A New Strain Based Model for Predicting Multiaxial Fatigue Life of Metals

Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering

مقاله 3، دوره 4، شماره 1، آذر 2011، صفحه 17-25   

نوع مقاله: Persian

نویسندگان

Rahmat-Allah Ghajar^{* 1}؛ Safa Peyman²؛ Javad Alizadeh K³

¹Professor, Mechanical Engineering Department, K. N. Toosi University of Technology

²- Ph.D. Student, Mechanical Engineering Department, K. N. Toosi University of Technology

³Ph.D. Student, Mechanical Engineering Department, K. N. Toosi University of Technology

چکیده

Engineering structures are usually exposed to cyclic multiaxial loading and subsequently to multiaxial fatigue. Different models and criteria with various capabilities have been proposed for predicting of multiaxial fatigue life. Selection of proper model by considering material, type of loading and operation condition of each engineering structure is a challenging issue of the life prediction process. In this paper, capability of some critical strain-based models for predicting the fatigue life are evaluated and compared. Then, based on the advantages and disadvantages of the investigated models, a new model is presented. In this study, experimental fatigue data for SNCM630 samples under axial-torsional loading are used which is available in the literature. Results are compared to experimental data in order to validate the accuracy and capability of the new model in prediction of the fatigue life.

کلیدواژه‌ها

Multiaxial fatigue؛ Fatigue Life؛ Strain-based model؛ Critical plane-based mode

مراجع

[1] Socie D. F. ,Marquis G. B., Multiaxial Fatigue, 1^st ed., SAE,2000.

[2] Han C., Chen X. , Kim K. S., Evaluation of multiaxial fatigue criteria under irregular loading, Int. J. of Fatigue, 24 (9), 2002, pp. 913-922.

[3] Brown M., Miller K. A theory for fatigue failure under multiaxial stress-strain conditions, Proceedings of Institute of Mechanical Engineers, Vol. 187, 1973,pp. 745-756.

[4] Fatemi A. ,Socie D. F., A critical plane approach to multiaxial fatigue damage including out-of-phase loading, Fatigue and Fracture of Engineering Materials and Structures, 11 (3), 1988, pp. 449-466.

[5] Smith R. N., Watson P., Topper T. H., A stress strain parameter for the fatigue of metal, Journal of Materials, 5 (4), 1970, pp. 767-778.

[6] Liu K. C., A method based on virtual strain-energy parameters for multiaxial fatigue life prediction, ASTM STP 1191, American Society for Testing and Materials, 1993, pp. 67-84.

 

[7] Chu C. C., Conle F. A. ,  Bonnen, J. F.,. Multiaxial stress-strain modeling and fatigue life prediction of SAE axel shaf, ASTM STP 1191, American Society for Testing and Materials, 1993, pp. 37-54.

[8] Glinka G., Wang G., Plumtree A., Mean stress effects in multiaxial fatigue, Fatigue and Fracture of Engineering Materials and Structures, 18 (7/8), 1995,pp. 755-764.

[9] Dowling N. E., Mechanical behavior of materials, 3^st ed., Prentice Hall. 2006.