Strengthening Effects in Nano-/Ultrafine-Grained Carbon Nanotube Reinforced-Titanium Composites Investigated by Finite Element Modeling
Strengthening Effects in Nano-/Ultrafine-Grained Carbon Nanotube Reinforced-Titanium Composites Investigated by Finite Element Modeling
复制标题
通过有限元模型研究纳米/超细晶碳纳米管增强钛复合材料的强化效果
DOI：
10.1007/s11661-018-4945-0
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发表时间：
2018-10
影响因子：
2.8
通讯作者：
Jürgen Eckert
中科院分区：
文献类型：
--
作者：
Fengxian Li;Peidong Hao;Jianhong Yi;Konda Gokuldoss Prashanth;Tapabrata Maity;Jürgen Eckert
基于位错穿孔区（DPZ）模型，从碳纳米管增强和基体晶粒细化两个方面研究了纳米/超细晶碳纳米管增强钛（CNT/Ti）复合材料的强化效应。考虑到DPZ中约束的几何必要位错，CNT/Ti复合材料被视为由CNT、DPZ和纯基体组成的三相复合材料。采用Clyne方法，通过有限元建模预测了碳纳米管/钛复合材料的整体真应力-真应变关系。预测结果与实验结果吻合较好。研究了碳纳米管直径、长径比、体积分数以及基体晶粒尺寸对碳纳米管/钛复合材料强化机制的影响。结果表明，基体的晶粒细化提高了整体强度，同时降低了碳纳米管引起的热膨胀失配强化。结果表明，增加碳纳米管的长径比和体积分数，减小基体晶粒尺寸和碳纳米管直径，可以提高复合材料的强度。这项工作提出了一种方法，可以很容易地允许使用现成的有限元软件来获得复合材料的整体力学响应，并有助于设计具有优异的力学性能的复合材料。
The strengthening effects in nano-/ultrafine-grained carbon nanotube reinforced-titanium (CNT/Ti) composites are investigated based on the dislocation punched zone (DPZ) model from two aspects: CNT reinforcement and matrix grain refinement. Considering the geometrically necessary dislocations constrained in DPZs, the CNT/Ti composites are treated as three-phase composites consisting of CNTs, the DPZs, and the pure matrix. By using the Clyne method, the overall true stress–true strain relations of the CNT/Ti composites are predicted by finite element modeling. The predictions agree well with the experimental results. Then, the influences of the diameter, the aspect ratio, and the volume fraction of CNTs, as well as the matrix grain size, on the strengthening mechanisms in CNT/Ti composites are investigated. The results show that the grain refinement of the matrix increases the overall strength and simultaneously decreases the thermal expansion mismatch strengthening induced by CNTs. It can be concluded that the strength of CNT/Ti composites can be enhanced by increasing the aspect ratio and the volume fraction of CNTs, as well as by decreasing the matrix grain size and the diameter of CNTs. This work presents a method to easily allow the use of readily available finite element software to obtain the overall mechanical response of composites and helps to design composites with excellent mechanical properties.
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DOI：
10.1016/j.msea.2009.07.067
发表时间：
2009-12
影响因子：
6.4
作者：
Ying Li;Yonghao Zhao;V. Ortalan;Wei Liu;Zhihui Zhang;R. Vogt;N. Browning;E. Lavernia;J. Schoenu
通讯作者：
Ying Li;Yonghao Zhao;V. Ortalan;Wei Liu;Zhihui Zhang;R. Vogt;N. Browning;E. Lavernia;J. Schoenu
影响因子：
6
作者：
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通讯作者：
Jichun Ye;B. Han;Zonghoon Lee;B. Ahn;S. Nutt;J. Schoenung
DOI：
10.1007/s11661-998-1022-0
发表时间：
1998
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
K. Hamada;J. Lee;K. Mizuuchi;M. Taya;K. Inoue
通讯作者：
K. Hamada;J. Lee;K. Mizuuchi;M. Taya;K. Inoue
影响因子：
10.9
作者：
Park, Jong Gil;Keum, Dong Hoon;Lee, Young Hee
通讯作者：
Lee, Young Hee
影响因子：
6
作者：
S. Yoo;Seunghee Han;W. Kim
通讯作者：
S. Yoo;Seunghee Han;W. Kim