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首页> 外文期刊>Transactions of Nonferrous Metals Society of China >Three-dimensional combined finite-discrete element approach for simulation of single layer powder compaction process
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Three-dimensional combined finite-discrete element approach for simulation of single layer powder compaction process

机译：三维组合有限元法模拟单层粉末压实过程

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摘要

The application of a combined finite-discrete element modeling approach to simulate the three-dimensional microscopic compaction behavior of single-layer metal powder system was described. The process was treated as a static problem, with kinematical component being neglected. Due to ill condition, Cholesky's method failed to solve the system equations, while conjugate gradient method was tried and yielded good results. Deformation of the particles was examined and compared with the results of physical modeling experiments. In both cases, the inner particles were deformed from sphere to polygonal column, with the edges turning from arc to straight line. The edge number of a particle was equal to the number of particles surrounding it. And the experiments show that the ductile metal particles can be densified only by their plastic deformation without the occurrence of rearrangement phenomenon.
机译：描述了组合有限元建模方法在模拟单层金属粉末系统三维微观压缩行为中的应用。该过程被视为静态问题，运动成分被忽略。由于病态，Cholesky方法无法求解系统方程，而尝试了共轭梯度法并取得了良好的效果。检查了颗粒的变形并将其与物理建模实验的结果进行了比较。在这两种情况下，内部粒子都从球体变形为多边形圆柱，其边缘从圆弧变为直线。粒子的边缘数等于其周围的粒子数。实验表明，韧性金属颗粒仅能通过塑性变形而致密化，而不会发生重排现象。

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