, pp.613–621.
30
ORIGINAL_ARTICLE
Disk Vibration Analysis of Functionally Graded Materials
Perforated discs have many applications in different parts of industry. By making such disks of functionally graded materials, more capabilities can be obtained from them. Vibration analysis of these kinds of disks can help us make them more efficient. In this paper, modeling and evaluation of disk vibration of functionally graded materials with regard to thickness were carried out using Abaqus software. Since no certain element has been defined regarding functionally graded materials for the design and analysis of a particular element in Abaqus software, molding of such materials has been used in this application. In order to verify the results, the results obtained from ABAQUS analysis have been compared with those available in the literature. The obtained results show that by defining more layers with regard to changes in properties, the obtained results approach the exact solutions.
http://jsme.iaukhsh.ac.ir/article_515976_930442d76aa938e59b585a544c1b2a0f.pdf
2014-12-22
35
29
Functionally Graded Materials
Discs
Vibration analysis
Abaqus Software
M.
validity
1
Master of Science, Faculty of Mechanics, University of Khomeini Shahr
AUTHOR
H.
Nahvi
nahvi@iaukhsh.ac.ir
2
Associate Professor, Faculty of Mechanics, University of Khomeini Shahr
LEAD_AUTHOR
[1] Liu C.F., Lee Y.T., Finite element analysis of three- dimensional vibration of thick circular and annular plates, Journal of Sound and Vibration, Vol. 233, 2000, pp.63-80.
1
[2] Liu C.F., Lee J.F., Lee Y.T., Axisymmetric vibration analysis of rotating annular plates by a 3D finite element, Journal of Solid and Structures, Vol. 37, 2000, pp. 5813-5827.
2
[3] Zhou D., Cheung Y.K., Lo S.H., Au F.T.K., 3D vibration analysis of solid and hollow circular cylinders via Chebyshev-Ritz method, Journal of Computer Method in Applied Mechanics and Engineering, Vol. 192, 2003, pp. 1575-1589.
3
[4] Zhou D., Cheung Y.K., Lo S.H., Au F.T.K., Three-dimensional vibration analysis of circular and annular plates via Chebyshev-Ritz method, Journal of Solid and Structures, Vol. 40, 2003, pp. 3089-3105.
4
[5] Chi S., Chung Y., Mechanical behavior of functionally graded material plates under transverse load-Part I: Analysis, International Journal of Solids and Structures, Vol. 43, 2006, pp 3657–3674.
5
[6] Chi S., Chung Y., Mechanical behavior of functionally graded material plates under transverse load-Part II: Numerical results, International Journal of Solids and Structures, Vol. 43, 2006, pp 3674–3691.
6
[7] Nie G.J., Zhong Z., Semi-analytical solution for three-dimensional vibration of functionally graded circular plates, Journal of Computer Method in Applied Mechanics and Engineering, Vol. 196, 2007, pp. 4901–4910,.
7
[8] Ebrahimi F., Rastgoo A., Free vibration analysis of smart annular FGM plates integrated with piezoelectric layers, Smart Materials and Structures, Vol. 17, 2008, pp. 13.
8
ORIGINAL_ARTICLE
Bending Sector Graphene Sheet Based on the Elastic Winkler-Pstrnak with the Help of Nonlocal Elasticity Theory Using Developed Kantorovich Method
In this study, the elastic bending of sector graphene sheet has been studied based on elasticity using Eringen Nonlocal Elasticity Theory. In order to do this, the balance equations governing the sector graphene sheet have been solved in terms of displacements with regard to nonlocal relationship of stress, shear theory of the first order, and obtained linear strains using developed Kantorovich method. In this method, the obtained partial differential equations are converted into two categories that can be solved using analytical and numerical methods. Developed Kantorovich method is a method with a high rate of convergence, in which the expected convergence is achieved with just three to four repetitions. With regard to the fact that no research has yet been conducted in this regard, the results, considering the nonlocal coefficient equal to zero, have been compared with other articles in order to check the validity. In the end, the effect of nonlocal coefficient variations on the results in terms of thickness, boundary conditions, hardness of elastic base and difference between nonlocal and local elasticity analysis has been studied.
http://jsme.iaukhsh.ac.ir/article_515977_0a0f420e82d74a267bfc47065e05b014.pdf
2014-12-22
49
35
Sector graphene sheet
Nonlocal Continuum Field mechanic
Developed Kantorovich method
Elastic Winkler-Pstrnak
Sh.
