Abstract Strain rate dependent characterizations of glass fiber reinforced thermoplastic (LFT) under different multiaxialities show an increasing fracture strain and higher energy absorption capacity if the loading rate rises. The present paper gives a clue for the underlying micro-thermo-mechanical mechanisms of this effect. The method of correlating experimental field information of strain and heat generation provides data for advanced analysis. Strain and heat distribution of the deformation zone as well as a hot-spot occurrence display give hints on expanded damage zones at high strain rates. Quasi-static and dynamic interrupted tensile tests provided data to investigate the damage evolution. Scanning electron microscopic (SEM) images show differences in the area between fiber and matrix depending on the strain rate. Based on SEM images and correlated and analyzed field data a model representation was established that presents, in agreement with the literature, a perception of the damage mechanisms in the interface and its consequences for global deformation.

中文翻译：

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长玻璃纤维增​​强聚丙烯中应变率相关的损伤演变

摘要 玻璃纤维增​​强热塑性塑料（LFT）在不同多轴度下的应变率相关表征表明，如果加载率增加，断裂应变会增加，能量吸收能力也会增加。本文为这种效应的潜在微热机械机制提供了线索。将应变和发热的实验场信息相关联的方法为高级分析提供数据。变形区的应变和热分布以及热点出现显示提供了高应变率下扩展损伤区的提示。准静态和动态间断拉伸试验为研究损伤演变提供了数据。扫描电子显微镜 (SEM) 图像显示纤维和基体之间的面积因应变速率而异。