ORIGINAL_ARTICLE
An Initiative Plan of the Equivalent Model for Simulation of the
Welding Process
Many researchers content themselves with the 2D simulation of welding process instead of the 3D simulation, because of the time and the cost factors of the latter. In this research, the number of elements and nodes are reduced by an initiative plan (defining an equivalent model) for the simulation of welding. The welding process has been simulated by an uncoupled thermal-mechanical finite element model in three steps. Thermal history was determined from thermal analysis, and then the distribution of the metallurgical phase on the fusion and heat affected zones were calculated by a certain code. Afterward, the stress distribution was computed from mechanical analysis, where the material property was defined element by element according to the second step. One of the most important objectives of this simulation is to study the residual stresses of welding. Comparisons between the thermal analysis results and the metallographic and laboratory results of this research show acceptable accuracy of the proposed method.
http://jsme.iaukhsh.ac.ir/article_515514_ad73cd933271ed606e75e9ae6776282e.pdf
2008-09-22
1
16
Welding Process
Finite Element Method
Equivalent Model
Residual stress
Ali
Heidari
heidari@iaukhsh.ac.ir
1
- Lecturer, Mechanical Engineering Faculty, Islamic Azad University, Khomeinishahr Branch
LEAD_AUTHOR
Mohammad Reza
Forouzan
forouzan@cc.iut.ac.ir
2
Assistant Professor, Mechanical Engineering Faculty, Isfahan University of Technology
AUTHOR
Jafar
Golestaneh
3
M.Sc., Sadid Pipe and Equipment Co., Tehran
AUTHOR
[1] Taljat, B., Radhakrishnan, B., Zacharia, T., Numerical Analysis of GTA Welding Process with emphasis on Post-Solidification Phase Transforma-tion effects on Residual Stresses, Materials Science and Engineering, Vol. A246, 1998, pp. 45–54.
1
[2] Mackerle, J., Finite Element Analysis and Simulation of Welding: a Bibliography (1976-1996), Modeling and Simulation in Materials Science and Engineering, Vol. 4, 1996, pp. 501-533.
2
[3] Mackerle, J., Finite Element Analysis and Simulation of Welding-an Addendum: a Bibliography (1996-2001), Modeling and Simulation in Materials Science and Engineering, Vol. 10, 2002, pp. 295-318.
3
[4] Andersson, B. A. B., Thermal Stresses in a Submerged-Arc Welded Joint Considering Phase Transformations, Transactions of the ASME, Vol. 100, 1978, pp. 356-362.
4
[5] Goldak, J., Chakravarti, A., Bibby, M., A new finite element model for welding heat sources, Metallurgical Transactions B, Vol. 15B, 1984, pp. 299-305.
5
[6] Roelens, J.B., Numerical simulation of some multipass submerged arc welding determination of the residual stresses and comparison with experimental measurements, Welding in the world, Vol.35, No.2, 1995, pp. 17-24.
6
[7] Wen, S. W., Hilton, P., Farrugia, D. C. J., Finite Element Modeling of a Submerged Arc Welding Process, Journal of Materials Processing Technology, Vol. 119, 2001, pp. 203-209.
7
[8] Cho, S. H., Kim, J. W., Analysis of Residual Stress in Carbon Steel Weldment incorporating Phase Transformations, Science and Technology of Welding and Joining, Vol. 7, No. 4, 2002, pp. 212-216.
8
[9] Chang P. H., Teng, T. L., Numerical and Experimental Investigations on the Residual Stresses of the Butt-Welded Joints, Computational Materials Science, Vol. 29, 2004, pp. 511–522.
9
[10] Yajiang, L., Juan, W., Maoai, C., Xiaoqin, S., Finite Element Analysis of Residual Stress in the Welded Zone of a High Strength Steel, Bull. Mater. Sci., Vol. 27, No. 2, 2004, pp. 127–132.
10
[11] حیدری، ع.، شبیهسازی ترکیبی فرایندهای جوشکاری، هایدروتست و کوئنچینگ لولهها به منظور بررسی تنشهای پسماند به کمک روش اجزاء محدود، پایان نامه کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه صنعتی اصفهان، 1385.
