Based on plastic intensifying theory, dual-linearity material model is used to calculate stress and strain on the cross section of a torsion bar spring by FE method.

在塑性硬化强扭理论的基础上，利用双线性材料模型计算了扭杆弹簧第一次强扭过程横截面的应力和应变。

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The proposed method is used with FE simulations, and the example of spring-back compensation demonstrates that it is efficient, accurate and robust for auto panel forming process optimization.

该方法无须求解函数灵敏度，在保证拟合精度的前提下，能光滑响应并最大程度减少精确分析计算量，分析前翼子板回弹补偿优化设计实例，证明其具有很高的精度和鲁棒性。

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