在用复合板补丁的剪切力下缺陷板的行为-一种新的工程方法
Yuri Simanovskii1, Haim Abramovich1
1Technion Faculty of Aerospace Engineering, Israel Institute of Technology, I.I.T., Haifa 32000, Israel.
Materials (Basel, Switzerland)
|September 13, 2025
概括
本研究涉及在剪切应力下修复老化的飞机机身面板. 使用一种新的有限元素 (FE) 方法,它验证了复合材料补丁修复,并推3D元素以提高结构分析的准确性.
科学领域:
- 航空航天工程 航空航天工程
- 材料科学 材料科学 材料科学
- 结构力学 结构力学
背景情况:
- 20世纪70年代的老旧飞机需要修理才能继续安全运行.
- 层状复合材料由于耐用性而被青用于修复制飞机部件.
- 现有的研究主要针对拉力负荷,忽视机身扭转中的剪切负荷.
研究的目的:
- 在纯切削负荷下调查缺陷板的行为.
- 解决有关飞机机身维修中剪切式加载的文献上的空白.
- 评估复合材料补丁修复机身面板在剪切下的有效性.
主要方法:
- 开发了一个新的有限元素 (FE) 模型,使用2D和3D元素来模拟缺陷的板在剪切下.
- 分析了维修补丁参数 (大小,重叠,序列) 和结构性质对面板强度和稳定性的影响.
- 通过对修复过的元件进行实验测试,验证了FE模型的预测.
主要成果:
- 有限元素方法 (FEM) 准确地预测了经过修复的板在剪切下的行为.
- 实验验证证了FE模型的忠实性和复合贴片修复的有效性.
- 该研究表明了各种维修参数对结构性能的影响.
结论:
- 复合贴片修复是一种可行的方法,用于解决老化的飞机机身面板中剪切引起的缺陷.
- 在FE建模中使用固体 (3D) 元素为此应用提供了与外 (2D) 元素相比更高保真度的结果.
- 这项研究通过改进的维修策略,为老旧飞机的安全和延长使用寿命做出了贡献.
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