Dastjerdi
dastjerdi_shahriar@yahoo.com
1
MSc Student, Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
AUTHOR
M.
Jabarzadeh
2
Assistant Prof., Department of Mechanical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran
LEAD_AUTHOR
[1] Gibson R.F., Ayorinde E.O., Wen Y.F., Vibrations of Carbon Nanotubes and their Composites: A Review, Composites science and technology, Vol. 67, 2007, pp. 1-28.
1
[2] Geim A.K., Graphene: Status and Prospects, Science, Vol. 324, 2009, pp. 1530-1534.
2
[3] Kroto H.W., Heath J.R., O’Brien S.C, Curl R.F., Buckminster Fullerene, Nature, Vol. 318, 1985, pp. 162-163.
3
[4] Iijima S., Helical Microtubules of Graphitic Carbon, Nature, Vol. 8, 1991, pp. 354-356.
4
[5] Kong X.Y., Ding Y., Single-Crystal Nano-rings Formed by Epitaxial Self-Coiling of Polar Nano-belts, Science, Vol. 303, 2004, pp. 1348-1351.
5
[6] Chunyu Li, Atomistic Simulations on Multilayer Graphene Reinforced Epoxy Composites, Composites: Part A, Vol. 43, 2012, pp. 1293-1300.
6
[7] Kuilla T., Bhadra S., Yao D., Kimc N.M., Bosed S., Leea J.H., Recent Advances in Graphene Based Polymer Composites, Progress in polymer science, Vol. 35, 2010, pp. 1350-1375.
7
[8] Arash B., Wang Q., A Review on the Application of Nonlocal Elastic Models in Modeling of Carbon Nanotubes and Graphene, Computational materials science, Vol. 51, 2012, pp. 303-313.
8
[9] Pradhan S.C., Kumar A., Vibration Analysis of Orthotropic Graphene Sheets Using Nonlocal Elasticity Theory and Differential Quadrature Method, Composite structures, Vol. 93, 2004, pp. 774-779.
9
[10] Haftbaradaran H, Shodja H., Elliptic In homogeneities and Inclusions in Anti-Plane Couple Stress Elasticity with Application to Nano-Composites, International journal of solids and structures, Vol. 46, 2009, pp. 2978-2987.
10
[11] Fleck N.A, Hutchinson J.W., Strain Gradient Plasticity, Advance applied mechanics, Vol. 33, 1997, pp.295-361.
11
[12] Yang F, Chong A. C. M, Lam D.C.C, Tong P., Couple Stress Based Strain Gradient Theory for Elasticity, International journal of solid structs, Vol. 39, 2002, pp. 2731-2743.
12
[13] Eringen A.C., Nonlocal Continuum Field Theories, New york, Springer-Verlag, 2002.
13
[14] Pradhan S.C., Murmu T., Small Scale Effect on the Buckling of Single-Layered Graphene Sheets under Biaxial Compression via Nonlocal Continuum Mechanics, Computational materials science, Vol. 47, 2009, pp. 268-274.
14
[15] Boehm H.P., Clauss A., Fischer G. O and Hofmann U., Das Adsorptions Verhalten Sehr Dünner Kohlenstof-ffolien, Zeitschrift für anorganische und allgemeine chemie, Vol. 316, 2004, pp. 119-127.
15
[16] Behfar K., Naghdabadi R., Nanoscale Vibrational Analysis of Multi-Layered Graphene Sheet Embedded in an Elastic Medium, Composites science and technology, Vol. 65, 2005, pp. 1159-1164.
16
[17] Kitipornchai S., He X. Q., Liew K. M., Continuum Model for the Vibration of Multilayered Graphene Sheets, Physical Review B, Vol. 72, 2005, pp. 1-7.
17
[18] Liew K.M., He X.Q., Kitipornchai S., Predicting Nanovibration of Multi-Layered Graphene Sheets Embedded in an Elastic Matrix, Acta materialia, Vol. 54, 2006, pp. 4229-4236.
18
[19] Duan W.H., Wang C.M., Exact Solutions for Axisymmetric Bending of Micro/Nanoscale Circular Plates Based on Nonlocal Plate Theory, Nanotechnology, Vol. 18, 2007, pp. 1-5.
19
[20] Pradhan S.C., Phadikar J.K., Small Scale Effect on Vibration of Embedded Multilayered Graphene Sheets Based on Nonlocal Continuum Models, Physics letters A, Vol. 373, 2009, pp. 1062-1069.
