Polycarbonate composites are widely used in products exposed to high strain rate deformation. This paper investigates the thermomechanical properties of polycarbonate and 20 wt% glass fibre reinforced polycarbonate to provide characterisation data and improved mechanistic understanding of the response to load, supported by Dynamic Mechanical Analysis and time–temperature superposition. Compressive behaviour is characterised from 0.001 to 5000 s at room temperature and from −60 to 120 °C at 0.01 s; and a thermal imaging camera used to obtain temperature rise data. Quasi-static tensile experiments were also performed in different orientations relative to the injection flow direction. High-rate compression experiments are performed with X-ray imaging. As well as information about rate dependence of yield stresses and softening in the two materials, these data show how adiabatic shear band formation can cause significant softening in the composite. These data will enhance application of these polymers and facilitate development of advanced thermo-mechanical models.

中文翻译：

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热塑性聚合物及其短玻璃纤维增​​强复合材料的热机械特性：纤维、纤维取向、应变率和温度的影响

聚碳酸酯复合材料广泛用于承受高应变率变形的产品。本文研究了聚碳酸酯和 20 wt% 玻璃纤维增​​强聚碳酸酯的热机械性能，以提供表征数据并改进对负载响应的机械理解，并得到动态力学分析和时间-温度叠加的支持。室温下的压缩行为为 0.001 至 5000 秒，-60 至 120 °C 为 0.01 秒；以及用于获取温升数据的热像仪。还在相对于注射流方向的不同方向上进行了准静态拉伸实验。通过 X 射线成像进行高速压缩实验。除了有关两种材料的屈服应力和软化的速率依赖性的信息之外，这些数据还显示了绝热剪切带的形成如何导致复合材料的显着软化。这些数据将增强这些聚合物的应用并促进先进热机械模型的开发。