Elasto-viscoplastic analysis for negative through-the-thickness Poisson’s ratio of woven laminate composites based on homogenization theory
Elasto-viscoplastic analysis for negative through-the-thickness Poisson’s ratio of woven laminate composites based on homogenization theory
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DOI：
10.1016/j.ijmecsci.2017.11.045
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发表时间：
2017-12
影响因子：
7.3
通讯作者：
K. Goto;M. Arai;T. Matsuda;Gai Kubo
中科院分区：
文献类型：
--
作者：
K. Goto;M. Arai;T. Matsuda;Gai Kubo
本文基于弹粘塑性材料均匀化理论，对[±θ]机织层合板的负泊松比进行了分析。考虑了纤维束交叉角为±θ的[±θ]机织层合板模型，定义了菱形分析域。采用弹粘塑性均匀化分析方法研究了碳纤维/环氧树脂和玻璃纤维/环氧树脂编织层合板的泊松比为负值的情况。[±30°]碳纤维/环氧编织层压板的全厚度泊松比在弹性和粘塑性区域均为负值。而[±30°]玻璃纤维/环氧编织层合板在弹性区为正值，在粘塑性区为负值。[±30°]机织层合板的负泊松比是由相对于面内方向的压应力和基体的粘塑性变形引起的。
In this study, the negative through-the-thickness Poisson’s ratios of [±θ] woven laminates were analyzed based on the homogenization theory for elasto-viscoplastic materials. A [±θ] woven laminate model with the fiber bundle cross angle ±θwas considered and its diamond-shaped domain of analysis was defined. The elasto-viscoplastic homogenization analysis was performed to investigate the negativity of the through-the-thickness Poisson’s ratios for the [±θ] carbon fiber/epoxy and glass fiber/epoxy woven laminates. The through-the-thickness Poisson’s ratio of the [±30°] carbon fiber/epoxy woven laminate was negative in both the elastic and viscoplastic regions. However, that of the [±30°] glass fiber/epoxy woven laminate was positive in the elastic region but became negative in the viscoplastic region. The negative through-the-thickness Poisson’s ratios of the [±30°] woven laminates were caused by the compressive stress with respect to the in-plane direction and the viscoplastic deformation of the matrix.