Dynamic Tensile Behavior and Fracture Mechanism of Polymer Composites Embedded with Tetraneedle-Shaped ZnO Nanowhiskers
Dynamic Tensile Behavior and Fracture Mechanism of Polymer Composites Embedded with Tetraneedle-Shaped ZnO Nanowhiskers作者机构：School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 School of Material Science and Engineering Beijing Institute of Technology Beijing 100081
出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)
年 卷 期：2010年第27卷第6期
页 面：144-147页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：Supported by the National Natural Science Foundation under Grant Nos 10672020 and 50742007
主 题：FRACTURE mechanics POLYMERIC composites ZINC oxide NANOSTRUCTURED materials CRYSTAL whiskers BARS (Engineering) ELASTICITY NONLINEAR theories MATERIALS -- Mechanical properties
摘 要：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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