Dynamic Tensile Behavior and Fracture Mechanism of Polymer Composites Embedded with Tetraneedle-Shaped ZnO Nanowhiskers
RONG Ji-Li1,WANG Xi1, CAO Mao-Sheng2, WANG Da-Wei2, ZHOU Wei2, XU Tian-Fu1
1School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081 2School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081
Dynamic Tensile Behavior and Fracture Mechanism of Polymer Composites Embedded with Tetraneedle-Shaped ZnO Nanowhiskers
RONG Ji-Li1,WANG Xi1, CAO Mao-Sheng2, WANG Da-Wei2, ZHOU Wei2, XU Tian-Fu1
1School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081 2School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081
Dynamic tensile properties of glass-fiber polymer composites embedded with ZnO nanowhiskers are investigated by a split Hopkinson tensile bar. The stress-strain curves, ultimate strength, failure strain and elastic modulus are obtained and the failure mechanism of the composites is investigated by the macroscopic and microscopic observation of fractured specimens. The strain rate effect on the mechanical behavior is discussed and a constitutive model is derived by simulating the experimental data. The experimental results show that the materials have an obvious non-linear constitutive relation and strain rate strengthening effect. The composites with ZnO nanowhiskers under dynamic loading have various failure modes and better mechanical properties.
Dynamic tensile properties of glass-fiber polymer composites embedded with ZnO nanowhiskers are investigated by a split Hopkinson tensile bar. The stress-strain curves, ultimate strength, failure strain and elastic modulus are obtained and the failure mechanism of the composites is investigated by the macroscopic and microscopic observation of fractured specimens. The strain rate effect on the mechanical behavior is discussed and a constitutive model is derived by simulating the experimental data. The experimental results show that the materials have an obvious non-linear constitutive relation and strain rate strengthening effect. The composites with ZnO nanowhiskers under dynamic loading have various failure modes and better mechanical properties.
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2010, Vol. 27 