11
[12] Gery, D., Long, H., Maropoulos, P., Effects of Welding Speed, Energy Input and Heat Source Distribution on Temperature Variations in Butt Joint Welding, Journal of Materials Processing Technology, 2005.
12
[13] Rammerstorfer, F.G., Fisher, D.F., On Thermo-Elastic-Plastic Analysis of Heat-Treatment Process Including Creep and Phase Changes, Computers and Structures, Vol. 13, 1981, pp. 771-779.
13
[14] Lundback, A., CAD-support for heat input in FE-model, Computer Aided Design, Lulea University of Technology, Sweden, 2003.
14
[15] Alberg, H., Material modeling for simulation of heat treatment, Division of Computer Aided Design, M.S. Thesis, Lulea University of Technology, 2003.
15
[16] Kamamato, S., Nihimori, T., Kinoshita S., Analysis of Residual Stress and Distortion Resulting from Quenching in Large low-alloy Steel Shafts, Journal of Mechanical Science and Technology, 1985, pp.798-804.
16
ORIGINAL_ARTICLE
Static Deflection of Hinged-Hinged piezoelectric Multilayer Beam Under Different Loading Conditions
In this paper at first introduced constituent equations for piezoelectric and then by the help of this equations, internal energy of hinged-hinged piezoelectric multilayer beam was computed. Then by the principle of minimum potential energy and Rayleigh -Ritz method the bending curvature equation of hinged-hinged piezoelectric multilayer beam under concentrated moment, concentrated force, uniform pressure load and applied electrical voltage with satisfaction of boundary conditions are guessed. Unknown coefficients are determined by the principle of minimum potential energy. Thereinafter obtained equations have simplified for hinged-hinged unimorph and bimorph beam. Electrical load and voltage produced in unimorph and bimorph beam as sensor are calculated. In order to verify the derived equations for a hinged-hinged piezoelectric multilayer bending beam, the analytical calculation compared with ANSYS 10 results by some finite element examples.
http://jsme.iaukhsh.ac.ir/article_515517_90699bdd59bbbbf40d6e5f129df62b7f.pdf
2008-09-22
17
26
Piezoelectric
Multilayer beam
Constituent equations
Bimorph
Unimorph
Afshin
Manouchehrifar
manouchehri@iaukhsh.ac.ir
1
Assistant Professor, Mechanical Engineering Faculty, Islamic Azad University, Khomeinishahr Branch
LEAD_AUTHOR
Alireza
Jalili
2
M.Sc., Mechanical Engineering Faculty, Islamic Azad University, Khomeinishahr Branch
AUTHOR
[1] Reza Moheimani S.O., Fleming A.J., Piezoelectric transducers for vibration control and damping. - (Advances in industrial control), Springer-Verlag London Limited, UK, 2006.
1
[2] Gordan T.L., Ounaies Z., Piezoelectric Ceramics Characterization, ICASE Report, NO.28, 2001. [3] Park J.K., Moon W.K., Constitutive Relations for Piezoelectric Benders Under Various Boundary Conditions, Journal Sensors and Actuator A: Physical, volume 117, 2005, pp. 159-167.
2
[4] Smits J.G., Choi W., The Constituent Equations of Piezoelectric Heterogeneous Bimorphs, IEEE Transactions on Ultrasonic, Ferroelectrics, and Frequency Control, Volume 38, No.3, 1991.
3
[5] Yocum M., Abramovich H., Static Behavior of Piezoelectric Actuated Beams, Computers & Structures, Volume 80, Number 23, 2002, pp. 1797-1808
4
[6] Fernandes A., Pouget J., Analytical and numerical approaches to piezoelectric bimorph, International Journal of Solid and Structures, Volume 40, 2003, pp. 4331- 4352.
5
[7] Balls R.G., Schlaak H.F., Schmid A.J., The Constituent Equations of Piezoelectric Multilayer Bending Actuators in Closed Analytical Form and Experimental Results, Journal Sensors &Actuators .A: Physical, 2006, pp. 1-7.
6
[8] Yang J., An Introduction to The Theory of Piezoelectricity, Department of Engineering Mechanics University of Nebraska-Lincoln, U.S.A. , 2005.
