复合材料结构局部-全局建模的有限元网格转换

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES
Xinrun Liu, Xing-Yuan Miao, Seyed Sina Samareh-Mousavi, Xiao Chen
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引用次数: 0

摘要

本研究提出了一种自动网格生成算法,旨在解决模拟大型复合材料结构中小规模缺陷的计算难题。该算法可从与整体结构相对应的粗网格无缝过渡到目标局部区域的高精细网格。过渡元素的数量和形状可通过指定参数进行调整。非均质复合材料模型包括多种材料,如代表层间属性的内聚层,为补充这种方法,专门集成了体积分数计算器,以自动分配每个过渡元素中的混合材料属性。整个过程使用 MATLAB 脚本全自动完成,无需打开有限元分析软件界面。重建的二维模型与皱褶缺陷模型组装在一起,其验证研究证明了模型的可行性。从连接边界的应变和位移、载荷-位移曲线和层间破坏预测等方面考察了模型的性能。与完全精细网格模型相比,网格过渡模型取得了令人满意的结果,并在应力分析中减少了 92% 的计算时间,显示了网格过渡模型在复合材料结构局部-全局建模中的效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Finite element mesh transition for local–global modeling of composite structures

This study presents an automatic mesh generation algorithm designed to address computational challenges in simulating small-scale defects within large composite structures. The algorithm seamlessly transitions from a coarse mesh, corresponding to the global structure, to a highly refined mesh in targeted local regions of interest. The transition element number and shape can be adjusted by the specified parameters. Tailored to complement this method for non-homogeneous composite models, which include multiple materials such as cohesive layers representing interlayer properties, a volume fraction calculator is integrated to automatically assign the mixture material property in each transition element. Entire processes are fully automated using a MATLAB script, eliminating the need to open the FEA software interface. The validation studies of the reconstructed two-dimensional models, assembled with the wrinkle-defect model, demonstrate their feasibility. The performance of the model is examined in terms of strain and displacement at the connecting boundaries, load–displacement curve, and interlayer failure prediction. The mesh transition model achieves agreeable results compared to a fully fine mesh model, and a 92% reduction in computational time in stress analysis, showing the efficiency of the mesh transition for local–global modeling of composite structures.

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来源期刊
Composites Part C Open Access
Composites Part C Open Access Engineering-Mechanical Engineering
CiteScore
8.60
自引率
2.40%
发文量
96
审稿时长
55 days
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