Elastic–viscoplastic behavior of plain-woven GFRP laminates: Homogenization using a reduced domain of analysis
Elastic–viscoplastic behavior of plain-woven GFRP laminates: Homogenization using a reduced domain of analysis
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DOI：
10.1016/j.compstruct.2006.02.008
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发表时间：
2007-08
影响因子：
6.3
通讯作者：
T. Matsuda;Y. Nimiya;N. Ohno;M. Tokuda
中科院分区：
文献类型：
--
作者：
T. Matsuda;Y. Nimiya;N. Ohno;M. Tokuda
在本研究中，提出了一种减少分析域的方法，用于平织层压板的均匀化分析。为此，首先证明了在假定平纹织物具有同相或异相层合结构的情况下，平纹织物的内部结构满足点对称；然后将点对称性用于单元胞问题的边界条件，将同相层压结构的分析域分别减少到1/4和1/8。基于非线性时变复合材料的均质化理论，采用该方法分析了GFRP平纹编织层合板的面内弹粘塑性变形。此外，在室温条件下，对GFRP平纹编织层合板进行了恒定应变速率的面内单轴拉伸试验。结果表明，本文的分析成功地预测了GFRP平纹编织层合板的面内弹粘塑性行为。结果还表明，平纹织物的层合结构对层合板的粘塑性性能有影响，而对其弹性性能没有影响。
In this study, a method for reducing the domain of analysis is developed for the homogenization analysis of plain-woven laminates. To this end, it is first shown that the internal structures of plain-woven laminates satisfy point-symmetry on the assumption that the laminates have the in-phase or out-of-phase laminate configuration of plain fabrics. The point-symmetry is then utilized for the boundary condition of unit cell problems, reducing the domain of analysis to 1/4 and 1/8 for the in-phase and out-of-phase laminate configurations, respectively. Using the present method, the in-plane elastic–viscoplastic deformation of plain-woven GFRP laminates is analyzed based on the homogenization theory of nonlinear time-dependent composites. Moreover, the in-plane uniaxial tensile tests of a plain-woven GFRP laminate at a constant strain rate are performed at a room temperature. It is thus shown that the present analysis successfully predicts the in-plane elastic–viscoplastic behavior of plain-woven GFRP laminates. It is also shown that the laminate configurations of plain fabrics exert an influence on the viscoplastic behavior of laminates, not their elastic behavior.