宽板拉弯的数值分析与回弹计算

Numerical calculation and analysis on spring back of sheet metal stretch bending

将宽板拉弯的变形区划分成若干个单元 ,按单元的塑性变形体积不变条件确定应变 ,利用增量理论 ,求算宽板拉弯的应力分布 ,并依据应力分布曲线 。

Increment strain theory is applied to calculating the distribution of the stress in stretch bending of sheet metal. The formed zone is divided into many elements to determine the strain by the condition that metal remains constant volume in deformation. Then according to the distribution of the stress, spring back and residual stress have been computed.