关于使用X射线和声学发射技术回收碳主纤维的损害行为的第一个结论
Christian Becker1, Joachim Hausmann1, Janna Krummenacker1
1Leibniz-Institut für Verbundwerkstoffe GmbH, 67663 Kaiserslautern, Germany.
Materials (Basel, Switzerland)
|July 14, 2023
概括
循环碳纤维 (rCF) 环绕材料对承载结构具有前景,可实现高机械性能. 然而,观察到纤维-矩阵粘附性较差,需要进一步研究损伤机制.
科学领域:
- 材料科学 材料科学 材料科学
- 复合材料工程 复合材料工程
- 机械工程 机械工程
背景情况:
- 循环碳纤维 (rCF) 越来越多地被探索为原始碳纤维的可持续替代品.
- 了解rCF复合材料的损伤行为对于它们在承载结构中的应用至关重要.
研究的目的:
- 为了描述由rCF rovings制成的单向增强板的损伤行为.
- 评估rCF复合材料的机械性能和故障机制.
- 为了研究纤维矩阵粘附,并将损伤行为与传统复合材料进行比较.
主要方法:
- 机械测试 (拉伸,曲,压缩) 用于确定材料性能.
- 扫描电子显微镜 (SEM) 用于断裂表面分析和纤维矩阵粘附度评估.
- 在横向拉伸和曲负荷下的现场X射线显微镜可视化纤维拉伸和纤维间故障等损伤机制.
- 在现场设置中集成的声辐射 (AE) 分析.
主要成果:
- rCF UD板具有很高的机械性能,拉力模量高达80 GPa,拉力强度为800 MPa,表明可用于承载应用.
- 在不同的矩阵系统中,一致观察到纤维-矩阵粘附性差.
- 在现场的X射线显微镜揭示了详细的故障机制,包括纤维拉出和纤维间故障,在横向拉伸测试中发现了良性行为.
- 将AE分析集成到in situX射线显微镜中的初始概念已成功测试.
结论:
- rCF rovings可以制造成具有竞争力的机械性能,适合结构应用的UD板.
- 确定的主要限制是纤维-矩阵粘附性差,这影响了复合材料的整体损伤行为.
- 在现场的X射线显微镜为rCF复合材料的损伤机制提供了宝贵的见解,有助于其设计和优化.
- 需要进一步的研究来改善纤维矩阵粘附性,并充分利用再生碳纤维的潜力.
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