摘要
用钻孔法测定焊接残余应力时，孔边塑性变形对测量精度有很大影响，本文对孔边屈服过程进行了研究，克服了以往在误差修正方法中的缺点，确定了塑性释放应变εｐ与主应力σｉ、σ２和主方向角β的函数关系，用以修正孔边塑性变形引起的测量误差，使得在二维应力状态下的测量误差降至２％以下。
Investigates the hole-edge yielding,rectifies the inadeqacies of previotus method in errormodification and formulates functional relation betweene,εp (plastic released strain)and σ1、σ2(principal stresses)and β(principal angle).Revises the measurement-error produced by thehole-edge plastic deformation with the formulation.
出处
《大连铁道学院学报》
1994年第2期87-94,共8页
Journal of Dalian Railway Institute
关键词
焊接
残余应力
测量误差
钻孔法
塑性释放应变
welding
res idual stress
measuring error/ hole-drilling m,ethod
plastic released strain