7
ORIGINAL_ARTICLE
Bending Analysis of Rectangular FGM Plates based on the Extended Kantorovich Method
Bending analysis of FGM plates under uniform and sinusoidal loaded result in forth order partial differential equation. In this paper the analytical solution is based on the extended Kantorovich iterative procedure. The differential equations for the iterative procedure is derived using the Galerkin method. The solution was develope based on the classical plate’s theory (CLPT). The reliability of the present analytical method for FGM, under different boundary condition, was verified and approved when comparing Navier solution and finite element results with ANSYS solution. Since the FGM modeling is impossibility at ANSYS, a macro has used for modeling and analysis.The results show a high accuracy and the iterative process converges very rapidly. It was also found that the final form of the generated solutions is independent of the initial trial function.
http://jsme.iaukhsh.ac.ir/article_515520_69880d490a4768a7ffa104565ebcb1aa.pdf
2008-09-22
27
38
Extended Kantorovich method
FGM plate
Galerkin Method
Classical plate’s theory
Mohammad Mahdy
Najafizadeh
m-najafizadeh@iau-arak.ac.ir
1
Associate Professor, Mechanical Engineering Dept., Islamic Azad University, Arak Branch
LEAD_AUTHOR
Majid
Alavi
2
Assistant Professor, Mathematical Dept., Islamic Azad University, Arak Branch
AUTHOR
Foad
Salmasi
3
M.Sc., Mechanical Engineering Dept.,Islamic Azad University, Arak Branch
AUTHOR
Shima
Azari
4
M.Sc., Mechanical Engineering Dept., Islamic Azad University, Arak Branch
AUTHOR
[1] Grimm T.R., Analysis of the instability of rectangular plate using the doctoral dissertation Extende Kontorovich method, Unpoblished, Michigan – Technologocal University, 1972.
1
[2] Kantorovich L.V., krylor L.V., Approximate method of Higher Analysis, Interscience, NewYork, 1958.
2
[3] Kerr AD, An extension of the Kantorovich method, Quart Appl Math, Vol.26, 1968, pp.219–229.
3
[4] Reddy J.N., Energy and variational method in applied mechanics, 2002, pp.328-341.
4
[5] Fariborz SJ, Pourbohloul A, Application of the extended Kantorovich method to the bending of variable thickness plates, Comput Struct, Vol.31, 1989, pp.957–965.
5
[6] Aghdam MM, Shakeri M, Fariborz ,SJ, Solution to the Reissner plate with clamped edges, ASCE J Eng Mech, Vol.122,1996, pp.679–682.
6
[7] Aghdam MM, Falahatgar SR, Bending analysis of thick laminated plates using extended Kantorovich method, Composite Structure, Vol.62, 2003, pp.279–83.
7
[8] Kerr AD, An extended Kantorovich method for the solution of eigenvalue problems, Int J Solids Struct, Vol.5, 1969, pp.559–72.
8
[9] Jones R., Milne BJ, Application of extended Kantorovich method to the vibration of clamped rectangular plates, J Sound Vib., Vol.45, 1976, pp.309–316.
9
[10] Dalaei M, Kerr AD, Application of extended Kantorovich method to the vibration of clamped rectangular plates, J. Sound Vib, 1996, Vol.189, pp.399-406.
10
[11] Yuan S, Jin Y, Computation of elastic buckling loads of rectangular thin plates using the extended Kantorovich method, Comput Struct 1998,Vol.66,pp.861–867.
11
[12] Ungbhakorn V, Singhatanadgid P, Buckling analysis of symmetrically laminated composite plates by the extended Kantorovich method, Compos Struct 2006,Vol.73,pp.120–128.
12
[13] Jana P, Bhaskar K , Stability analysis of simply-supported rectangular plates under non-uniform uni-axial compression using rigorous and approximate plane stress solutions, Thin-Walled Struct, Vol.44, 2006, pp.507–516.
13
[14] Kim H.S., Cho M. , Kim G.I., Free-edge strength analysis in composite laminates by the extended Kantorovich method, Composite Structures, Vol. 49, 2000, pp.229–235.
14
[15] Aghdam M.M., Mohammadi M., Erfanian V., Bending analysis of thin annular sector plates using extended Kantorovich method, Thin-Walled Struct, Vol.45, 2007, pp.983–990.