20
[21] Shen H., Shen L., Zhang, Chen-Li., Nonlocal Plate Model for Nonlinear Vibration of Single Layer Graphene Sheets in Thermal Environments, Computational materials science, Vol. 48, 2010, pp. 680-685.
21
[22] Jomehzadeh E., Saidi A. R., A Study on Large Amplitude Vibration of Multilayered Graphene Sheets, Computational materials science, Vol. 50, 2011, pp. 1043-1051.
22
[23] Mohammadi M., Ghayour M., Farajpour A., Free Transverse Vibration Analysis of Circular and Annular Graphene Sheets with Various Boundary Conditions Using the Nonlocal Continuum Plate Model, Composites, Vol. 45, 2013, pp. 32-42.
23
[24] Kerr A.D., An extension of the Kantorovich method, Q Appl Math, 26, 1968, pp. 219.
24
[25] Fereidoon A., Mohyeddin A., Sheikhi M., Rahmani H., Bending analysis of functionally graded annular sector plates by extended Kantorovich method, Composites Part B, Vol. 43, No.5, 2012, pp. 2172-2179.
25
[26] Aghdam M.M., Mohammadi M., Erfanian V., Bending analysis of thin annular sector plates using extended Kantorovich method, Thin Walled Structures, Vol. 45, No. 12, 2007, pp. 983-990.
26
[27] Salehi M., Turvery G.J., Elastic large deflection response of annular sector plates—a comparison of DR finite difference, finite element and other numerical solutions. composite structures, Vol. 40, No. 5, 1991, pp. 1267–78.
27
[28] Harik I.E., Analytical solution to orthotropic sector, Journal of Engineering Mechanics, 110, 1984, pp. 554-68.
28
[29] Cheung M.S., Chan M.Y.T., Static and dynamic analysis of thin and thick sectorial plates by the finite strip method, composite structures, Vol. 14, No.1-2, 1981, pp. 79-88.
29
[30] M. E. Golmakani, J. Rezatalab, Nonlinear bending analysis of orthotropic nanoscale plates in an elastic matrix based on nonlocal continuum mechanics, composite structures, Vol. 111, 2014, pp. 85-97.
30
ORIGINAL_ARTICLE
Fluidity Onset Analysis in FG Thick-Walled Spherical Tanks under Concurrent Pressure Loading and Heat Gradient
In this paper,fluidity onset analysis in FG thick-walled spherical tanks under concurrent pressure loading and heat gradient has been presented. Designing thick-walled spherical tanks under pressure as tanks holding fluids under heat loads with high heat gradients require new approaches. Under high internal pressure and high temperature, the tank enters the plastic stage in a part of its thickness; hence, for designing, a tank, which necessitates the onset of fluidity, is required for pressure study and heat gradient. Elasticity module, tensile yield, heat flow coefficient and heat expansion coefficient change gradually and, according to the power model, along radial direction. In order to describe the material behavior in the plastic area in the FG thick-walled spherical tank under internal pressure and heat gradient, Treska yield index has been used, and materials’ behavior has been assumed to be in elastic-plastic form.
http://jsme.iaukhsh.ac.ir/article_515979_b54159e64604d830a76c851e3d18f7f3.pdf
2014-12-22
57
49
Fluidity onset
FG thick-walled sphere
Concurrent loading
Pressure loading and heat gradient
M.
Askari
1
- MSc Student, Department of Mechanical Engineering, Science & Research Branch, Islamic Azad University, Tehran, Iran
AUTHOR
A.
Parvizi
aliparvizi@ut.ac.ir
2
Assistant Prof., Department of Mechanical Engineering, Tehran University, Tehran, Iran
LEAD_AUTHOR
Sh.
Ali Karami
3
MSc Student, Department of Mechanical Engineering, Science & Research Branch, Islamic Azad University, Tehran, Iran.
AUTHOR
[1] ملک زاده فرد، کرامت و نظری، علی ، تحلیل ورقها و پوستههای هدفمند تابعی، انتشارات الماس البرز، 1392، کرج.
1
[2] MendelsonA., Plasticity Theory and ApplicationNew York: The Macmillan Company, 1968.
2
[3] BoleyB.A., WeinerJ.H., International Journal of Thermal Stresses, New York, Wiley, 1960
3
[4] Whalley E., The Design of Pressure Vessels Subjected to Thermal Stress, Review, International Journal of Mechanical Sciences,1960,pp. 379-395.
