采用准静态非耦合模型,对激光束扫描板料表面时形成的三维瞬态温度场进行了有限元模拟,并将温度载荷转化为节点力,进一步完成了三维热弹塑性形变场的模拟.通过对温度、位移、应力分布的动态演示,定量地分析了板料激光弯曲的变形机理.

Based on the quasi static and non coupling models, the FEM simulation on three dimensional transit temperature field of laser heating sheet metal is conducted, the temperature load is then converted to the nodal force, and the 3D thermal elasto plastic stress/strain fields are obtained. The main results show the forming mechanisms clearly.