arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.13348math.NAcs.NA
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光纤网络的数值多尺度方法

A numerical multiscale method for fiber networks

Morgan Görtz, Gustav Kettil, Axel Målqvist, Andreas Mark, Fredrik Edelvik

摘要:

纤维网络模型可用于研究纸张的力学性能。单个纤维和之间的结合构成了材料的详细表现。然而,详细的微尺度纤维网络模型必须解决有效的数值方法。在这项工作中,提出了一种基于局部正交分解方法的离散网络模型的数值多尺度方法[arXiv:1810.05059]。该方法对于这些网络问题是理想的,因为它减少了问题的最大规模,它适合于并行化,并且它可以有效地解决裂缝扩展。本文所分析的问题是在给定载荷作用下纤维网的节点位移。这个问题被公式化为一个线性系,通过使用上述多尺度方法来解决。为了求解线性系,多尺度方法构造了一个具有良好逼近性质的低维解空间。该方法被观察到工作良好的非结构化的纤维网络,可获得高度本地化的配置的方法的最佳收敛速度。

英文摘要:

Fiber network modeling can be used for studying mechanical properties of paper. The individual fibers and the bonds in-between constitute a detailed representation of the material. However, detailed microscale fiber network models must be resolved with efficient numerical methods. In this work, a numerical multiscale method for discrete network models is proposed that is based on the localized orthogonal decomposition method [arXiv:1810.05059]. The method is ideal for these network problems, because it reduces the maximum size of the problem, it is suitable for parallelization, and it can effectively solve fracture propagation. The problem analyzed in this work is the nodal displacement of a fiber network given an applied load. This problem is formulated as a linear system that is solved by using the aforementioned multiscale method. To solve the linear system, the multiscale method constructs a low-dimensional solution space with good approximation properties. The method is observed to work well for unstructured fiber networks, with optimal rates of convergence obtainable for highly localized configurations of the method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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