中文摘要：

为多级式的段形成的一条过程设计途径被联合紧张分发方法和有限元素方法建议(女性) 每个阶段总计决定最小的阶段数字和变丑。紧张分发方法被用来计算每个阶段的变丑数量并且通过一个安全标准评估 formability。FE 模拟作为一个分析工具被拿揭示变丑行为，以预言紧张轮廓并且在每个阶段决定过程参数。评估热处理的效果在以后在随后的变丑期间在变丑缺点的出现上预先拉紧，为 2B06 铝合金表的多级式的单轴的紧张测试被执行。案例研究证明途径有高可靠性和好有实行可能。

英文摘要：

A process design approach for multi-stage stretch forming was proposed by combining the strain distribution method and finite element method（FEM）to determine the minimum stage number and deformation amount of each stage.The strain distribution method was used to calculate the deformation amount of each stage and evaluate the formability through a safety criterion.FE simulation was taken as an analysis tool to reveal the deformation behaviour,to predict the strain contour and to determine the process parameters at each stage.To evaluate the effect of heat treatment after pre-strain on occurrence of deformation defects during the subsequent deformation,a multi-stage uniaxial tension test for 2B06 aluminium alloy sheet was carried out.A case study demonstrates that the approach has high reliability and good practicability.