摘要
在焊接加热和冷却过程中,组成焊件的小窄条之间不可能存在完全刚性拘束,端面不可能保持平面,会分别产生凸出和凹进,平截面假设不成立。不用平截面假设也可以得到类似的焊接残余应力分布。焊缝不存在残余压缩塑性应变,只存在拉伸应变,焊缝和近缝区残余压缩塑性应变分布和大小的传统观点不成立。提出新的近似用熔池最宽处温度分布表示的拉伸塑性应变分布原理图及其相应的计算公式。
In the process of heating and cooling during welding,complete rigidity restraint is not in existence between narrow lath of weldment and the face can not keep to be flat which generate convex and concave.While similar welding residual stress distribution can also be obtained without such plain section hypothesis.No residual compressive plastic deformation exists in the weld metal and there is only tension strain.The traditional view that the distribution of residual compressive plastic strain across the wel...
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2008年第6期73-76,116-117,共6页
Transactions of The China Welding Institution
关键词
焊接应力应变
平截面假设
压缩塑性应变
拉伸塑性应变
welding stress and strain
hypothesis of plain section
compressive plastic strain
tensile plastic strain
