Material modeling for the simulation of quasi-continuous mode conversion during Lamb wave propagation in CFRP-layers
Material modeling for the simulation of quasi-continuous mode conversion during Lamb wave propagation in CFRP-layers
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DOI：
10.1016/j.compstruct.2016.02.051
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发表时间：
2016-09-01
影响因子：
6.3
通讯作者：
Lammering, R.
中科院分区：
文献类型：
--
作者：
Hennings, B.;Lammering, R.
对于模拟碳纤维增强塑料中兰姆波的传播，材料参数的逐层均匀化是一种非常有效的方法。但是，由于目前对未损伤CFRP结构中波动行为的实验研究揭示了一种称为“准连续模式转换”的效应，而这种层状均匀化方法不能再现这种效应，因此本文提出了一种改进的材料模型，用于兰姆波传播的有限元分析。所采用的二维平面应变态模型考虑了纤维在微尺度上通过均匀的子域在基质材料中的随机分布，从而很好地捕捉到了“准连续模转换”效应。数值研究材料模型对单向层中发展的波模的影响将完成这项工作。(C)2016爱思唯尔有限公司。保留所有权利。
The homogenization of material parameters layer by layer is a mostly sufficient method for the simulation of Lamb wave propagation in carbon fiber reinforced plastics. But since current experimental investigations of the wave behavior in undamaged CFRP structures reveal an effect called "quasi-continuous mode conversion", which can not be reproduced with this layer-wise homogenization procedure, an improved material model for the finite element analysis of the Lamb wave propagation is presented in this work. The used 2D plane strain state model considers the random distribution of fibers in the matrix material on the microscale by homogenized subdomains and thereby properly capture the "quasi-continuous mode conversion" effect. Numerical investigations of the influence of the material model on the developing wave modes in a unidirectional layer will complete the work. (C) 2016 Elsevier Ltd. All rights reserved.