使用基于物理的有限变形模型模拟损伤增长

VIII Conference on Mechanical Response of Composites Pub Date : 2021-09-01 DOI:10.23967/composites.2021.073

S´ergio Costa, Hana Zrida, Miguel Herraez, Robin Olsson, Rickard ¨Ostlund

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引用次数: 0

摘要

将纤维扭结的中尺度模型[2]与基体断裂的中尺度模型[1]合并。纤维扭结行为基于纤维扭结理论和有限变形理论。非线性力学行为依赖于压力，并通过结合损伤和破裂面上的摩擦来建模。扭结生长引起的损伤和纤维旋转影响横向性能，反之亦然。考虑到所涉及的高复杂性机制，该模型显示了效率。为了验证该模型，对多轴应力状态(σ 22 ~ σ 11和τ 12 ~ σ 11)的微观力学有限元模拟以及选定的部件试验进行了测试。两种模型的结合得到了基于物理的复合材料损伤增长和碰撞的高清晰度三维本构模型。

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Modelling Damage Growth Using a Physically-Based and Finite Deformation Model

A mesoscale model for ﬁbre kinking [2] is merged with a model for matrix fracture [1]. The ﬁbre kinking behaviour is based on ﬁbre kinking theory and ﬁnite deformation. The nonlin-ear behaviour is pressure dependent and is modelled by combining damage and friction on the fracture plane. The damage and ﬁbre rotation due to kinking growth affects the transverse behaviour and vice-versa. The model shows efﬁciency considering the high complexity mech-anisms involved. For veriﬁcation the model is tested against micro-mechanical FE simulations with multi-axial stress states such as σ 22 − σ 11 and τ 12 − σ 11 and against selected component tests. The combination of both models results in a high deﬁnition and physically-based 3D constitutive model for damage growth and crash of composite materials.

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VIII Conference on Mechanical Response of Composites

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