異材継手の界面接合部の端部に存在するき裂のg値について : 異材継手の強度評価試験片寸法について(第2報)

概要

論文の詳細を見る
The energy release rate, g, used for estimating the joint strength of dissimilar material joints with defect has been investigated by means of a boundary element method (BEM). Size and material parameters of g value in both load and residual stress fields were derived. The main conclusions are as follows : 1) In a thermal stress filed, the relation between g value and material properties is given by the following equation ; For the case of Poisson's ratios of dissimilar materials being equal, [numerical formula] where E is Young's modulus. ν is Poissons' ratio. α is a coefficientof linear expansion. T is temperature difference. α is half length of crack. Suffix A and B mean materials A and B. For the case of ν^A being different from ν^B, [numerical formula] 2) When the height of specimen, h, is greater than the width of specimen, b, h, hardly affects g value in both load and residual stress fields.3) When b is greater than twice of h, g value is almost constant in both fields.
社団法人溶接学会の論文
1991-05-05