A studying on load transfer in carbon nanotube/epoxy composites under tension
A studying on load transfer in carbon nanotube/epoxy composites under tension
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DOI：
10.1515/jmmm-2016-0153
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
N. Viet;Q. Wang;W. Kuo
中科院分区：
文献类型：
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作者：
N. Viet;Q. Wang;W. Kuo
摘要建立了剪切滞后模型，研究了环氧树脂和碳纳米管的几何形状和材料性能对拉伸下碳纳米管/环氧树脂复合材料载荷传递的影响。用有限元法和Haque模型对剪切滞后模型的结果进行了验证。结果表明，碳纳米管半长与外半径的长径比和碳纳米管层数对复合材料的载荷传递有显著影响。另一方面，本研究也揭示了前人未见的新发现。即环氧树脂杨氏模量和环氧树脂基体与碳纳米管层之间的界面剪切模量对饱和应力长度的载荷传递没有明显的影响。此外，碳纳米管体积百分比对负载传递没有影响。本研究对碳纳米管/环氧复合材料的力学性能有了较好的认识。
Abstract The shear-lag model is developed to study the effect of geometry and material properties of epoxy and carbon nanotubes on load transfer in carbon nanotube/epoxy composites under tension. The results from proposed shear-lag model are validated by finite element method and the Haque’s model. Results show that the aspect ratio of the half-length to the outer radius of carbon nanotubes and their layer number have significant influence on load transfer in the composites. On the other hand, this research reveals new findings, which are not reported in other previous works. That is, no noticeable influences of the epoxy Young’s modulus and the interface shear modulus between epoxy matrix and carbon nanotube layers are found on load transfer in terms of the saturated stress length. In addition, the carbon nanotube volume percentage is found not affecting the load transfer. This research presents a better understanding on mechanical properties of carbon nanotube/epoxy composites.