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《Modular Machine Tool & Automatic Manufacturing Technique》 2007-04
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A Study on the Residual Stresses Distribution in Thick Pre-stretched Aluminum Plate

ZHANG Yan-cheng,GONG Ya-dong,SUN Wei-tang(School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110004,China)  
Thick pre-stretched aluminum alloy plates are widely used in aircraft. The distortion caused by residual stresses in thick plates during machining is a common and serious problem.To reduce the machining distortion caused by residual stress,the residual stress distribution in thick plates must be measured.According to the characteristics of the thick pre-stretched aluminum alloy plate,the writer has deduced the modified layer-removal strain method by the elastic mechanical theory to measure the residual stresses in thick plates.The residual stresses distribution along the thick direction of plate 2D70T351 is measured by the new method,and the results of measurement are analyzed.It is shown that the new method deduced in this paper is simple and accurate,and is very useful in engineering.
【Fund】: 教育部重点项目(105057)
【CateGory Index】: V262
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