In-situ strain measurement and error analysis of arc welding with 2D digital image correlation  

作　　者：Huang Honghao Hu Minghua Xu Aijie Song Yulin Chen Huabin 黄宏浩;胡明华;徐爱杰;宋育林;陈华斌(School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240,China;Shanghai Space Precision Machinery Research Institute,Shanghai,201600,China)

机构地区：[1]School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240,China [2]Shanghai Space Precision Machinery Research Institute,Shanghai,201600,China

出　　处：《China Welding》2022年第3期17-23,共7页中国焊接（英文版）

摘　　要：The deformation and residual stress generated by the welding process can seriously affect the use of components.As a result,it is very important to understand the evolution of stress and strain during the welding process.The strain measurement method based on digital image correlation(DIC)is an excellent method to detect welding strain and residual stress.The out-of-plane translation and out-of-plane rotation introduce errors to the two-dimensional DIC.In this paper,the causes of errors are analyzed theoretically,and the formulas of errors caused by the out-of-plane displacement and the out-of-plane rotation are derived.The out-of-plane translation experiment and the out-of-plane rotation experiment were carried out to verify the theory,and the experimental results are consistent with the theoretical analysis results.The error caused by the out-of-plane translation can be reduced by increasing the object distance;the error caused by the out-of-plane rotation is greatly affected by the rotation angle.

关 键 词：arc welding digital image correlation strain measurement error analysis 

分 类 号：TG44[金属学及工艺—焊接]