基于有限元分析的混合螺栓/结合复合材料接头的强度优化
Raphael Blier1, Leila Monajati2, Masoud Mehrabian2
1Department of Mechanical Engineering, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada.
Materials (Basel, Switzerland)
|July 13, 2024
概括
混合螺栓/接 (HBB) 复合接头的应力度低于单独螺栓接头. 优化HBB关节性能涉及诸如粘合性质和层层厚度等因素,以改善负载共享.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 复合材料 复合材料 复合材料
背景情况:
- 复合材料越来越多地用于结构应用.
- 连接复合结构带来了独特的挑战,因为材料的异构性和损伤敏感性.
- 混合连接技术,结合机械和粘合剂粘合,提供潜在的优势.
研究的目的:
- 为了研究在拉力剪切负荷下单准同位素 (QI) 和交叉层 (CP) 混合螺栓/接 (HBB) 复合接头的行为.
- 确定影响复合联接强度,故障模式和负载共享机制的关键设计因素.
- 为了优化HBB复合材料接头的性能.
主要方法:
- 使用有限元分析 (FEA) 来模拟HBB关节的机械反应.
- 分析的重点是围绕孔和粘合层的应力度.
- 进行了参数研究,以评估各种设计因素对关节性能的影响.
主要成果:
- 与专用螺栓接头相比,HBB接头的应力度明显较低,特别是在CP配置中.
- 证实了三螺栓HBB接头中中间螺栓的冗余性.
- 粘合剂的刚性和可塑性极大地影响了从螺栓到结合的关节行为过渡.
- 负载共享潜力通过减少重叠,低刚度/高可塑性粘合剂和QI叠加中的更厚层材来增强.
- 增加边缘距离到孔径比和冲洗器大小可以减少粘合应力并提高关节强度.
结论:
- 与只有螺栓的配置相比,HBB接头提供更好的应力分布和强度.
- 粘合性能和层状设计对于定制HBB关节性能至关重要.
- 设计参数,如重叠长度,边缘距离和洗衣机大小可以优化,以提高负载共享和关节耐用性.
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