铝合金厚板残余应力测试方法有效性分析  

Analysis on Validity of Residual Stress Measurement Methods for Aluminum Alloy Thick-plate

作　　者：龚海[1] 吴运新[1] 廖凯[1] 

机构地区：[1]中南大学机电工程学院,长沙410083

出　　处：《材料工程》2010年第1期42-46,共5页Journal of Materials Engineering

基　　金：国家重点基础研究发展计划资助项目(2005CB623708)

摘　　要：通过分析试件应力分布的均匀性,对裂纹柔度法和层削法测试结果的有效性进行了评价。结果表明:深层应力测试方法能有效描述应力分布均匀的试件内应力的真实分布;对于应力分布均匀性差的试件,测试结果反映的是综合应力,不能有效描述内应力的真实分布,内应力分布的准确描述需要结合有限元仿真、表面测试和深层应力测试进行综合评价。The validity of both crack compliance method and layer removal method measurement results was evaluated by analyzing the stress distribution uniformity of the test coupons.The results show that the two methods can describe the real stress distribution effectively for test coupon with mean stress distribution;while for test coupon with unmean stress distribution,the measurement results are synthetic stresses,and can not describe a real stress distribution.In order to describe the real residual stress distribution of test coupon accurately,it is necessary to combine the use of FEM,surface stress measurement and deep floor stress measurement,and to give an integrate evaluation.

关 键 词：残余应力 铝合金 裂纹柔度法 层削法 X射线衍射 有限元法 

分 类 号：TG146.2[一般工业技术—材料科学与工程]