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Mechanical Characterization of the Tensile Properties of Glass Fiber and Its Reinforced Polymer (GFRP) Composite under Varying Strain Rates and Temperatures

机译:在不同的应变速率和温度下玻璃纤维及其增强聚合物(GFRP)复合材料的拉伸性能的力学特性

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摘要

Unidirectional glass fiber reinforced polymer (GFRP) is tested at four initial strain rates (25, 50, 100 and 200 s−1) and six temperatures (−25, 0, 25, 50, 75 and 100 °C) on a servo-hydraulic high-rate testing system to investigate any possible effects on their mechanical properties and failure patterns. Meanwhile, for the sake of illuminating strain rate and temperature effect mechanisms, glass yarn samples were complementally tested at four different strain rates (40, 80, 120 and 160 s−1) and varying temperatures (25, 50, 75 and 100 °C) utilizing an Instron drop-weight impact system. In addition, quasi-static properties of GFRP and glass yarn are supplemented as references. The stress–strain responses at varying strain rates and elevated temperatures are discussed. A Weibull statistics model is used to quantify the degree of variability in tensile strength and to obtain Weibull parameters for engineering applications.
机译:单向玻璃纤维增​​强聚合物(GFRP)在四个初始应变速率(25、50、100和200 s -1 )和六个温度(−25、0、25、50、75和100)下进行测试°C)在伺服液压高速测试系统上,以研究对其机械性能和故障模式的任何可能影响。同时,为了阐明应变率和温度影响机理,对玻璃丝样品分别在四种不同的应变率(40、80、120和160 s -1 )和变化的温度(25, 50、75和100°C)使用Instron落锤冲击系统。此外,还补充了GFRP和玻璃丝的准静态性能。讨论了在不同的应变速率和升高的温度下的应力应变响应。威布尔统计模型用于量化抗拉强度的变化程度,并获得用于工程应用的威布尔参数。

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