Paper Title:
Numerical Simulation of the Cold Expansion and Residual Stress Relaxation for Aluminum Alloy 7050
  Abstract

Cold expansion is a well-known technique for improving the fatigue life of fastener holes in aeronautical structures by introducing a compressive residual stress field around them. In this paper, a 3-D finite element model is used to analyze the residual stress distribution and relaxation around an expanded hole for aluminum alloy 7050. The results reveal that the cutting process of split sleeve cold expansion and creep are main reason for residual stress relaxation in room temperature, which may limit the beneficial effects of cold expansion.

  Info
Periodical
Chapter
Chapter 8: Material Processing Technology
Edited by
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
Pages
1656-1661
DOI
10.4028/www.scientific.net/AMM.117-119.1656
Citation
D. Guan, Q. Sun, "Numerical Simulation of the Cold Expansion and Residual Stress Relaxation for Aluminum Alloy 7050", Applied Mechanics and Materials, Vols. 117-119, pp. 1656-1661, 2012
Online since
October 2011
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Price
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