Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2009.438.448ShariatiM. MaghrebiM.J. 3200993In this study, the experimental behaviors of the fatigue
crack growth are studied and the fatigue lives of tensile-shear (TS) specimens
are determined. To achieve this, many TS specimens are prepared by the
welding mild steel sheets of 1 and 1.5 mm thickness and then tested under
constant amplitude loading using a servo-hydraulic fatigue testing machine
(INSTRON 8802). The fatigue crack growth and the crack length are measured
simultaneously by an optical microscope with 100X magnification. The experimental
results indicate that the fatigue life of specimens decreases with any
increase in load level. Also the crack initiation and propagation firstly
occurs in plate with less thickness. According to the experimental observations
when a high level loading is applied to the spot weld joints, the nugget
suddenly pull-out and cannot withstand the fatigue loading.]]>Lin, S.H., J. Pan, S.R. Wu, T. Tyan and P. Wung,2002391939Lin, P.C., S.H. Lin and J. Pan,20067322292249Lin, S.H., J. Pan, T. Tyan and P. Prasad,20034055395564Pan, N. and S. Sheri, 200224519528Pan, N. and S.D. Sheri,200370671684Zhang, Y. and D. Taylor,2000675563Deng, X., W. Chen and G. Shi, 2000351739Sevim, I.,2006272130Bouyousfi, B., T. Sahraoui, S. Guessasma and K.T. Chaouch,200728414419Svenssona, T., P. Johannessona and J. de Marea,2005 27954965Lin, P.C. and J. Pan,2008451415Marashi, P., M. Pouranvari, S. Amirabdollahian, A. Abedi and M. Goodarzi2008A480334346Sun, X. and M.A. Khaleel, 20073416681682Kong, X., Q. Yang, B. Li, G. Rothwell, R. English and X.J. Ren,20082915541561Maa, C., D.L. Chen, S.D. Bhole, G. Boudreau, A. Lee and E. Biro,2008A485334346Lotsberg, I., 200821138159Wang, R.J. and S. De-Guang,20082008Long, X. and S.K. Khanna,200729879886Lin, P.C., D.A. Wang and J. Pan, 20074410131037Feulvarch, E. P. Rogeon, P. Carre, V. Robin, G. Sibilia and J.M. Bergheau,200649345367