加工硬化和退火软化效应对316不锈钢厚壁管-管对接接头残余应力计算精度的影响

李索, 陈维奇, 胡龙, 邓德安

Influence of Strain Hardening and Annealing Effect on the Prediction of Welding Residual Stresses in a Thick-Wall 316 Stainless Steel Butt-Welded Pipe Joint

LI Suo, CHEN Weiqi, HU Long, DENG Dean

图6 新开发的动态退火模型的UHARD子程序流程图

Fig.6 Flowchart of the UHARD subroutine of the new time-temperature-dependent annealing model (t—time, ΔH—increment of the von Mises equivalent plastic strain, εˉp—accumulated plastic strain, H'—accumlated hardening term, f—annealing factor, TA—annealing temperature, σs—yield stress, the prefix Δ represents the increment of variables at the current time step, the subscripts t and t + Δt represent variables at the previous and current time steps, respectively)