期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 30, 期 10-11, 页码 1691-1698出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2008.03.004
关键词
damage accumulation; damage plasticity theory; low cycle fatigue; extremely low cycle fatigue; ductile fracture
it is well-known that the empirical Manson-Coffin law tends to over-predict the cyclic life under extremely low cycle fatigue condition. In the present paper, a new unified expression is proposed to overcome this shortcoming. By introducing an exponential function, this new expression is capable of capturing the cyclic life over the entire span of extremely low cycle fatigue to low cycle fatigue with an additional material parameter to calibrate. Experimental data from existing literature are used to demonstrate the applicability of the proposed expression for several polycrystalline metals. The implication of the new expression to monotonic plastic fracture is discussed. It is also identified that the exponent in the unified expression is sensitive to temperature. Examples are given for the thermal influence on the material constants. (C) 2008 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据