15
[16] Aghdam MM, Mohammadi M, Extended Kantorovich method for staticanalysis of thick orthotropic sector plates, Proceedings of theinternational conference on modeling and optimization of structures,processes and systems, ICMOSPS/07, Durban, South Africa, 2007.
16
[17] Abouhamze M , Aghdam ,MM , Alijani , F, Bending analysis of symmetrically laminated cylindrical panels using the extended Kantorovich method, MechAdv Mater Struct, Vol.14, 2007, pp.523–530.
17
[18] Liew KM, Xiang Y, Kitipornchai S, Analytical buckling solution for Mindlin plates involving free edges, Int J Mech Sci., Vo.39, 1996, pp. 1127–1138.
18
[19] Dalei M, Kerr AD, Analysis of clamped rectangular orthotropic plates subjected to uniform lateral load, Int J Mech Sci 1995,Vol.37,pp.527–535.
19
[20] Kerr AD, Alexander H, An application of the extended Kantorovich method to the stress analysis of a clamped rectangular plate, ActaMechanica, Vol.6,1968, pp.180–196.
20
[21] Lucy, Edery-Azulay, Haim, Abramovich, Piezo-laminated plates – Highly accurate solutions based on the extended Kantorovich method, 2007.
21
[22] Reddy, J.N., Theory and analysis of elastic plates, 1998, pp.238-250.
22
[23] Zhang , Da-Guang , Zhou , You-He , A theoretical analysis of FGM thin plates based on physical neutral surface, Computational Materials Science , 2008.
23
[24] Jones R.M., Mechanics of composite materials, 1984, pp.175-160.
24
[25] Lanhe Wu, Thermal buckling of a simply supported moderately thick rectangular FGM plate, Composite Structure, Vol. 64 , 2004, pp. 211-218.
25
ORIGINAL_ARTICLE
Finite Element Analysis of Safety Mechanism in a Mechanical Controller
In this study, dynamic behavior of safety mechanism of a mechanical controller is investigated using 3D-FE simulation. This paper is concentrated on controller of a high acceleration projectile. The controller is located in the top of the projectile. Safety mechanism is divided to deformable and rigid parts. Deformable and rigid parts are simulated in Abaqus and Adams commercial soft wares; respectively. The goal of this study is to investigate the safety mechanism operation includes plastic deformation of safety ring, rotor rotation and the required time for this operation. Also, some important parameters of safety mechanism such as, determination of required time and angular velocity for plastic deformation of safety ring, exit of safety pin, and the angular velocity correspondent to rotor rotation, when the axis of needle and guide hole are aligned, are studied.
http://jsme.iaukhsh.ac.ir/article_515525_6551ce926ac3fe7551c0d010af9b5e5f.pdf
2008-09-22
39
48
Safety Mechanism
Controller
3D-FE
Mehdi
Massah
1
M.Sc., Islamic Azad University, Khomeinishahr Branch.
AUTHOR
Kourosh
Hasanpur
2
Assistant Professor, Faculty of Engineering, Esfahan University
AUTHOR
Mehrdad
Poursina
poursina@iaukhsh.ac.ir
3
Assistant Professor, Faculty of Engineering, Islamic Azad University, Khomeinishahr Branch
LEAD_AUTHOR
Mehdi
Salmani Tehrani
tehrani-m@eng.sku.ac.ir
4
Assistant Professor, Faculty of Engineering, Shahrekord University.
AUTHOR
Masih
Sonbolestan
5
M.Sc., Department of Mechanical Engineering Faculty, Isfahan University of Technology
AUTHOR
[1] Ben-Dor G., Dubinsky A., Elperin T., Ballistic Impact: Recent Advances in Analytical Modeling of Plate Penetration Dynamics–a Review, Appl Mech Rev, 58, 2005, pp. 355–371.
