An FE analysis for assessing the effect of short-term exposure to elevated temperature on residual stresses around cold expanded fastener holes in aluminum alloy 7075-T6

被引：29
作者：
Aghdam, A. B. [2 ]
Chakherlou, T. N. [1 ]
Saeedi, K. [3 ]
机构：
[1] Univ Tabriz, Fac Mech Engn, Tabriz, Iran
[2] Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA
[3] Concordia Univ, Dept Mech Engn, Montreal, PQ H3G 1M8, Canada
来源：
MATERIALS & DESIGN | 2010年 / 31卷 / 01期
关键词：
FATIGUE LIFE; CLAMPING FORCE; EXPANSION; PERFORMANCE; BEHAVIOR;
D O I：
10.1016/j.matdes.2009.06.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A previous experimental study revealed fatigue life reduction in Al 7075-T6 cold expanded fastener holes exposed to 120 degrees C for 1 h. The obtained experimental evidence indicated a residual stress reduction associated with material softening at elevated temperatures, termed as thermo-mechanical stress relaxation. In order to identify and characterize the potential features of this phenomenon, FE analysis is carried out in this study and a detailed body of evidence is provided for occurrence of a time-independent thermo-mechanical residual stress relaxation around cold expanded fastener holes due to exposure to elevated temperature. The results of FE simulation demonstrate a good agreement with experimental results obtained earlier. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：500 / 507
页数：8
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