Virtual modelling of microscopic damage in polymer composite materials at high rates of strain
Virtual modelling of microscopic damage in polymer composite materials at high rates of strain
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DOI：
10.1179/1743289810y.0000000007
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发表时间：
2011-09-01
影响因子：
2
通讯作者：
Brown, K. A.
中科院分区：
文献类型：
--
作者：
Lidgett, M.;Brooks, R.;Brown, K. A.
本文报告了多尺度建模方法的开发，旨在生成虚拟材料数据，用于对高应变率（例如，应变）下的复合材料和结构进行宏观有限元分析。 g。在爆炸或弹道载荷下。在由 S2/8552 玻璃/环氧树脂纤维和基体组成的微型晶胞上进行了有限元模拟。在拉伸、压缩和剪切下从极低 (1 s(-1)) 到极高 (10 000 s(-1)) 应变率下运行模拟，以预测中尺度单向复合纱线的有效机械性能。微尺度模型可预测可获得验证数据的负载情况下的刚度和强度值。模型中不仅可以观察到应变率依赖性，还可以识别关键损伤模式，例如纤维失效、界面失效和基体开裂。
This paper reports on the development of a multiscale modelling approach aimed at producing virtual material data for the macroscopic finite element analysis of composite materials and structures subject to high rates of strain, e. g. under blast or ballistic loading. Finite element simulations were undertaken on a microscale unit cell consisting of S2/8552 glass/epoxy fibres and matrix. Simulations were run in tension, compression and shear from very low (1 s(-1)) to very high (10 000 s(-1)) strain rates to predict the effective mechanical properties of a mesoscale unidirectional composite yarn. The microscale model predicts the stiffness and strength values for the loading situations in which validation data are available. Not only is strain rate dependence observed in the model, but also key damage modes can be identified, such as fibre failure, interface failure and matrix cracking.