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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part C. Journal of mechanical engineering science >Characterisation of the impact induced damage in composites by cross-comparison among experimental non-destructive evaluation techniques and numerical simulations
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Characterisation of the impact induced damage in composites by cross-comparison among experimental non-destructive evaluation techniques and numerical simulations

机译：实验性非破坏性评价技术与数值模拟中的交叉比较对复合材料造成损伤的表征及数值模拟

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摘要

Composite fibre-reinforced materials, under low velocity impacts, can experience simultaneous interacting failure phenomena, such as intra-laminar damage, fibre breakage and matrix cracking, and inter-laminar damage such as delaminations. These failure mechanisms are usually the subject of extensive investigations because they can cause a significant reduction in strength of composites structures leading to premature failure. In the present work, composite plates under low velocity impact are investigated. Experimental data, such as experimental curves and images from non-destructive inspections, are used to characterise the low velocity impacts-induced damage in conjunction with a non-linear explicit Finite element numerical model. The adopted numerical model, implemented in the FE code (Abaqus/Explicit) by a user-defined material subroutine (VUMAT), has been demonstrated to be very effective in predicting the damage onset and evolution and, in general, able to correctly integrate the experimental data by providing useful information about the impact damage localisation and evolution.
机译：复合纤维增强材料，在低速冲击下，可以同时进行同时相互作用的失效现象，例如层内损伤，纤维破裂和基质裂缝，以及层间损坏，如分层。这些故障机制通常是广泛研究的主题，因为它们会导致复合材料结构的强度显着降低，导致过早失效。在本作工作中，研究了低速冲击下的复合板。实验数据（例如来自非破坏性检查的实验曲线和图像）用于表征低速撞击引起的损坏与非线性显式有限元数值模型结合。通过用户定义的材料子程序（VUMAT）在FE代码（ABAQUS / Specis）中实施的采用的数值模型已经证明是非常有效的，以预测损坏发作和进化，并且通常能够正确整合通过提供有关影响损害本地化和演化的有用信息的实验数据。

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