Numerical Simulation of the Cold Expansion and Residual Stress Relaxation for Aluminum Alloy 7050

Abstract:

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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.

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Periodical:

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 and 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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$35.00

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