关于复合蜂三明治结构的冲击损伤和维修
Hang Zhang1, Xiaopei Wang1,2, Zhenhan Guo2
1State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Materials (Basel, Switzerland)
|December 9, 2023
概括
这项研究调查了由低速度冲击造成的复合蜂三明治板损坏. 修复技术显著恢复力量,通过验证的模型预测损伤进展.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 复合蜂三明治结构在航空航天和汽车行业至关重要.
- 了解低速冲击造成的分层损伤对于结构完整性至关重要.
- 现有的模型可能无法完全捕捉这些结构中复杂的损伤机制.
研究的目的:
- 研究不同低速冲击能量的玻璃纤维增强复合材料蜂三明治结构中分层损伤的特征和规律.
- 探索有效的维修技术,并优化对分层损坏的工艺参数.
- 建立和验证这些结构的三维渐进损害分析模型.
主要方法:
- 低速撞击测试是在复合蜂三明治结构上进行的.
- 开发了一个三维渐进式损害分析模型.
- 用实验数据评估损伤特征并验证模型.
- 应用了修复技术,并量化了它们的有效性.
主要成果:
- 冲击能量与增加的分层损伤面积直接相关.
- 分层损伤从撞击点向外传播,并与此相关的纤维断裂和矩阵裂.
- 修复工作取得了显著的强度恢复率,在不同的冲击能量中从65.89%到71.90%不等.
- 建立的渐进式损伤模型准确地预测了撞击损伤.
结论:
- 该研究提供了对复合蜂三明治结构中分层损伤的全面了解,这些结构受到低速度冲击的影响.
- 开发的渐进性损伤模型为预测结构行为和损伤提供了可靠的工具.
- 探索的维修策略在恢复受损面板的结构完整性方面表现出相当大的有效性.
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