On the Study of Fatigue Crack Propagation in the Time Domain

摘要:

文章预览

In-situ SEM observations have revealed that fatigue crack propagation in aluminium alloys is caused by the shear band decohesion around the crack tip and the formation and cracking of the shear band is mainly caused by the plasticity generated in the loading part of the load cycle. This shear band decohesion process has been observed to occur in a continuous way over the time period during the load cycle. Based on this observation, in this study, the transient fatigue crack growth rate, da/dt, has been used to obtain the relationship between the conventional used parameter da/dN and the applied driving force. It is proven that two parameters are necessary in order to accurately describe fatigue crack propagation rate per stress cycle, da/dN. The well known stress ratio effects on fatigue crack propagation rate can be correlated by this model.

信息:

期刊:

编辑:

J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel

页数:

293-296

引用:

J. Z. Zhang et al., "On the Study of Fatigue Crack Propagation in the Time Domain", Key Engineering Materials, Vols. 348-349, pp. 293-296, 2007

上线时间:

September 2007

输出:

价格:

$38.00

[1] W. Elber: Engineering Fracture Mechanics, Vol. 2 (1970), p.37.

[2] M. Klesnil, P. Lukas: Material Science and Engineering, Vol. 9 (1972), p.231.

[3] A.K. Vasudevan, K. Sadananda, and N. Louat: Mater Sci Eng A., Vol. 188 (1994), p.1.

[4] K. Donald, P.C. Paris: International Journal of fatigue, Vol. 21 (1999), S47.

[5] J.Z. Zhang: Engineering Fracture Mechanics, Vol. 65 (2000), p.665.

[6] J.Z. Zhang, and Z.X. Meng: Script Materialia, Vol. 50 (2004), p.825.

[7] P.C. Paris PC, H. Tada, and J.K. Donald: International Journal of Fatigue Vol. 21(1999), S35.