1
Galanov B.A., Kartuzov V.V., Lyanov S.M., Numerical-Analytical Model of Penetration of Long Elastically Deformable Projectiles in to
2
ORIGINAL_ARTICLE
Propagation of Crack in Linear Elastic Materials with Considering
Crack Path Correction Factor
Modeling of crack propagation by a finite element method under mixed mode conditions is of prime importance in the fracture mechanics. This article describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. Crack - growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress criterion which is expressed in terms of the stress intensity factor. In this paper a procedure is employed to correct direction of crack propagation to ensure that a unique final crack path is achieved for different analysis of a problem by using different increments of crack. For each increment of crack extension, finite element method is applied to perform a single - region stress analysis of the cracked structure. Results of this incremental crack – extension analysis are presented for several geometries.
http://jsme.iaukhsh.ac.ir/article_515526_5663d63dd0f10a07c1d880313a0c31d5.pdf
2008-09-22
49
58
Finite Element
Crack propagation criteria
Crack propagation path
Crack path correction angle
M.
Moradi
moradi@cc.iut.ac.ir
1
Assistant Professor, Mechanical Engineering Department, Isfahan University of Technology
LEAD_AUTHOR
M.
Pourmahmoud
2
M.Sc., Mechanical Engineering Department, Isfahan University of Technology
AUTHOR
[1] Aliabadi M. H., Boundary element method, Queen mary, UK, 2002.
1
[2] Tracy D. M., Finite elements for determination of crack tip elastic stress intensity factors, Engineering Fracture Mechanics, Vol. 3, 1971, pp. 255-265.
2
[3] Fehl B. D., Truman K. Z., An evaluation of fracture mechanics quarter – point displacement techniques used for computing stress intensity factors, Engineering Structures, Vol. 21, 1999, pp. 406-415.
3
[4] Mahajan R. V., Ravi–Chandar K., An experimental investigation of mixed – mode fracture, International Journal of fracture, Vol. 41, 1989, pp.235-252.
4
[5] Rethore J., Gravouil A., Combescure A., A stable numerical scheme for the finite element simulation of dynamic crack propagation with remeshing, Comput. Methods Appl. Mech. Engg., Vol. 193, 2004, pp. 4493-4510,.
5
[6] Kaufman J. G., Moore R. L., Schilling P. E., Fracture toughness of structural aluminum alloys, Engineering Fracture Mechanics, Vol. 2, 1970, pp. 197-210,.
6
[7] Grigoriu M., Saif M. T. A., Borgi S., Ingraffea A. R., mixed mode fracture initiation and
7
trajectory prediction under random stresses, International Journal of fracture, Vol.45, 1990, pp. 19-34.
8
[8] Aliabadi M. H., Young A., Wen P.H., Crack growth analysis for malti – layerd airframe structures by boundary element method, Engineering Fracture Mechanics, Vol. 71, 2004, pp. 619-631.
9
[9] عباسی، ع، تحلیل مسائل ترک در محدوده الاستیک خطی به روش اجزا محدود با کمک نرمافزارANSYS، پایاننامه کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه صنعتی اصفهان، 1380.
10
[10] Reddy J. N., An introduction to the finite element method, Second Edition, McGraw–Hill, Inc., New York, 1993.
11
[11] Gdoutos E. E., problems of mixed mode crack propagation, Martinus Nijhoff, Netherlands, 1984.
12
[12] Gomez L. H. H., Meza I. S., Calderon, G. U., Balankin, A. S., Susarrey, O., Evaluation of crack initiation angle under mixed mode loading at diverse strain rates, Theoretical and Applied Fracture Mechanics, Vol. 42, 2004, pp. 53-61.
13
[13] Parton, V. Z., Morozov, E. M., Elastic – plastic fracture mechanics, Mir Publishers, 1978.
14
[14] Rashid M. M., The arbitrary local mesh replacement method: An alternative to remeshing for crack propagation analysis, Comput. Methods Appl. Mech. Eng., Vol.154, 1998, pp.133-150,.
15
[15] Bouchard P. O., Bay F., Chastel Y., Tovena I., Crack propagation modeling using an advanced remeshing technique, Comput. Methods Appl. Mech. Engg. Vol. 189, 2000, pp.732-742.
16
[16] Portela A., Aliabadi M. H., Rooke, D. P., Dual boundary element incremental analysis of crack propagation, Computers and structures, Vol. 46. No. 2, 1993, PP.237-247.
