Experimental and analytical assessment of fatigue and crack propagation in cold worked open hole specimens

被引：11
|
作者：
Boni, L. [1 ]
Fanteria, D. [1 ]
Lanciotti, A. [1 ]
Polese, C. [1 ,2 ]
机构：
[1] Univ Pisa, Dept Aerosp Engn, Pisa, Italy
[2] Univ Witwatersrand, Sch Mech Ind & Aeronaut Engn, Johannesburg, South Africa
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2013年 / 36卷 / 09期
关键词：
cold expansion; fatigue tests; finite element analysis; life prediction; residual stresses; MEASURING RESIDUAL-STRESSES; FINITE-ELEMENT SIMULATION; FASTENER HOLES; ALUMINUM-ALLOY; EXPANSION; LIFE; RELAXATION; COLDWORKING; WORKING;
D O I：
10.1111/ffe.12050
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Fatigue and crack propagation tests are carried out on 7075-T73 open hole aluminium alloy specimens. A remarkable increment of fatigue life due to the Split Sleeve Cold Expansion (TM) process is observed, further improved by applying the process twice on the same hole. Comparable increments are obtained by using the StressWave (TM) method. Specific tests are performed in order to point out a possible relaxation of the residual stresses due to fatigue loading. The results obtained reveal no relaxation phenomena in the tested specimens. The compressive residual stress around cold expanded holes is numerically evaluated. Dedicated experiments based on the Sachs method are conducted to confirm the residual stress prediction.
引用
收藏
页码：930 / 941
页数：12
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