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A MODIFIED FRACTURE-MECHANICS APPROACH TO METAL FATIGUE

被引：11
作者：
DUQUESNAY, DL
ABDELRAOUF, H
TOPPER, TH
PLUMTREE, A
机构：
[1] UNIV WATERLOO,DEPT MECH ENGN,WATERLOO N2L 3G1,ONTARIO,CANADA
[2] ZAGAZIG UNIV,DEPT MAT ENGN,ZAGAZIG,EGYPT
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1992年 / 15卷 / 10期
关键词：
D O I：
10.1111/j.1460-2695.1992.tb00026.x
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The fatigue lives, the fatigue limit stress ranges and fatigue notch factors for metallic specimens can be predicted using a modified fracture mechanics model for short cracks based on the combination of solutions for the non-uniform strains at the surface,of a metal and the development of crack closure. The resulting local stress intensity factor exceeds that indicated by linear elastic fracture mechanics at short crack lengths. The model predicts a smooth and continuous variation of the fatigue notch factor with notch size between a lower bound of unity and an upper bound equal to the theoretical notch stress concentration factor. The model is verified using experimental data for a 2024-T351 aluminium alloy for smooth and notched specimens tested at various stress ratios.
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收藏
页码：979 / 993
页数：15
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