Numerical Simulation of Nanoindentation of Single Wall Carbon Nanotube Reinforced Epoxy Composite
Numerical Simulation of Nanoindentation of Single Wall Carbon Nanotube Reinforced Epoxy Composite
复制标题
单壁碳纳米管增强环氧复合材料纳米压痕的数值模拟
DOI：
10.4028/www.scientific.net/amm.764-765.66
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Shyh
中科院分区：
文献类型：
--
作者：
Le Minh Tai;Shyh
聚合物/碳纳米管纳米复合材料因其优异的力学和电学性能而引起了人们的广泛研究和商业兴趣。表征这些纳米复合材料的力学性能一直是一个挑战。本研究旨在发展具有代表性的体积元方法来模拟具有非线性弹性响应的环氧/单壁碳纳米管(SWCNTs)纳米复合材料的纳米压痕行为。进行了一系列二维数值模拟，得到了弹塑性材料的应力-应变曲线和载荷-位移响应。结果表明，纳米压痕有限元模型能够较好地模拟环氧树脂/单壁碳纳米管纳米复合材料的加载-卸载响应。此外，还研究了啮合几何、压头半径和摩擦系数等因素对载荷-位移响应的影响。此外，这些模拟结果与文献中的实验数据吻合得很好。研究结果对今后研究聚合物/碳纳米管纳米复合材料的硬度、弹性模量等纳米尺度材料性能具有重要的参考价值。
Polymer/Carbon nanotube nanocomposites have attracted major research and commercial interests due to their superior mechanical and electrical properties. Characterizing mechanical properties of these nanocomposites has been always a challenge. The present study is to develop representative volume element method for modeling of nanoindentation behavior of Epoxy/Single wall carbon nanotubes (SWCNTs) nanocomposites that have nonlinear elastic reponse using finite element analysis. A series of two dimensional simulations were done to obtain stress-strain curve and load-displacement response of elastic-plastic material. The results indicated that the nanoindentation finite element models were able to simulate the loading-unloading responses of the Epoxy/SWCNTs nanocomposites. Besides, the relative influences on the load-displacement response are investigated, including mesh geometry, indenter radius and friction coefficient. Furthermore, these simulated results show good agreement with experimental data from literature. The reasearch results are very useful for studying the nanosize scale material properties such as hardness as well as elastic modulus of Polymer/Carbon nanotube nanocomposite in the future.