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A non-local anisotropic damage model for brittle materials

机译：脆性材料的非局部各向异性损伤模型

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摘要

A non-local damage model is proposed for brittle materials, such as masonry and concrete, starting from a previous proposal of the authors. The model is characterized by symmetric, second order damage tensors, which account for strain-induced anisotropy. Different laws are employed to describe the evolution of damage induced by tensile or compressive strains. The principal directions of damage remain fixed throughout any load history, and a non-rotating smeared crack model is obtained. The model overcomes some deficiencies of the previous local version, as damage at any point is computed according to the strain averaged over a suitable neighbourhood of that point, thus alleviating mesh-dependency effects. The model is successfully applied to the analysis of three-leaf walls tested to failure under different load conditions.
机译：从作者先前的建议开始，提出了一种对脆性材料（如砖石和混凝土）的非局部损伤模型。该模型的特征是对称的二阶损伤张量，其解释了应变引起的各向异性。采用不同的定律来描述拉伸或压缩应变引起的损伤的演变。在所有载荷历史中，损坏的主要方向均保持不变，并获得了非旋转涂污裂纹模型。该模型克服了先前本地版本的一些缺陷，因为根据在该点的适当邻域上平均的应变来计算任意点的损伤，从而减轻了网格相关性的影响。该模型成功地应用于三叶墙的分析，以测试在不同载荷条件下的破坏。

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