Full Article - Open Access.

Idioma principal


Liu, Z. F.; Gu, L. X.; Xu, Z. Y.;

Full Article:

Almost all load bearing components usually experience variable amplitude loading (VAL) rather than constant amplitude loading (CAL) during their service lives. Although many models have been proposed on this subject, but life prediction under these complex situations is still under constant improvement. The present study aims at evaluating residual fatigue life under CAL due to application of the inertial effect coefficient by adopting a dynamical coefficient mechanics (DCM) model. The proposed model was illuminated based on static fracture mechanics and the correlative problems of dynamic fracture mechanics were changed into ones of linear elastic fracture mechanics (LEFM) by d''alembert''s principle. A new expression for the fatigue crack propagation (FCP) rate has thus been derived. The expression was verified by using couple samples from published experimental results and is in good agreement with the test results.

Full Article:

Palavras-chave: Dynamical coefficient mechanics model, Fatigue crack propagation rate, Constant amplitude loading, Inertial effect coefficient.,


DOI: 10.5151/meceng-wccm2012-18220

Referências bibliográficas
  • [1] Moses F., Schilling C.G., Raju K.S., “Fatigue evaluation procedures for steel bridges”. National Cooperative Highway Research Program (NCHRP) Rep. No. 299, Transportation Research Board, Washington, D.C. 1987.
  • [2] Li, W., Cheung, M.M.S., “Probabilistic fatigue and fracture analysis of steel bridges”. J Struct Saf. 23, 245-62, 2003.
  • [3] Kuntz P., Kulak G.L., “Remaining life of existing steel bridges”. In: 3rd international symposium on steel bridges. October 30 to November 1, Rotterdam, Netherland, 1996.
  • [4] Zhou, Y.E., “Assessment of bridge remaining fatigue life through field strain measurement”. ASCE J Bridge Eng. 11(6), 737-44, 2006.
  • [5] Laird C., “The influence of metallurgical structure on the mechanisms of fatigue crack propagation”. ASTM STP. 415,131,1967.
  • [6] Tomkins B., Biggs W.D., J Mater Sci. 4, 532-8, 1969.
  • [7] Krasowsky A.J., Stepanenko V.A., “A quantitative stereoscopic fractographic study of the mechanism of fatigue crack propagation in nickel”. Int J Fract.15, 203-15, 1979.
  • [8] Wanhill R.J.H., “Microstructural Influences on Fatigue and Fracture Resistance in High Strength Structural Materials”. Engineering Fractrue Mechanics. 10, 337-357, 197
  • [9] Neumann P., “ New experiments concerning the slip processes at propagating fatigue cracks”. Acta Metall. 22, 1155-65, 1974.
  • [10] Neumann P., Acta Metall. 22, 1167-78, 1974.
  • [11] Sadananda K, Vasudevan A. K, Holtz R. L, Lee E. U., “Analysis of overload effects and related phenomenon”. Int J Fatigue. 21, S233-46, 1999.
  • [12] Murthy A. R. C., Palani G. S., Iyer N. R., “State-of-the –art review on fatigue crack growth analysis under variable amplitude loading”. IE(1) J-CV. 85, 118-29, 2004.
  • [13] Broek D., “The practical use of fracture mechanics”. 1988.
  • [14] Kanninen, Melvin F., Popelar, C.H., «Advanced fracture mechanics». Oxford Universtity Press, 563pages, 1985.
  • [15] Xu, Z.Y., “The Investigation of Fatigue Crack growth by Mechanics Approcach”. Modern Mathematics and Mechanics-?, 11, 306-310, 2000.
  • [16] Zhang, M., “The test methods analysis of threshold stress intensity factor of fatigue crack growth”. Transaction of Nan Jing Aeronautics college. 10, 301-306, 1992.
Como citar:

Liu, Z. F.; Gu, L. X.; Xu, Z. Y.; "A DYNAMICAL COEFFICIENT MECHANICS MODEL FOR FATIGUE CRACK GROWTH UNDER CONSTANT AMPLITUDE LOADING", p. 961-967 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-18220

últimos 30 dias | último ano | desde a publicação