轮廓法测试残余应力中的数据处理

中国机械工程

轮廓法测试残余应力中的数据处理

谢国贞1,2,3;吴运新1,2,3;龚海1,2,3;李晨4;刘瑶琼1,4;姬浩4;张伟4

1. 中南大学机电工程学院，长沙，410083
2. 高性能复杂制造国家重点实验室，长沙，410083
3．有色金属先进结构材料与制造协同创新中心，长沙，410083
4. 中国航空工业集团公司第一飞机设计研究院，西安，710000

出版日期:2017-08-10 发布日期:2017-08-07
基金资助:
国家重点基础研究发展计划(973计划)资助项目(2012CB619505)；
国家自然科学基金资助项目（51327902，51405520）；
国家国际科技合作专项（2014DFA51250）；
高性能复杂制造国家重点实验室自主研究课题（ZZYJKT2016-02）
National Basic Research Program (973 Program) （No. 2012CB619505）
National Natural Science Foundation of China （No. 51327902，51405520）
International S&T Cooperation Program of China（No. 2014DFA51250）

Data Processing in Residual Stress Measurements Using Contour Method

XIE Guozhen1,2,3;WU Yunxin1,2,3;GONG Hai1, 2,3;LI Chen4;LIU Yaoqiong1,4;JI Hao4;ZHANG Wei4

1.College of Mechanical and Electrical Engineering, Central South University, Changsha,410083
2.State Key Laboratory of High Performance Complex Manufacturing,Changsha, 410083
3.Nonferrous Metal Oriented Advanced Structural Materials and Manufacturing Cooperative Innovation Center, Changsha,410083
4.AVIC the First Aircraft Institute, Xi'an,710000

Online:2017-08-10 Published:2017-08-07
Supported by:
National Basic Research Program (973 Program) （No. 2012CB619505）
National Natural Science Foundation of China （No. 51327902，51405520）
International S&T Cooperation Program of China（No. 2014DFA51250）

摘要/Abstract

摘要： 使用轮廓法测量铝合金T形构件淬火残余应力，重点研究了测量误差的数据处理。采用包络处理、左右轮廓平均、Gauss混合模型拟合以及节点插值处理后，得到最终轮廓值，并将其作为边界条件反向加载到应力重构有限元模型中，得到待测面应力场。使用X射线衍射法对待测面边界处应力进行修正。将测量结果和有限元模拟淬火结果进行对比，利用统计学方法分析对比结果。结果表明：轮廓法和X射线衍射法结合可以很准确地描述T形构件淬火残余应力场。T形构件淬火残余应力最大拉应力出现在筋条和腹板交界处，靠近腹板一侧。

关键词: 轮廓法, 数据处理, 铝合金, T形构件, 残余应力

Abstract: The quenched residual stresses of T-shaped aluminum alloy were tested using the contour method, and the data processing of measurement errors was focused. The final contours were calculated by envelop processing, contour averaging, Gauss mixed model fitting and node interpolation, and then were reversed and loaded to the stress reconstruction FEM model as boundary conditions. Then the mapping of residual stresses along the cross section to be measured were obtained. The stresses at the edge were modified using X-ray diffraction method. The comparisons of measured results with quenching FEM results were analyzed via statistical methods. The results indicate that the quenched residual stress fields may be described accurately by combining contour method and X-ray diffraction method. The maximum tensile residual stress of the T-shaped specimen occurs at the junction of the rib and web, and close to the web.

Key words: contour method, data processing, aluminum alloy, T-shaped specimen, residual stress

中图分类号:

TG166.3

谢国贞1,2,3;吴运新1,2,3;龚海1,2,3;李晨4;刘瑶琼1,4;姬浩4;张伟4. 轮廓法测试残余应力中的数据处理[J]. 中国机械工程.

XIE Guozhen1,2,3;WU Yunxin1,2,3;GONG Hai1, 2,3;LI Chen4;LIU Yaoqiong1,4;JI Hao4;ZHANG Wei4. Data Processing in Residual Stress Measurements Using Contour Method[J]. China Mechanical Engineering.

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https://www.cmemo.org.cn/CN/Y2017/V28/I15/1778

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