NOTCH FATIGUE BEHAVIOR AS INFLUENCED BY PERIODIC OVERLOADS

被引：21

作者：

DUQUESNAY, DL ^{[1
]}

MACDOUGALL, C ^{[1
]}

DABAYEH, A ^{[1
]}

TOPPER, TH ^{[1
]}

机构：

[1] UNIV WATERLOO,DEPT CIVIL ENGN,WATERLOO,ON N2L 3G1,CANADA

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 1995年 / 17卷 / 02期

关键词：

NOTCHES; OVERLOADS; VARIABLE-AMPLITUDE LOADING; FATIGUE NOTCH FACTOR; CRACK GROWTH; THRESHOLD; CRACK CLOSURE;

D O I：

10.1016/0142-1123(95)95887-M

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The fatigue behaviour of centre-notched specimens of a 2024-T351 aluminium alloy is examined under a variable-amplitude loading sequence consisting of a periodic compression-tension overload of yield magnitude followed by smaller high stress ratio cycles. It is found that the effects of both overloads and notches can act simultaneously to reduce severely the fatigue strength of notched specimens and that the notch-size effect that is typically observed under constant-amplitude loading is reduced by periodic overloading. This is attributed to the absence of crack closure in the loading sequence examined. A crack growth model is developed to predict the fatigue life of notched specimens subjected to periodic overloads.

引用

页码：91 / 99

页数：9

共 26 条

[21]

Neuber H, 1961, J APPLIED MECHANICS, V28, P544, DOI [DOI 10.1115/1.3641780, 10.1115/1.3641780]

[22]

Smith RA, 1977, J MECH ENG SCI, V20, P201

[23] THE CONSEQUENCES OF SHORT CRACK CLOSURE ON FATIGUE CRACK-GROWTH UNDER VARIABLE AMPLITUDE LOADING [J].

VORMWALD, M ;

SEEGER, T .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 1991, 14 (2-3) :205-225

[24]

YAN X, 1992, SAE920665 SOC AUT EN

[25] NOTCH FATIGUE BEHAVIOR OF SAE1045 STEEL [J].

YU, MT ;

DUQUESNAY, DL ;

TOPPER, TH .

INTERNATIONAL JOURNAL OF FATIGUE, 1988, 10 (02) :109-116

[26]

YU MT, 1985, THESIS U WATERLOO WA

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