FATIGUE CRACK-PROPAGATION BEHAVIOR UNDER VARIABLE AMPLITUDE LOADING IN THE NEAR-THRESHOLD REGION OF A HIGH-STRENGTH LOW-ALLOY STEEL

被引：4
|
作者：
HENAFF, G [1 ]
PETIT, J [1 ]
JOURNET, B [1 ]
机构：
[1] AEROSPATIALE,CTR COMMUN RECH LOUIS BLERIOT,DEPT MAT,F-92152 SURESNES,FRANCE
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1992年 / 15卷 / 11期
关键词：
D O I：
10.1111/j.1460-2695.1992.tb00040.x
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The near-threshold behaviour of a high-strength low-alloy steel used in helicopter rotors under variable amplitude loading is investigated in ambient air and in vacuum. Strong sequence effects occur, in particular a high decrease in crack growth rates after overloads of 40% on maximum load while keeping the amplitude constant. A detailed study of the retardation phenomenon due to the overloads provides an explanation for the different behaviour observed in air and in vacuum and has laid the basis for a method of predicting crack propagation under helicopter loading spectra.
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页码：1155 / 1170
页数：16
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