Plastic strain-controlled short crack growth and fatigue life

被引：43
|
作者：
Polák, J [1 ]
机构：
[1] Acad Sci Czech Republ, Inst Phys Mat, Brno 61662, Czech Republic
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2005年 / 27卷 / 10-12期
关键词：
short crack; plastic strain amplitude; fatigue life; cyclic stress; crack growth;
D O I：
10.1016/j.ijfatigue.2005.06.028
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Constant plastic strain-controlled and constant stress-controlled tests were performed on smooth and lightly notched specimens machined from a massive forging of 42CrMo4 steel. Comparison of the fatigue life curves plotted as function of the plastic strain amplitude and stress amplitude shows a decisive role of plastic strain amplitude. Crack initiation and the kinetics of short crack growth were studied in constant plastic strain amplitude loading and the relation between the crack growth coefficient and plastic strain amplitude was established. This is equivalent to the Coffin-Manson law and shows that the Coffin-Manson law can be interpreted in terms of short crack growth. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1192 / 1201
页数：10
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