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首页> 外文期刊>ONERA Scientific and Technical Activities >Non local modeling of damage in laminate composites
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Non local modeling of damage in laminate composites

机译：层状复合材料损伤的非局部建模

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摘要

The difficulties associated with softening material behaviors - for instance damage models - are well known, notably the loss of ellipticity of the variational problem, which leads to a very strong dependency of the results on the mesh used, rendering these sophisti-cated softening models impossible to use in predicting the behavior of complex structures, especially using the finite elements method.The mesh dependency appears mainly in two guises: (i) pronounced localization of damaged areas in a fine region of the mesh which leads to the structural collapse without consuming energy, (ii) strong influence of the local orientation of elements leading the damaged areas to follow the mesh rather than physics.
机译：与软化材料行为有关的困难（例如损坏模型）是众所周知的，尤其是变分问题的椭圆度损失，这导致结果非常依赖所使用的网格，从而使这些复杂的软化模型无法实现用于预测复杂结构的行为，尤其是使用有限元方法。网格依赖性主要表现为两种形式：（i）网格细区域中受损区域的明显定位，这导致结构塌陷而不消耗能量，（ii）元素局部方向的强烈影响会导致受损区域遵循网格而不是物理。

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