Numerical Simulation Method of Sheet Metal Stamping Process
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摘要: 在板料冲压成形过程中存在着大变形、大应变,且几何、物理及边界条件三重非线性相互耦合使得计算过程较为复杂.在虚功原理的基础上对板料冲压成形过程的弹塑性有限元分析方法进行了研究,并将有限变形弹塑性有限元法引入板料冲压成形过程,采用更新拉格朗日(ULM, Updated Lagrange Method) 方法描述,推导了有限元列式,建立了板料成形过程的有限元分析模型,开发了分析程序.通过对汽车油底壳的成形模拟说明了模型的正确性.Abstract: Due to the large-deformation and large-strain, in addition to the three non-linearity (geometry, physics and contact) coupling with one another during the stamping process, the computational process is extraordinarily complicated. Based on the principle of virtual work, this paper deals with elastic-plastic FEM(Finite Element Methods) of sheet metal stamping process, and then this method is introduced into related analysis processes. At the same time, by using Updated Lagrange Method, a formulation of FEM is deduced, a FEM model of sheet metal stamping process is proposed, and a corresponding analysis program is developed. Numeric results obtained from an automotive oil pan are illustrated to show the model-s validity.
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Key words:
- stamping /
- finite element methods /
- principle of virtual work
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