单向玻璃纤维增强环氧树脂在冲击拉伸时的一维本构方程

基金项目: 国家自然科学基金项目

ONE DIMENSIONAL CONSTITUTIVE EPUATIONON OF UNIDIRECTIONAL GLASSFIBER REINFORCED EPOXY UNDER TENSILE IMPACT

Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026

摘要

摘要: 本文在自行研制的冲击拉伸装置上首次实现了单向玻璃纤维增强环氧树脂的冲击拉伸加卸载试验,结合试件在冲击拉伸过程中的瞬态温升和能量分析的结果,提出了完整的复合丝束模型,推出了冲击拉伸时的一维本构方程;并对该材料在300～2000s-1的应变范围内进行了全面的冲击拉伸试验,通过对试验结果的数值统计分析和应变率相关性分析拟合出具体的本构方程,结果表明这个方程是有效的,有明显的物理意义.
- 冲击拉伸 /
- 本构方程 /
- 单向玻璃纤维增强环氧树脂 /
- 复合丝束
Abstract: The tensile impact loading-unloading test of unidirectional glass fiber reinforced epoxy are carried out on a self-designed tensile impact setup in the first time.Combined with the results of transient temperature rising and energy analysis under tensileimpact,a perfect composed bundle model is proposed and the one-dimensional constitutive equation under tensile impact is derived.Comprehensive tensileimpact tests in the strain rate range(300-2000 l/s)for that composite are carried on.The specific constitutive equation simulated from the statistical analysis and rate-dependence analysis of the testing results shows effective and possesses obvious physical meaning.
- tensileimpact /
- constitutive equation /
- u nidirectional glassfiber reinforced epoxy /
- composed bundle