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.

引用

页码：1155 / 1170

页数：16

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