对CFRP/Al钉损坏建模应用的离散裂纹和涂抹裂纹方法的比较
Minghao Zhang1, Kun Tian2, Zengqiang Cao1
1School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
Materials (Basel, Switzerland)
|October 16, 2025
概括
这项研究使用了离散裂纹建模 (DCM) 方法来分析碳纤维增强聚合物/接头的电磁钉 (EMR). 结果表明,增加孔清除率可以减少初始损伤,DCM准确地建模裂的开始和传播.
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:
- 碳纤维增强聚合物/ (CFRP/Al) 接头对于轻型飞机至关重要.
- 预测和优化钉工艺需要先进的数值模拟.
- 电磁钉 (EMR) 是这些复合结构的关键连接技术.
研究的目的:
- 调查EMR期间CFRP/Al关节的初始钉损伤和干扰.
- 为了比较离散裂纹建模 (DCM) 方法与涂抹裂纹方法 (SCM).
- 分析孔清除对损害演变的影响.
主要方法:
- 采用基于浮动节点方法 (FNM) 的离散裂纹建模 (DCM) 方法.
- 模拟了CFRP/Al接头的电磁钉 (EMR) 过程.
- 调查了五个不同孔通道的案例.
- 将FNM结果与常规涂抹裂方法 (SCM) 进行比较.
主要成果:
- 发现沿关节轴向的干扰分布不均.
- 增加钉孔的空隙有效地减轻了最初的钉损坏.
- FNM准确地捕获了矩阵裂和分层的启动和传播.
- 虽然DCM方法是准确的,但它产生了计算成本.
结论:
- FNM提供了一种可行且准确的方法来模拟CFRP/Al接头的钉损伤.
- 孔清除是EMR期间管理损坏的关键参数.
- 数字模拟是优化轻型飞机结构连接的重要工具.
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