Numerical predictions of the mechanical properties of NT-ZnOw reinforced composites
Numerical predictions of the mechanical properties of NT-ZnOw reinforced composites
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DOI：
10.1016/j.commatsci.2014.09.002
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发表时间：
2015
影响因子：
3.3
通讯作者：
J. Rong;Zhengtao Gan;Dan Wang;M. Cao
中科院分区：
文献类型：
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作者：
J. Rong;Zhengtao Gan;Dan Wang;M. Cao
提出了一种制备空间随机分布的三维纳米四针状氧化锌晶须（NT-ZnOw）的新方法，并开发了相应的程序。将晶须生成程序与有限元方法相结合，建立了三维有限元模型，预测了NT-ZnOw/树脂复合材料的力学性能。采用三维有限元单胞模型，在周期位移边界条件下研究了NT-ZnOw/树脂复合材料的等效力学性能。还开发了含有不同体积分数的NT-ZnOw增强复合材料的细观力学有限元模型。研究了晶须体积分数和长径比对复合材料刚度的影响。这些参数可以用于微观预测和分析，以确定晶须增强复合材料的力学性能的多元和随机分布的晶须。数值计算和理论预测是一致的。
A new method to generate a three-dimensional (3D) nanoscale tetrapod-shaped zinc oxide whisker (NT-ZnOw) with spatial random distribution is proposed, and a corresponding program is developed. A whisker-generating program is combined with finite element method to build a 3D finite element model that can predict the mechanical properties of NT-ZnOw/resin composites. A 3D finite-element unit cell is adopted and subjected to periodic displacement boundary conditions to explore the equivalent mechanical properties of the NT-ZnOw/resin composites. A micromechanics finite element model of the NT-ZnOw reinforced composites containing various volume fractions of NT-ZnOw is also developed. Effects of different volume fractions and aspect ratios of the whisker on the stiffness of the composites are investigated. These parameters can be used in the microscopic prediction and analysis to determine the mechanical properties of whisker-reinforced composites with multivariate and random distribution of the whiskers. The numerical and theoretical predictions are in good concordance.