Multi-physics finite element-material point method for metal additive manufacturing
The intricacies of thermo-fluid-solid interactions greatly challenge the numerical methods for metal additive manufacturing processes.We propose a multi-physics finite element-material point method to address this problem.The method employs a structured background grid,finite elements,and material points to discretised material domains and subsequently integrates them through a partitioned approach and interface coupling method.The material points and the finite elements are utilized for the potential melting region and the non-melting region,respectively,such that their respective advantages in solving extreme deformation and small deformation problems are incorporated into the method for enhancing efficiency without compromising accuracy.Numerical cases demonstrate the accuracy of the proposed method for the thermo-fluid-solid coupling problems,its superior efficiency compared with existing algorithms,and the continuity of temperature and stress at the finite element-material point interface.This study presents an efficient method for the multi-physics coupling problems in metal additive manu-facturing.
multi-physicsfluid-structure interactionmaterial point methodfinite element methodadditive manufacture
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