高应变率下玄武岩纤维和芳纶纤维拉伸断裂机理的研究
首发时间:2011-03-09
摘要:利用分离式Hopkinson拉杆实验装置,测试玄武岩纤维和芳纶纤维在高应变率下的拉伸性质。实验表明两种纤维都是应变率敏感性材料,在扫描电子显微镜下,玄武岩纤维的断裂模式为脆性断裂,断裂横截面随着应变率的提高而趋于规整;而芳纶纤维的断裂模式为韧性断裂,随着应变率的提高,纤维产生明显的原纤化效应。
关键词: 纺织材料 玄武岩纤维 芳纶纤维 SHTB装置 拉伸性能 应变率
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A Study on the Fracture Mechanism of Basalt Filament and Twaron Fiber Tows under High Strain Rate Tensile
Abstract:The tensile experiments of basalt ?lament and Twaron fiber tows at high strain rates were carried out with split Hopkinson tension bar (SHTB). Experimental results showed that the mechanical properties of the basalt Filament tows were rather sensitive to strain rate. From scanning electronic microscope (SEM) photographs of the fracture surface, it is indicated that the basalt ?lament tows failed in a more brittle mode and the fracture surface got more regular as the strain rate increases. While the Twaron fiber tows failed in a more tough mode and the axial split will become more severe as the strain rate increases.
Keywords: Textile materials Basalt Filament Tows Twaron fiber tows Tensile Properties Strain Rates SHTB
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高应变率下玄武岩纤维和芳纶纤维拉伸断裂机理的研究
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