Dynamic Tensile Behavior and Fracture Mechanism of Polymer Composites Embedded with Tetraneedle-Shaped ZnO Nanowhiskers

• Published in: Chinese physics letters Vol. 27; no. 6; pp. 144 - 147
• Main Authors: Ji-Li, Rong, Xi, Wang, Mao-Sheng, Cao, Da-Wei, Wang, Wei, Zhou, Tian-Fu, Xu
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.06.2010
• Subjects: Constitutive relationships; Nanocomposites; Nanomaterials; Nanostructure; Polymer matrix composites; Strain rate; Ultimate tensile strength; Zinc oxide; 动态拉伸性能; 嵌入式; 应力应变曲线; 断裂机理; 氧化锌晶须; 纳米晶须; 聚合物复合材料; 非线性本构关系
• ISSN: 0256-307X; 1741-3540
• DOI: 10.1088/0256-307X/27/6/066201

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.