Monel-400合金环焊温度场和残余应力场的数值模拟

摘要

The article analyses Monel-400 alloy cylinder circle weld temperature field and residual stress field by finite element,using ANSYS finite element analyse of large-scale general-purpse software, and draw the thermal cycling curves of the weld fusion line and near location.Then the temperature of node in thermal analysis as the result load on the body of the numerical simulation calculation of stress results show that:The stress of the surfae direction node of x beginning to tensile stress,then transform for the compressive stress, but the nodes of the internediate and the inside surface in x direction is always compressive stress,And the stress value more than appearance;The stress in the node of the surface is the largest in the y direction is 175 MPa,it is 76％ on the yield strength,the highest tensile stress of intermediate nodes and the inside surface nodes .The distribution of the stress in z direction and x direction are the same.%采用ANSYS大型通用有限元分析软件,利用APDL语言模拟计算了Monel-400合金环焊温度场.绘制出焊缝熔合线及其附近的热循环曲线,将热分析得到的节点温度作为体载荷进行应力场的数值模拟计算.结果表明:外表面节点x方向的应力刚开始时为拉应力,12s后转变为压应力,而中间节点和内表面节点x方向的应力始终为压应力,并大于外表面的应力值;外表面节点在Y方向的应力为175 MPa,该应力值是屈服强度的76%,中间节点和内表面节点的最高应力为拉应力,z方向的应力分布规律与x方向的应力分布基本相同.