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Multiscale crack band model for eigenstrain based reduced order homogenization
Computational Mechanics ( IF 4.1 ) Pub Date : 2020-08-11 , DOI: 10.1007/s00466-020-01896-0
Rudraprasad Bhattacharyya , Prodyot K. Basu

A multiscale crack band model is proposed to alleviate spurious mesh size dependence in the solution for a strain softening constitutive model. A continuum damage mechanics-based material model for the constituent phases of a carbon fiber reinforced polymer (CFRP) based composite material is applied to the Eigenstrain based Reduced-order Homogenization framework for multiscale modeling. This paper presents the formulation and demonstrates dissipated energy regularization within the multiscale modeling framework. A key contribution is computationally efficient implementation of multiscale crack band model as user defined subroutine for the commercial software Abaqus. The accuracy of the multiscale crack band model is demonstrated by critical evaluation of the numerical results for CFRP laminates.

中文翻译:

基于特征应变的降阶均质化的多尺度裂纹带模型

提出了一种多尺度裂纹带模型,以减轻应变软化本构模型解中的虚假网格尺寸依赖性。将基于碳纤维增强聚合物 (CFRP) 复合材料的组成相的基于连续损伤力学的材料模型应用于基于特征应变的降阶均质化框架以进行多尺度建模。本文介绍了该公式并演示了多尺度建模框架内的耗散能量正则化。一个关键的贡献是多尺度裂纹带模型作为商业软件 Abaqus 的用户定义子程序的计算高效实现。通过对 CFRP 层压板的数值结果进行严格评估,证明了多尺度裂纹带模型的准确性。
更新日期:2020-08-11
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