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首页> 外文期刊>International Journal for Numerical Methods in Engineering >Remeshing for metal forming simulations-Part II: Three-dimensional hexahedral mesh generation
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Remeshing for metal forming simulations-Part II: Three-dimensional hexahedral mesh generation

机译：用于金属成形模拟的重新网格划分-第二部分：三维六面体网格生成

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摘要

In the present study, a hexahedral mesh generator was developed for remeshing in three-dimensional metal forming simulations. It is based on the master grid approach and octree-based refinement scheme to generate uniformly sized or locally refined hexahedral mesh system. In particular, for refined hexahedral mesh generation, the modified Laplacian mesh smoothing scheme mentioned in the two-dimensional study (Part I) was used to improve the mesh quality while also minimizing the loss of element size conditions. In order to investigate the applicability and effectiveness of the developed hexahedral mesh generator, several three-dimensional metal forming simulations were carried out using uniformly sized hexahedral mesh systems. Also, a comparative study of indentation analyses was conducted to check the computational efficiency of locally refined hexahedral mesh systems. In particular, for specification of refinement conditions, distributions of effective strain-rate gradient and posteriori error values based on a Z~2 error estimator were used. From this study, it is construed that the developed hexahedral mesh generator can be effectively used for three-dimensional metal forming simulations.
机译：在本研究中，开发了六面体网格生成器，用于在三维金属成形模拟中重新网格化。它基于主网格方法和基于八叉树的细化方案来生成大小统一或局部细化的六面体网格系统。尤其是，对于生成精细的六面体网格，使用了二维研究（第I部分）中提到的改进的Laplacian网格平滑方案，以改善网格质量，同时也将元素尺寸条件的损失降至最低。为了研究开发的六面体网格生成器的适用性和有效性，使用均匀大小的六面体网格系统进行了一些三维金属成形仿真。此外，进行了压痕分析的比较研究，以检查局部精加工的六面体网格系统的计算效率。特别地，为了指定细化条件，使用了基于Z〜2误差估计量的有效应变率梯度和后验误差值的分布。根据这项研究，可以认为开发的六面体网格生成器可以有效地用于三维金属成形仿真。

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