Chinese Physics Letters · 2010 · 11 citations · 20 references
Natural SciencesMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsPolymer EngineeringPolymer MaterialsComposite MaterialsFracture MechanicsMechanics Of Composite MaterialsStrain Rate EffectsStrengthening MechanismsStress-strain BehaviorComposite Constitutive ModelingComposite Mechanical PropertiesDynamic Mechanical LoadingElastic ModulusStrain-rate DependenceStress-strain AnalysisStress-strain CurveStress-strain Relations
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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