4
[5] CowperJ.R., The elastopastic thick-walled sphere subjected to a radial temperature gradient, Transaction of the ASME, 1960
5
[6] DerringtonM.G., JohnsonW., The onset of yield in a thick spherical shell subject to internal pressure and a uniform heat flow, Applied Science Research Series A, Vol. 7, 1958,pp. 408-414.
6
[7]-TanigawaY., Some basic thermoplastic problems for nonhomogeneous structural Materials, Applied Mechanics Reviews, Vol. 48, 1995,pp. 377-389.
7
[8] ObataY., NodaN., Steady thermal stresses in a hollow circular cylinder and hollow sphere of functionally gradient material,International Journal of Thermal Stresses, Vol. 7, No. 17, 1994,pp. 471-488.
8
[9] TutuncuN. andOzturkM., Exact solution for stresses in functionally graded pressure vessels,Composites: Part B (Engineering), Vol. 32,2001,pp. 683-686.
9
[10] Rodrı´guez-CastroR.,Wetherhold R.C.,KelestemurM.H., Microstructurand mechanical behavior of functionally graded Al A359/SiCp composite,Materials Science and Engineering, A, Vol. 323, 2002, pp. 445-456.
10
[11] Parvizi A., Naghdabadi R., ArghavaniJ., Analysis of Al A359/SiCp Functionally Graded Cylinder Subjected to Internal Pressure and Temperature Gradient with Elastic-Plastic Deformation, International Journal of Thermal Stresses, Vol. 34, No. 10,20111054-1070.
11
[12] NayebiA., SadrabadiS.A., FGM Elastoplastic analysis under thermo mechanical loading, International Journal of Pressure Vessels and Piping, 2013.
12
ORIGINAL_ARTICLE
Numerical and Experimental Analysis of Forming Rectangular Copper Pipes by Successive Rolling of Round Pipe Filled With Bismuth
Because of their wide application in industries requiring high pressure and temperature, manufacturing square and rectangular pipes have attracted more attention than ever before. There are various methods such as extrusion, tensile and stress for manufacturing square pipes. Another method on which studies have focused in recent years is the re-forming of round pipes in order to turn them into square or rectangular ones. The methods suggested in these researches are all applicable for the manufacture of square pipes without the possibility of manufacturing rectangular pipes. The method introduced in this paper consists of filling the pipe with bismuth and rolling it in three successive stages. In this research, first, the intended process is simulated in Abaqus software, and then a real sample is manufactured by an experimental test. The manufactured sample is checked with regard to its dimensions and is compared with the results obtained from the simulation. The results of the study show that the method of filling the pipe with bismuth and moving it through three rollers is an appropriate method for the manufacture of thin-walled pipes with rectangular cross-section.
http://jsme.iaukhsh.ac.ir/article_515981_e948dc764e2308331c66fb12ea03b774.pdf
2014-12-22
57
65
Rolling forming
Rectangular pipes
Cold Rolling
Re-forming pipes
Finite elements method
A.
Basiratnia
1
MSc Student, Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
AUTHOR
M.
Loh-Mousavi
loh-mousavi@iaukhsh.ac.ir
2
Assistant Prof., Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran
LEAD_AUTHOR
[1] Kiuchi M, Shintani K, Tozawa M., Investigation into forming process of square pipe experimental study on roll forming process of noncircular pipe II, Journal of the Japan Society for Technology of Plasticity, 21/228, 1980, pp.73–80 [in Japanese].
1
[2] Kiuchi M., Overall study on roll forming process of square and rectangular pipes, In: Proceedings of the second international conference on rotary metalworking process, Straford Upon_Avon, 1982, pp. 213–26.
2
[3] Wen B., Using advanced tooling designs to reshape round tube into square and rectangular tubes, OH, USA: Roll-Kraft, Inc.
3
[4] Onoda Y., Nagamachi T., Kimura S., Effects of forming conditions on cross-sectional shapes of corner zones of square and rectangular steel pipes formed by extroll-forming process, Journal of the Japan Society for Technology of Plasticity, 3 ,1992, pp.573–578. (in Japanese).
4
[5] Onoda Y, Nagamachi T, Kimura S, Kitawaki T., Pushing load acting on ram and forming load acting on the idle rolls in extroll-forming mill for reshaping round welded steel pipes into square and rectangular shapes, Journal of the Japan Society for Technology of Plasticity,42, No.476, 1993, pp.478.
