第22卷第9期 2014年9月
文章编号
1004-924X(2014)09-2458-07
光学精密工程
Optics and Precision Engineering
Vol.22No.9
Sept.2014
碳纳米管增强聚合物复合材料的界面脱黏及应力分布
周丽军1,2，郭建刚1·，亢一澜1
（1.天津大学机械工程学院天津市现代工程力学重点实验室，天津300072；
2.天津职业技术师范大学机械工程学院，天津300222）
摘要：碳纳米管和复合材料基体间的界面力学行为是影响复合材料宏观力学性能的重要因索，为此本文利用有限单元法对单壁碳纳米管增强聚合物复合材料的界面脱黏、切应力分布及拨出载荷进行了数值模拟。建立了一个轴对称三圆柱壳模型，引人ABAQUS中的Cohesive单元模拟了单壁碳纳米管和聚合物基体之间的界面层，分析了单壁碳纳米管的长细比、界面强度以及热残余应力等因素对碳纳米管与聚合物基体间的界面切应力以及拔出载荷的影响，模拟结果表明：当单整碳纳米管的长度变化为50~100nm、与基体之间的界面强度为50~100MPa、环境温度变化为100C时，碳缩米管的长细比、界面强度以及由于热失配所引起的残余应力对单壁碳纳米管与聚合物基体间的界面切应力以及出载荷有着显著的影响。
关键调：碳纳来管；聚合物，复合材料；累面脱粘残余应力
中图分类号：TB332;TB383
文献标识码：A
doi;10.3788/OPE.20142209.2458
Interfacial debonding and stress characteristics of carbon
nanotubereinforcedpolymercomposites ZHOU Li-jun'", GUO Jian-gang'', KANG Yi-lan
(l.Tianjin Key Laboratory of Modern Engineering Mechanics,
School ofMechanical Engineering，TianjinUniversity，Tianjin300072，China;
2.School of Mechanical Engineering,Tianjin University of
Technologyand Education，Tianjin 300222,China) Correspondingauthor,E-mail:guojg@tju.edu.cn
Abstract:The interfacial mechanical behavior between Carbon Nanotubes （CNT）and composite matrices has great influence on the mechanical properties of composites, so numerical simulations based on finite element methods were presented to investigate the interfacial debonding, shear stress distributionsand pulloutforcesofSingle-walled Carbon Nanotube（SWCNT）reinforced polymer composites. An axisymmetric three-cylinder model was presented, and a cohesive model was applied to simulation of the interfacial layer between the SWCNTs and polymer matrix, The influence of the aspect ratio of SWCNTs, interfacial strength and the residual stress induced by Thermal Expansion Coefficient (TEC) mismatch on the interfacial shear stress and debonding were discussed. The results
收稿日期：2013-10-17；修订日期；2013-12-13.
基金项目：国家自然科学基金资助项目（No，11372216)；国家973重点基础研究发展计划资助项目（No
2012CB937500)