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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Multiple scale computational model for damage in composite materials
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Multiple scale computational model for damage in composite materials

机译：复合材料损伤的多尺度计算模型

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摘要

In this paper, a hierarchical multiple scale computational model is proposed to concurrently predict evolution of variables at the structural and microstructural scales, as well as to track the incidence and propagation of microstructural damage. The microscopic analysis is conducted with the Voronoi cell finite element model (VCFEM) while a conventional displacement based FEM code executes the macroscopic analysis. Adaptive schemes and mesh refinement strategies are developed to create a hierarchy of computational sub-domains with varying resolution. Such hierarchy allow for differentiation between non-critical and critical regions, and help in increasing the efficiency of computations through preferential 'zoom in' regions. Coupling between the scales for regions with periodic microstructure is accomplished through asymptotic homogenization, whereas regions of nonuniformity and non--periodicity are modeled by true micro- structural analysis with VCFEM. Various numerical examples are executed for validating the effectiveness of the model for different microstructural configurations.
机译：本文提出了一种分层的多尺度计算模型，以同时预测结构和微观结构尺度的变量演化，并跟踪微观结构损伤的发生和传播。用Voronoi单元有限元模型（VCFEM）进行微观分析，而传统的基于位移的FEM代码则执行宏观分析。开发了自适应方案和网格细化策略以创建具有变化分辨率的计算子域的层次结构。这种层次结构允许在非关键区域和关键区域之间进行区分，并通过优先的“放大”区域帮助提高计算效率。具有周期性微结构的区域的尺度之间的耦合是通过渐近均匀化来完成的，而非均匀性和非周期性的区域则是通过使用VCFEM进行真正的微结构分析来建模的。执行各种数值示例以验证模型对于不同微结构配置的有效性。

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