5
[6] Bayoumi, Laila S., Cold drawing of regular polygonal tubular sections from round tubes, International Journal of Mechanical Sciences, 43, 2001, pp. 2541–2553.
6
[7] Moslemi Naeni H., Kiuchi M., Kitawaki T., Kuromatsu R., Design method of rolls for reshaping processes of pipes with pentagonal cross-sections, Journal of Materials Processing Technology, 169, 2005, pp. 5–8.
7
[8] Leu D.K., Wu J.Y., Finite element simulation of the squaring of circular tube, International Journal of Advanced Manufacturing Technology, Vol. 25, 2005, pp. 691–699.
8
[9] Leu D.K., Finite-element simulation of the lateral compression of aluminum tube between rigid plates, International Journal of Mechanical Sciences, Vol. 41, 1999, pp. 621-638.
9
[10] Leu D.K., The shaping of a circular tube into a symmetric square-tube by finite-element modeling, Journal of Materials Processing Technology, Vol. 178, 2006, pp.287–296.
10
[11] Hwang Y.M., Elasto-plastic finite element analysis of squaring circular tube, Journal of Transactions of Nonferrous Metals Society of China, Vol. 18, 2008, pp.665-673.
11
[12] Bayoumi L., Attia A.S., Determination of the forming tool load in plastic shaping of a round tube into a square tubular section, Journal of Materials Processing Technology, Vol. 209, 2009, pp. 1835-1842.
12
[13] Abrinia K., Farahmand H.R., An upper bound analysis for the reshaping of thick tubes with experimental verification, International Journal of Mechanical Sciences, 2007, pp. 342-358.
13
[14] ابرینیا ک. ، تاجیار ع. ، تاثیر پارامترهای مختلف بر روی نیروی جداشونده در شکل دهی مجدد لوله گرد، دهمین کنفرانس مهندسی ساخت و تولید ایران، ICME 2010، دانشگاه صنعتی نوشیروانی بابل.
14
ORIGINAL_ARTICLE
Simulation of Human Foot Mechanism with a Degree of Freedom Motion
The need for simulation of human foot mechanism has made researchers and engineers move towards different patterns to describe this movement. In this regard, optimal solutions such as energy consumption, accuracy, etc. are of utmost importance. In this paper, efforts have been made to present a new solution by designing a fully two-dimensional six-bar mechanism with one degree of freedom so that it has the least error with regard to human foot while walking. Meanwhile, the findings of this paper present a process for the optimization of multi-bar mechanisms so that they can be employed in any other field such as making human foot prosthesis. Here, the particle swarm optimization algorithm was used. The results from the optimization were compared with experimental data regarding human feet. The results show that while optimizing many motor parameters, the proposed six-bar mechanism is able to simulate the movement of the human foot very well.
http://jsme.iaukhsh.ac.ir/article_515983_75a367c67ea174c153d5d19a28b9979e.pdf
2014-12-22
75
65
Human foot biomechanics
Inactive dynamics
Six-bar mechanism
particle swarm optimization algorithm
Kinematic analysis
D.
Bakhtiarian
1
MSc Student, Department of Mechanical Engineering, Shahrekourd University, Iran
AUTHOR
H.
Homaei
hadi-h@eng.sku.ac.ir
2
Associate Prof., Department of Mechanical Engineering, Shahrekourd University, Iran.
LEAD_AUTHOR
A.
Malekizadeh
3
PhD Student, Department of Mechanical Engineering, Amir Kabir University, Tehran, Iran
AUTHOR
M.
Shahbazi Tak-Abi
4
MSc Eng., Department of Mechanical Engineering, Amir Kabir University, Tehran, Iran
AUTHOR
[1] Batayneh, W., Al-Araidah, O., Mattson, C.A., Ismail-Yahaya A., Design and Implementation of Human-Like Biped Walking Mechanism. The Third International Conference in Mechatronics, Kuala Lumpur, Malaysia, 2008.
1
[2] Cavanagh PR.,The mechanics of distance running: a historical perspective, Champaign, IL, Human Kinetics Publishers; Chapter 1, 1990, pp.1–34.
2
[3] Rose J., Gamble J.G., Human Walking, 3rd Edition, Lippincott Williams & Wilkins, 2006.
3
[4] Hobson D.A., Torfason L.E., Optimization of four-bar knee mechanisms – A computerized approach, Journal of Biomechanics, Vol. 7, No. 4, 1974, pp. 371–376.
