围巾粘合在CFRP层上恢复强度的效果,造成冲击损伤
Xue Xiao1, Xuan Shanyong1, Fu Bin1
1State-owned Wuhu Machinery Factory, Wuhu 241007, China.
Heliyon
|August 28, 2023
概括
使用碳纤维/环氧复合材料进行围巾粘合修复,有效地恢复了受损层材的强度. 经过修复的结构在撞击后显示出高余强度,恢复了原始性能的97.7%.
科学领域:
- 材料科学 材料科学 材料科学
- 航空航天工程 航空航天工程
- 机械工程 机械工程
背景情况:
- 撞击损伤大大降低了航空航天复合结构的承载能力和寿命.
- 修复这种损坏对于保持结构完整性和运行安全至关重要.
研究的目的:
- 评估使用碳纤维/环氧复合材料 (ZT7H/EC3448) 修复碳纤维增强聚合物 (CFRP) 层材 (Z7TH/QY9611) 损坏后冲击损坏的围巾粘合的有效性.
- 评估修复后的CFRP层材的冲击损伤耐受性和冲击后压缩 (CAI) 性能.
主要方法:
- 使用ABAQUS开发了一个三维有限元模型 (FEM) 来模拟冲击反应和CAI.
- 实验测试包括对完整的和修复过的层材进行低速冲击和压缩测试.
- 分析的重点是冲击反应,故障模式和残余强度.
主要成果:
- 损坏始于冲击区域,并在完整的和修复的层材料中垂直向纤维方向传播.
- 修复补丁吸收了大量的冲击能量,最大限度地减少了底层CFRP层材的损坏.
- 湿接修复的层材恢复了完整的层材CAI性能的97.7%.
结论:
- 使用ZT7H/EC3448进行围巾粘合修复是一种可行的方法,用于恢复受冲击损坏的CFRP结构的强度.
- 修复显著提高了冲击能量吸收,并保持了剩余的压力强度.
- 这种维修技术为延长航空航天复合材料组件使用寿命提供了一个有希望的解决方案.
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