Mechanical properties of unidirectional nanocomposites with non-uniformly or randomly staggered platelet distribution
Mechanical properties of unidirectional nanocomposites with non-uniformly or randomly staggered platelet distribution
复制标题
DOI：
10.1016/j.jmps.2010.07.004
复制
发表时间：
2010-10
影响因子：
5.3
通讯作者：
Zuoqi Zhang;Bin Liu;Yonggang Huang;K. Hwang;Huajian Gao
中科院分区：
文献类型：
--
作者：
Zuoqi Zhang;Bin Liu;Yonggang Huang;K. Hwang;Huajian Gao
具有平行交错增强的单向纳米复合材料广泛存在于天然生物材料中。本文研究了片状非均匀分布和随机分布的单向纳米复合材料的刚度、强度、破坏应变和储能能力。我们的研究表明，除了血小板的体积分数、形状和取向外，它们的分布也对单向纳米复合材料的力学性能起着重要的作用，可以用与血小板分布相关的四个无量纲参数来定量表征单向纳米复合材料的力学性能。研究发现，与其他分布相比，阶梯状和规则交错排列的血小板产生了总体上最平衡的力学性能，这可能是这些结构在自然界中被最广泛观察到的一个关键原因。
Unidirectional nanocomposite structures with parallel staggered platelet reinforcements are widely observed in natural biological materials. The present paper is aimed at an investigation of the stiffness, strength, failure strain and energy storage capacity of a unidirectional nanocomposite with non-uniformly or randomly staggered platelet distribution. Our study indicates that, besides the volume fraction, shape, and orientation of the platelets, their distribution also plays a significant role in the mechanical properties of a unidirectional nanocomposite, which can be quantitatively characterized in terms of four dimensionless parameters associated with platelet distribution. It is found that, compared with other distributions, stairwise and regular staggering of platelets produce overall the most balanced mechanical properties, which might be a key reason why these structures are most widely observed in nature.