碳纤维在高应变率下的断裂机理

High Strain Rate Tensile Fracture of Carbon Fiber

利用反射式间接拉伸Hopkinson杆实验装置对碳纤维进行高应变率拉伸。通过扫描电子显微镜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 ,断裂破坏各不相同 ,但其断口形态逐渐光滑。

s: The high strain rate tensile tests of carbon filament yarn are carried out by using SHPB that from modified SHPB. The fractograph of carbon fibers fractured are also photographed by SEM. The test results show that the fracture texture of carbon fiber bundles is rate-dependent. The fractograph of carbon will become smooth from coarse as the strain rate increases.