Study of the location of testing area in residual stress measurement by Moiré interferometry combined with hole-drilling method  

作　　者：QIN Le XIE HuiMin ZHU RongHua WU Dan CHE ZhiGang ZOU ShiKun 

机构地区：[1]Key Laboratory of Applied Mechanics (AML), Department of Engineering Mechanics, Tsinghua University [2]Beijing Aeronautical Manufacturing Technology Research Institute

出　　处：《Science China(Physics,Mechanics & Astronomy)》2014年第4期708-715,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2010CB631005 and 2011CB606105);the National Natural Science Foundation of China(Grant Nos.11232008,91216301,11227801 and 11172151);Tsinghua University Initiative Scientific Research Program

摘　　要：This paper investigates the effect of the location of testing area in residual stress measurement by Moiréinterferometry combined with hole-drilling method.The selection of the location of the testing area is analyzed from theory and experiment.In the theoretical study,the factors which affect the surface released radial strainεr were analyzed on the basis of the formulae of the hole-drilling method,and the relations between those factors andεr were established.By combining Moiréinterferometry with the hole-drilling method,the residual stress of interference-fit specimen was measured to verify the theoretical analysis.According to the analysis results,the testing area for minimizing the error of strain measurement is determined.Moreover,if the orientation of the maximum principal stress is known,the value of strain will be measured with higher precision by the Moiréinterferometry method.This paper investigates the effect of the location of testing area in residual stress measurement by Moiréinterferometry combined with hole-drilling method.The selection of the location of the testing area is analyzed from theory and experiment.In the theoretical study,the factors which affect the surface released radial strainεr were analyzed on the basis of the formulae of the hole-drilling method,and the relations between those factors andεr were established.By combining Moiréinterferometry with the hole-drilling method,the residual stress of interference-fit specimen was measured to verify the theoretical analysis.According to the analysis results,the testing area for minimizing the error of strain measurement is determined.Moreover,if the orientation of the maximum principal stress is known,the value of strain will be measured with higher precision by the Moiréinterferometry method.

关 键 词：hole-drilling residual stress Moiré interferometry testing area 

分 类 号：TG52[金属学及工艺—金属切削加工及机床]