A COMPARISON OF DIFFERENT METHODS TO DETERMINE THE THRESHOLD OF FATIGUE-CRACK PROPAGATION

被引：20
|
作者：
PIPPAN, R
STUWE, HP
GOLOS, K
机构：
[1] WARSAW UNIV TECHNOL,WARSAW,POLAND
[2] MONTAN UNIV,INST MET PHYS,A-8700 LEOBEN,AUSTRIA
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 1994年 / 16卷 / 08期
关键词：
FATIGUE; THRESHOLD; ALUMINUM ALLOY; POTENTIAL DROP TECHNIQUE; STRESS RATIO; FATIGUE CRACK PROPAGATION;
D O I：
10.1016/0142-1123(94)90484-7
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Three different methods for determining the threshold value for fatigue crack growth - the load-shedding technique, the stepwise increase of load amplitude on specimens precracked in cyclic compression, and decrease of stress intensity range at a constant maximum stress intensity - were applied to a high-strength aluminium alloy. The load-shedding technique tended to lead to higher values of the threshold, especially at low R-ratios. The threshold determined with decreasing stress intensity range at a constant maximum stress intensity was larger than the effective threshold determined with stepwise increasing of load amplitude on specimens precracked in cyclic compression.
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页码：579 / 582
页数：4
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