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Predicting the crushing behaviour of composite material using high-fidelity finite element modelling

机译:使用高保真有限元建模预测复合材料的破碎行为

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摘要

The capability to numerically model the crushing behaviour of composite structures will enable the efficient design of structures with high specific energy absorption capacity. This is particularly relevant to the aerospace and automotive industries where cabin structures need to be shown to be crashworthy. In this paper, a three-dimensional damage model is presented, which accurately represents the behaviour of composite laminates under crush loading. Both intralaminar and interlaminar failure mechanisms are taken into account. The crush damage model was implemented in ABAQUS/Explicit as a VUMAT subroutine. Numerical predictions are shown to agree well with experimental results, accurately capturing the intralaminar and interlaminar damage for a range of stacking sequences, triggers and composite materials. The use of measured material parameters required by the numerical models, without the need to ‘calibrate’ this input data, demonstrates this computational tool's predictive capabilities
机译:对复合结构的破碎行为进行数值建模的能力将使高效设计具有高比能量吸收能力的结构成为可能。这与需要证明机舱结构具有防撞性的航空航天和汽车行业特别相关。本文提出了三维损伤模型,该模型可以准确地表示复合材料层压板在挤压载荷下的行为。层内和层间失效机制都被考虑在内。压扁破坏模型在ABAQUS / Explicit中作为VUMAT子例程实现。结果表明,数值预测与实验结果吻合良好,可以准确地捕获一系列堆叠顺序,触发器和复合材料的层内和层间损伤。使用数值模型所需的测量材料参数,而无需“校准”此输入数据,证明了此计算工具的预测能力

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