EFFECT OF STRESS RATIO AND LOADING CONDITION ON THE FATIGUE THRESHOLD

被引：26

作者：

CHEN, DL

WEISS, B

STICKLER, R

机构：

[1] University of Vienna, A-1090 Vienna

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 1992年 / 14卷 / 05期

基金：

中国国家自然科学基金; 奥地利科学基金会;

关键词：

FATIGUE THRESHOLD; CRACK CLOSURE; CLOSURE EVALUATION PROCEDURE; STRESS RATIO; LOADING CONDITION;

D O I：

10.1016/0142-1123(92)90484-T

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The fatigue threshold behaviour of cold-worked copper tested under different fatigue loading modes (axial, bending) and conditions (various test frequencies and stress ratios) has been investigated. Emphasis was placed on the determination and evaluation of crack-closure effects as well as the computation of the effective fatigue threshold stress intensity. A special strain gauge technique was used to determine the load displacement curves. A newly proposed closure evaluation method was introduced which permits the explanation of the dependence of the fatigue threshold on stress ratio and loading conditions. The effective fatigue threshold of about 3 MPa square-root m was determined for cold-worked copper. Various evaluation procedures are discussed.

引用

页码：325 / 329

页数：5

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