Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (1): 90-94.doi: 10.3969/j.issn.1000-565X.2011.01.017

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Evaluation Model of Residual Stress Field of Pre-Stretched Aluminum Alloy Plate

Wu Yun-xin Gong Hai Liao Kai   

  1. Central south university institute of electrical and mechanical engineering, hunan changsha 41008
  • Received:2010-06-07 Revised:2010-08-07 Online:2011-01-25 Published:2010-12-01
  • Contact: 吴运新(1963一)，男，博士，教授，主要从事高性能铝材、机械振动与故障诊断研究 E-mail:wuyunxin@mail.csu.edu.cn
  • About author:吴运新(1963一)，男，博士，教授，主要从事高性能铝材、机械振动与故障诊断研究
  • Supported by:

    国家“973”计划项目(2010CB731703，2005CB623708)

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Abstract:

In order to easily measure,predict and further control the internal residual stress of thick aluminum alloy plates,first,the internal residual stress of thick 7075 aluminum alloy plate was measured by crack compliance method based on 3-factor 3-level orthogonal experiments.Next,the distribution law of the residual stress was summarized,and a shape function describing the stress distribution was established according to the distribution characteristics of the stress.Then,the relationship between the stress at key points and the residual stress of the plate surface was revealed via the nonlinear regression,and a model to evaluate the residual stress field of the pre-stretched plate was put forward.The model was applied to the evaluation of residual stress of a certain Al alloy plate,with its feasibility being verified at last.

Key words: aluminum alloy, pre-stretch, residual stress, crack compliance method, evaluation model