材料期刊网

本文根据几种倾斜焊接接头单轴拉伸试验结果,提出了在复杂应力状态下焊接接头承载能力的新计算法,并推导出计算焊接接头强度的经验公式: σ_(eq)=((σ_w~2)+(ewτ_w~2)~(1/2)· 经验公式是根据塑性失稳和现代断裂力学为理论基础提出的。同时指出,倾斜焊接接头总是比垂直焊接接头有较高承载能力的传统概念及计算方法是不完整的。

On the basis of the uniaxis tensile tests of several mitre welding joints, a mathematical treatment for calculating loading capacity of the butt welding joints under complex stress condition was worked out and an empirical formula is given as:σ_(eq)=(σ_w~2+σ_wτ_w~2)~(1/2) The theoretical consideration of this formula is easily approached by the plasticity collapse and the fracture mechanics. It is also clarified that the conventional understanding about the loading capacity in mitre welding joint being always senior to that in perpendicular one, and its related calculation, as well, seem to be not entirely correct.