NSF: Fatigue, Damping and Impact Properties of Textile Composites

该项目将研究纺织复合材料的疲劳、阻尼和冲击性能，作为英国和美国六所大学合作的跨学科活动的一部分。正在考虑的材料包括热固性2D编织带（碳/玻璃混合环氧树脂），热塑性2D编织带（碳/芳纶预浸渍PA/TPU基体）和3D角度互锁编织带（也是预浸渍热塑性胶带）。在克兰菲尔德的工作将研究在新的瞬态试验下损伤复合材料的损伤起始和疲劳特性以及未损伤和损伤复合材料的阻尼特性。将对复合材料参数（编织角、斑块厚度、碳/玻璃束比）的疲劳和阻尼性能进行实验优化。实验结果将与英国和美国合作伙伴的实验结果进行比较。诺丁汉大学开发的预测三维单元有限元模型和美国合作伙伴开发的分析和有限元模型将通过与克兰菲尔德实验结果的比较，验证新的瞬态测试。

This project will study the fatigue, damping and impact properties of textile composites, as part of collaborative, interdisciplinary activities between six UK and US universities. Materials under consideration include thermoset 2D braids (carbon/glass hybrid with epoxy), thermoplastic 2D braids (carbon/aramid pre-impregnated with PA/TPU matrix), and 3D angle interlock weaves (also pre-impregnated thermoplastic tapes).Work at Cranfield will investigate experimentally damage initiation and fatigue properties of damaged composites under novel transient tests and damping properties of undamaged and damaged composites. Experimental optimization of composite parameters (braiding angle, plaque thickness, ratio of carbon/glass tows) for fatigue and damping properties will be undertaken.Experimental results will be compared with experimental results from both the UK and US partners.Predictive 3D unit cell FE models developed by the University of Nottingham and analytical and FE models developed by the US partner will be validated for novel transient tests by comparison with Cranfield experimental results.