关于单螺栓联合碳/环氧复合材料轴承强度和故障模式的研究
Sang Min Park1, Jin Hwan Jeon2, Won Jong Choi2
1Department of Smart Air Mobility, Korea Aerospace University, Goyang 10540, Republic of Korea.
Polymers
|March 28, 2024
概括
这项关于螺栓碳纤维增强塑料 (CFRP) 接头的研究揭示了最佳轴承强度的关键几何比率. 保持特定的宽度与直径和边与直径的比率可以防止城市空气流动组件的显著强度损失.
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:
- 城市空中交通 (UAM) 的增长需要强大的组装和可靠性研究.
- 碳纤维增强塑料 (CFRP) 的螺栓连接对于UAM结构至关重要.
- 了解机械特性,特别是轴承强度,对于UAM集成至关重要.
研究的目的:
- 评估螺栓式CFRP接头的机械特性,重点关注轴承强度.
- 调查宽度与直径 (w/D) 和边缘与直径 (e/D) 的比例对CFRP螺栓接头性能的影响.
- 确定关键的几何参数,以确保CFRP组件的结构完整性.
主要方法:
- 在不同的w/D和e/D比率下对CFRP螺栓接头进行实验性评估.
- 分析故障模式,特别是从张力过渡到轴承和剪切到轴承故障的过渡.
- 基于几何参数变化的轴承强度减少的量化.
主要成果:
- 在w/D=4.0时观察到从张力转变为轴承故障,导致显著的强度降低.
- 在e/D=2.0时从剪切到轴承故障的过渡导致了相当大的轴承强度损失.
- 记录了高达90.50% (w/D) 和94.90% (e/D) 的最大承载强度下降.
结论:
- 保持至少6.0的w/D比对于最佳性能至关重要.
- 至少3.0的e/D比对于结构稳定性至关重要.
- 这些几何准则对于在UAM应用中设计可靠的CFRP结构至关重要.
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