4
[5] Sangwan V., Taneja A., Mukherjee S., Design of a robust self-excited biped walking mechanism, Mechanism and Machine Theory, Vol. 39, 2004, pp. 1385–1397.
5
[6] Collins S.H., Ruina A.L., Tedrake R., Wisse M., Efficient bipedal robots based on passive passivedynamic Walkers. Science magazine, Vol. 307, 2005, pp. 1082-1085.
6
[7] McGeer T., Passive dynamic walking. International Journal of Robotics Research, Vol. 9, No. 2, 1990, pp. 62-82.
7
[8] Neumann D.A., Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation, 2nd Edition, 2010.
8
[9] L.D.S. Coelho, A quantum particle swarm optimizer with chaotic mutation operator，Chaos, Solitons and Fractals，Vol. 37，No. 5, 2008, pp. 1409- 1418.
9
[10] Poli R., Kennedy, J., Blackwell, T., Particle swarm optimization An overview, s.l.，Springer Science，2007,pp. 33–57，Swarm Intell．
10
ORIGINAL_ARTICLE
Buckling Analysis of Cylindrical Grooved Shell under Axial Load Discs
In this paper, buckling of cylindrical grooved shells under axial load has been examined by theoretical and experimental methods. The shell is made of USA/API – X42 5L steel standards. This material is one of the most common materials used in gas, oil and petrochemical industries. The effect of spiral grooves on cylindrical shell was analyzed, and the results obtained from the Abaqus software were compared with experimental results. Theoretical and experimental results were in good agreement. Hence, the numerical results can be used as well. It was also found that the number of grooves on the critical buckling load has an important role so that the critical buckling load decreases with an increase in critical load groove.
http://jsme.iaukhsh.ac.ir/article_515985_4a15646ba938d290e95816a5849d0ee5.pdf
2014-12-22
83
75
Buckling
Cylindrical shell
Spiral groove
critical load
A.
Rahmatnezhad
1
MSc Student, Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, Iran.
AUTHOR
S.M.M.
Najafizadeh
m-najafizadeh@iau-arak.ac.ir
2
Associate Prof., Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, Iran
LEAD_AUTHOR
H.
MohseniMonfared
3
Associate Prof., Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, Iran
AUTHOR
[1] Mirzavand B.E., Slami M.R.,2013, Thermal buckling of imperfect functionally graded cylindrical shells based on the wan-donnell model, Thermal Stresses Journal, Vol. 29, 2006, pp.37-55.
1
[2] Hui-ShenShen,Noda N.,Postbuckling of FGM cylindrical shells under combined axial and radial mechanical loads in thermal environments, InternationalJournal of Solids and Structures, Vol. 42, 2005, pp. 4641-4662.
2
[3] Nguyen Thi.P., Dao Huy B., Buckling analysis of eccentrically stiffened functionally graded circular cylindrical thin shells under mechanical load,VNU Journal of Mathematics, Physics, Vol. 29, No. 2, 2013, pp. 55-72.
3
[4] Darvizeh M., Darvizeh A., Shaterzadeh A.R., Ansari R., Thermal Buckling Analysis of Moderately Thick Composite Cylindrical Shells under Axisymmetric Thermal Loading.,Journal of Mechanics& Aerospace Engineering, Vol. 3, No. 2,2007, pp.99-107.
4
]5[ شریعتی م.، حاتمی ح.، ایپکچی ح.، تاثیر کمانش بر رفتار منحنی های هیسترزیس پوسته های استوانه ای، دوازدهمین کنفرانس انجمن هوافضای ایران، تهران، دانشگاه صنعتی امیرکبیر، 1391.
5
]6[ شرعیات م.، یاقوتیان.، کمانش استاتیکی پوسته های استوانه ای پیزوالکتریک بر پایه نظریه مرتبه بالاتر، فصل نامه علمی و پژوهشی شریف، 1386، شماره چهلم،ص93-100.
6
]7[ حسینی م.،شرعیات م.، تحلیل کمانشی پیچشی میل گاردان کامپوزیتی خودروبر اساس تئوری مرتبه بالا با در نظر گرفتن تغییر شکل اولیه،مجله پژوهش و کاربرد در مکانیک، سال اول، شماره اول ، بهار 1388، ص39-44.
7
[8] Brush D.O, Almorth B.O., Buckling of Bars, Plate and Shells,McGraw-Hill, 1975, pp. 142-190.
8