Prediction model of residual stress field in aluminum alloy plate  

作　　者：龚海 吴运新 廖凯 

机构地区：[1]School of Mechanical and Electrical Engineering,Central South University

出　　处：《Journal of Central South University》2011年第2期285-289,共5页中南大学学报（英文版）

基　　金：Projects(2005CB623708, 2010CB731703) supported by the National Basic Research Program of China

摘　　要：Residual stress distributions in 7075 aluminum alloy thick plates with different thicknesses and different quenching speeds were measured. A shape function of stress distribution was proposed based on the internal stress distribution characteristics of aluminum alloy. Using nonlinear regression technology,the function between stress value of key points on internal stress curve and surface stress of the plate was obtained. Based on the measured surface stress,stress value of key points and stress distribution shape,the internal stress distribution can be reconstructed. The experiments show that the model is of good engineering practicality.Residual stress distributions in 7075 aluminum alloy thick plates with different thicknesses and different quenching speeds were measured. A shape function of stress distribution was proposed based on the internal stress distribution characteristics of aluminum alloy. Using nonlinear regression technology, the function between stress value of key points on internal stress curve and surface stress of the plate was obtained. Based on the measured surface stress, stress value of key points and stress distribution shape, the internal stress distribution can be reconstructed. The experiments show that the model is of good engineering practicality.

关 键 词：aluminum alloy residual stress thick plate surface stress prediction model 

分 类 号：O344.1[理学—固体力学]