Kevlar~964C纤维束拉伸性能的应变率和温度效应  

Strain rate and temperature dependence of tensile behavior of Kevlar~964C fiber bundles

作　　者：毛明忠[1] 熊杰[1] 杨斌[1] 熊涛[1] 周凯[1] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018

出　　处：《纺织学报》2008年第11期6-11,共6页Journal of Textile Research

基　　金：国家自然科学基金资助项目(10372092);长江学者和创新团队发展计划资助项目(IRT0654)

摘　　要：利用旋转盘式杆杆型冲击拉伸装置和万能试验机研究Kevlar964C纤维束拉伸性能的温度和应变率效应,得到Kevlar964C纤维束在不同应变率和温度条件下的应力与应变曲线。结果表明：Kevlar964C纤维束的拉伸性能与应变率和温度具有相关性。在相同的温度下,随着应变率的增加,纤维束的破坏应力、失稳应变、初始弹性模量、断裂应变能密度均有不同程度增加;在相同应变率下,随着温度的增加,破坏应力略有增加,失稳应变增加,初始弹性模量下降,断裂应变能密度增加。在试验基础上,分析了拉伸性能的应变率和温度效应机制。The tensile impact experiments were carried out at different strain rates and temperatures by using of Hopkinson bar- bar tensile impact apparatus and universal tester. The stress - strain curves were obtained based on one-dimension stress wave theory. The results showed that the tensile behavior of Kevlar 964C is strain rate and temperature dependent. At the same temperature, the failure stress, unstable strain, initial elasticty modulus and specific fracture strain energy density increase with increasing strain rate. At the same strain rate, the failure stress, unstable strain and specific fracture strain energy density increase with increasing temperature, but initial elasticty modulus decreases with increasing temperature. The mechanism of strain rate and temperature dependence of tensile behavior was analyzed based on the above experiments.

关 键 词：KEVLAR纤维 应变率 温度 拉伸性能 

分 类 号：TB332[一般工业技术—材料科学与工程]