碳纤维高应变率拉伸破坏形态的应变率效应性质  

Strain Rate-dependent Fractograph of Carbon Fiber under High Strain Rate Tensile

作　　者：孙宝忠[1] 顾伯洪[1] 

机构地区：[1]东华大学纺织学院,上海200051

出　　处：《东华大学学报（自然科学版）》2005年第1期124-127,共4页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金项目资助(项目编号: 19902016)

摘　　要：利用反射式间接拉伸Hopkinson杆实验装置,测试碳纤维在应变率1500～3000s-1范围内的拉伸性质.实验结果表明,碳纤维在拉伸性质上是应变率不敏感材料,这与目前已有实验资料一致,但对碳纤维断裂端的断口形状观测表明,碳纤维破坏形态是与应变率相关的,随着应变率的增加,断口形态逐渐光滑.破坏形态的差异也导致了拉伸力学性质在不同应变率下的微弱差异.The high strain rate tensile tests of carbon filament yarn are carried out by using SHPB that from modified SHPB. The stress-strain curves of carbon filament yarn at different strain rates are obtained. And the fractograph of carbon fibers fractured is also photographed by SEM. The test results show that the mechanical behavior of carbon fiber bundles is insensitive, which is similar to that of other literatures. However, the fracture texture of carbon fiber bundles is strain rate-dependent. The fractograph of carbon will become smooth from coarse as the strain rate increases.

关 键 词：碳纤维 高应变率拉伸 断口形态 

分 类 号：V258.3[一般工业技术—材料科学与工程]