Hybrid carbon/glass composite rods consisting of unidirectional polyacrylonitrile (PAN)‐based carbon fiber (T700SC), braided E‐glass fibers, and thermoplastic epoxy matrix were fabricated with differing carbon/glass ratios (24K1P, 24K2P, and 24K3P). The cross‐sectional morphologies of the hybrid rods were observed using a digital microscope. Tensile properties and fracture behavior of the hybrid rods were investigated over a range of temperatures: −50°C, 0°C, 23°C (RT), 50°C, and 80°C. The tensile modulus and strength increased with increasing carbon fiber volume fraction, but decreased with increasing temperature. The Weibull statistical distribution of tensile strength for the hybrid rods was examined. The Weibull modulus increased with increasing tensile strength and decreasing void volume fraction of the hybrid rods. A Curtin‐type global load‐sharing model was applied to the hybrid rods to predict mechanical properties at different temperatures.

中文翻译：

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碳/玻璃混合热塑性复合棒的温度依赖性拉伸性能

碳/玻璃混合复合棒由单向聚丙烯腈（PAN）基碳纤维（T700SC），编织的电子玻璃纤维和热塑性环氧基质制成，具有不同的碳/玻璃比率（24K1P，24K2P和24K3P）。使用数字显微镜观察了混合棒的横截面形态。在−50°C，0°C，23°C（RT），50°C和80°C的温度范围内研究了混合棒的拉伸性能和断裂行为。拉伸模量和强度随碳纤维体积分数的增加而增加，但随温度的升高而降低。检查了混合棒的拉伸强度的威布尔统计分布。威布尔模量随着抗拉强度的增加和混合棒空隙体积分数的减小而增加。