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中文核心期刊

板材三维曲面翻边的逆成形预示与修边线确定

3D flanging and blank shape prediction for sheet metal based on one-step inverse FEM

  • 摘要: 基于全量塑性理论和考虑任意形状压料面影响的一步成形有限元逆算法,提出一种板材三维曲面翻边成形和三维修边线的快速模拟方法,能够真实模拟三维翻边过程,进而高精度地确定翻边高度和修边线轮廓形状. 收缩和伸长两种典型的翻边成形模拟结果与基于增量塑性理论的有限元正算法比较,表明了该方法的有效性和高效率.

     

    Abstract: In this paper, a fast simulation scheme for 3D curve binderflanging and blank shape prediction for sheet metal based on one-step inversefinite element method is proposed, in which the total deformation plasticity theory andproportional loading assumption are used. The scheme can be actually used tosimulate 3D flanging with complex curve binder shape, and suitable forsimulating any type of flanging model by numerically determining the flangingheight and flanging lines. Two typical 3D curve binder flangingprocesses includingstretch and shrink characters are simulated at the same time by using thepresent scheme and incremental FE non-inverse algorithm based on incrementalplasticity theory, which show the validity and high efficiency of thepresent scheme.

     

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