一个带有修复节点的板块的疲劳寿命分析,经过均剪切
1Faculty of Mechatronics, Armament and Aerospace, Military University of Technology, 00-908 Warsaw, Poland.
Materials (Basel, Switzerland)
|February 13, 2026
概括
这项研究比较了使用金属和复合材料补丁在合金板上的飞机结构维修. 与传统的钉金属贴片相比,粘合复合材料贴片显著延长了疲劳寿命,并改善了结构完整性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 航空航天工程 航空航天工程
背景情况:
- 飞机结构,特别是合金组件,容易受到来自孔或材料损失的疲劳损伤.
- 这种损坏大大减少了疲劳寿命,并损害了结构安全,需要有效的维修策略.
研究的目的:
- 实验性地研究EN AW-2024-T3合金板的疲劳性能,在均剪切下具有中央开口.
- 评估传统的钉金属贴片与粘合粘合复合材料贴片在恢复疲劳寿命和结构完整性的有效性.
- 分析补丁几何形状,厚度和直径对负载转移,曲反应和疲劳寿命的影响.
主要方法:
- 对EN AW-2024-T3合金板的实验测试,中孔受到均的剪切.
- 应用和评估两种修复方法:钉金属贴片和粘合粘合复合材料贴片.
- 系统地改变补丁参数 (几何,厚度,直径) 以评估它们对结构性能的影响.
主要成果:
- 中心孔造成了显著的疲劳寿命减少 (20毫米为67%,50毫米为95%).
- 钉金属补丁部分恢复了性能,但引入了新的疲劳裂发起点.
- 粘合粘合复合材料补丁大大延长了疲劳寿命,改善了曲,并延迟了裂的开始,优于钉解决方案.
结论:
- 粘接复合材料补丁是一种有效,轻量级和可靠的方法来修复受损的飞机结构.
- 较大的复合材料补丁,特别是带有金属插件的复合材料补丁,在恢复结构功能方面最有效.
- 补丁几何形状和刚度是设计有效修复节点的关键因素,以提高疲劳寿命和安全性.
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