17
ORIGINAL_ARTICLE
Analyzing Effect of Friction on Spread and Budge
in Flat Rolling by FEM Method
In this research a final element model for simulating three dimensional deformation in rolling of flat product is modeling in ABAQUS and further developed to study the frictional effects on spread and bulge. To predict the magnitude of bulging , the rolling process is approximated by successive forging steps. The elongation or the average spread at each step from the previous calculations are used in the model. The theoretical results of the model is in a good agreement with the experimental values given by other investigation.
http://jsme.iaukhsh.ac.ir/article_515527_9c54f79a7610991d79512402a4c336c3.pdf
2008-09-22
59
68
Rolling
Friction
Budge
spread
forging
Mahmood
Salimi
salimi@cc.iut.ac.ir
1
Professor, Mechanical Engineering Department, University of Technology
LEAD_AUTHOR
Amin
Fazileh
2
M.Sc., Islamic Azad University, Khomeinishahr Branch, Mechanic department
AUTHOR
[1] Gokyu, I., Kihara, J. and Mae, Y., Lubrication in steel strip rolling, Technology of plasticity Society of Japan ,Vol. 20, December 1987, pp. 316-321.
1
[2] Kobayashi, S. and Oh, S. I., An Approximate Method for a Three Dimensional Analysis of Rolling, International Journal of Mechanics Science, Vol. 17, 1975, pp. 293-305.
2
[3] Kennedy, K.F., A Method for Analyzing Spread, Elongation and Bulge in Flat Rolling, Transaction ASME Journal of Engineering Industry, Vol.11, 1987, pp. 305.
3
[4] Hill, R, A general method of analysis for metal-working processes, Journal of the Mechanics and Physics of Solids, Vol.11, September 1963, pp. 306-326.
4
[5] Min WANG, He YANG, Zhi-chao SUN, Liang-gang GUO and Xin-zhe OU, Research on the influence of material properties on cold ring rolling processes by 3D-FE numerical simulation,Transactions of Nonferrous Metals Society of China, Vol 16, December 2006, pp. 1274-1280
5
[6] Lanyun Li, He Yang, Lianggang Guo and Zhichao Sun, A control method of guide rolls in 3D-FE simulation of ring rolling, Journal of Materials Processing Technology, Vol205, Issues 1-3, 26 August 2008, pp. 99-110.
6
[7] Kobayashi, S. and Oh,S. I., An Approximate Method for a Three Dimensional Analysis of Rolling, International Journal of Mechanics Science , Vol. 17, 1975, pp. 293-305.
7
]8[ فضیله، الف، شبیه سازی اثر اصطکاک بر تعریض و برآمدگی جانبی در نورد تخت بوسیله نرم افزار ABAQUS، پایان نامه کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه آزاد خمینی شهر، 1387.
8
]9[ سلیمی، م، صنیعی، م، بررسی فرایند نورد سرد همراه با روغنکاری تحت رژیم روانکاری مخلوط، پایان نامه کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه صنعتی اصفهان.
9
]10[ مشکسار، م،کتاب اصول مهندسی نورد، انتشارات دانشگاه شیراز، 1381.
10
ORIGINAL_ARTICLE
Fatigue Failure and Damage Analysis of an Anti-roll Bar Subjected
to Fatigue Experiments
The available fatigue theories have been examined using simple specimens subjected to bending or tension-compression loads. Therefore, the stress fields have been generally one or two dimensional. Anti-roll bar is a component belongs to the suspension system of the vehicles. In spite of having simple circular section, due to the having several curvatures, this component experiences a three-dimensional stress field. This component is usually under alternating bending and torsion loads and the fatigue phenomenon is the main cause of its breakage and failure. In the present paper, employing the finite element method and the prepared computer code, the accumulated fatigue damage analysis of the mentioned component is accomplished based on the modified version of the well-known critical plane- type theories for three-dimensional stress fields. Results of the proposed theories are compared with the experimental fatigue results.
http://jsme.iaukhsh.ac.ir/article_515528_f68146bdaff00dcfa2b5be3668eacf5b.pdf
2008-09-22
69
76
Anti-roll bar
Accumulated Damage
High cycle fatigue
Critical plane
Random loading
multi-axial loading
M.
