Dynamic Mechanical Behavior and Failure Mechanism of Polymer Composites Embedded with Tetraneedle-Shaped ZnO Whiskers  

作　　者：RONG Ji-Li WANG Dan WANG Xi LI Jian XU Tian-Fu LU Ming-Ming CAO Mao-Sheng 荣吉利;王丹;王玺;李健;徐天富;卢明明;曹茂盛(Department of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081;Beijing Institute of Space Launch,Beijing 100076;Department of Automobile and Transportation Engineering,Guangxi University of Science Technology,Liuzhou 545006;Department of Material Science and Engineering,Beijing Institute of Technology,Beijing 100081)

机构地区：[1]Department of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081 [2]Beijing Institute of Space Launch,Beijing 100076 [3]Department of Automobile and Transportation Engineering,Guangxi University of Science Technology,Liuzhou 545006 [4]Department of Material Science and Engineering,Beijing Institute of Technology,Beijing 100081

出　　处：《Chinese Physics Letters》2013年第1期135-139,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10672020 and 50742007.

摘　　要：Quasi-static and dynamic mechanical properties of glass-fiber reinforced polymer composites embedded with and without tetraneedle-shaped ZnO whiskers(T-ZnOw)in two loading directions are investigated by a split Hopkinson pressure bar.The stress-strain curves,ultimate strength,failure strain and elastic modulus are obtained and the failure mechanism of the composites is investigated by a high-speed camera and a scanning electron microscope.Strain rate effects on the mechanical behavior are discussed and the corresponding models are derived by fitting the experimental data.The experimental results show that the composites with T-ZnOw under dynamic loading have multiple failure modes and better mechanical properties.Finally,the strengthening and toughening mechanisms of T-ZnOw are analyzed.It is shown that T-ZnOw can improve mechanical properties of the composites,and can make the composites have some new features.The present results provide a reliable basis for advanced composite design and manufacture,and have broad applications in the field of aerospace.

关 键 词：COMPOSITES NEEDLE LOADING 

分 类 号：TB3[一般工业技术—材料科学与工程]