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金屬成型特殊非協調大變形有限元數值模擬

Numerical Simulation of Metal Forming Using Special Non-ConfirmingLarge Deformation FEM

  • 摘要: 在金屬成型領域,一種較新的特殊非協調大變形有限元法,即增強假設應變有限元法(簡稱EASM)已被研究用于進行數值模擬.為使該方法可適用于分析壓縮大變形問題,對原由Simo提出的EASM列式進行了修正并編制了用于數值模擬變形過程的增強假設應變有限元程序EAS.FOR,通過2個標準算例來驗證該方法的可行性和有效性.

     

    Abstract: In the field of metal forming, a newly special non-confirming large deformation FEM referred to as the Enhanced Assumed Strain Mode (EASM), has been developed to carry out numerical simulation. To make the EASM applicable to analyze the compress deformation problem, the EASM formulation founded by Simo has been modified in terms of reduced factor. Furthermore, this special element has been implemented into a large deformation program EAS.FOR and used to simulate the metal forming process. Two standard illustrations are given to verify the feasibility and validity of the mode.

     

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