Shariyat
shariyat@kntu.ac.ir
1
Associate Professor, Faculty of Mechanical Engineering, K.N. Toosi University of Iran.
LEAD_AUTHOR
A.
Ganjidoust
2
M.Sc. Faculty of Mechanical Engineering, K.N. Toosi University of Iran
AUTHOR
[1] Findley W.N., A theory for the effect of mean stress on fatigue of metals under combined torsion and axial load or bending, J. Eng. Ind., Trans ASME, Vol. 81, Issue 4, 1959, pp. 301–306.
1
[2] Matake T., An explanation on fatigue limit under combined stress, Bull JSME, Vol. 20, 1977, pp. 257-263.
2
[3] McDiarmid D.L., Fatigue under out-of-phase bending and torsion, Fatigue Engng Mater Struct, Vol. 9, Issue 6, 1987, pp. 457–475.
3
[4] McDiarmid D.L, A General Criterion for High Cycle Multiaxial Fatigue Failure, Fatigue and Fracture of Engineering Materials and Structures, Vol. 14, Issue 4, 1991, pp. 429-453.
4
[5] McDiarmid D.L., A Shear Stress Based Critical-Plane Criterion of Multiaxial fatigue for Design and Life Prediction, Fatigue and Fracture of Engineering Materials and Structures, Vol. 17, Issue 12, 1994, pp. 1475-1485.
5
[6] Carpinteri A., Brighentri R., Spagnoli A., A fracture plane approach in multiaxial high-cycle fatigue of metals, Fatigue Fract. Eng. Mater. Struct, Vol. 23, 2000, pp. 355-364.
6
[7] Carpinteri A., Spagnoli A., Multiaxial high-cycle fatigue criterion for hard metals, Int. J. Fatigue, Vol. 23, 2001, pp. 135-145.
7
[8] Papadopoulos IV, Davoli P, Gorla C., Filippini M., Bernasconi A., A comparative study of multiaxial high-cycle fatigue criteria for metals, Int. J. Fatigue, Vol. 19, Issue 3, 1997, pp. 219–235.
8
[9] Wang Y.Y., Yao W.X., Evaluation and comparison of several multiaxial fatigue criteria, Int. J. Fatigue, Vol. 26, Issue 1, 2004, pp.17-25.
9
[10] Shariyat M., A fatigue model developed by modification of Gough’s theory, for random non-proportional loading conditions and three dimensional stress fields, Int. J. fatigue, Vol. 30, 2008, pp. 1248-1258.
10
[11] Shiegly G., Mechanical engineering design. McGraw-Hill, 7th Edition, 2003.
11
[12] شرعیات م.، اصول طراحی و تحلیل سازه و بدنه خودرو، انتشارات دانشگاه صنعتی خواجه نصیر الدین طوسی، 1388.
12
ORIGINAL_ARTICLE
Path Planning of a 3 DOF Servo-Hydraulic Mechanism Using
Genetic Algorithm
The objective of this paper is path planning of a 3 DOF planer robot with hydraulic actuator using genetic algorithm. First the geometric and kinematic parameters of robot were established. The equations of motion are derived by Lagrange method. We proposed the model for proportional valve and hydraulic actuators. Then using the genetic algorithm we minimized the hydraulic energy consumption as a fitness function during the mechanism motion between two specified points.
http://jsme.iaukhsh.ac.ir/article_515537_b3d5d296aa4352978142bd3f6d087ecb.pdf
2008-09-22
77
86
Path planning
Genetic Algorithm
Hydraulics
Servo Mechanism
Farshid
Agha Davoudi
davoodi@iaukhsh.ac.ir
1
Lecturer, Mechanical Engineering Faculty, Islamic Azad University, Khomeinishahr Branch.
LEAD_AUTHOR
Shahram
Lenjan Nejadian
sh.lenjani@spr.ui.ac.ir
2
Assistant Professor, Isfahan University.
AUTHOR
[1] McCall J., Genetic algorithms for modeling and optimization, Journal of computational and applied mathematics, Vol. 184, 2005, pp. 205-222.
1
[2] Holland J.H., Adaptation in natural and artificial systems, University of Michigan Press, 1975.
2
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