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具有双孔缺陷的NCF层材的压缩故障机制
Songming Cai1, Shi Yan1, Lili Jiang2
1Architectural Engineering Institute, Harbin University of Science and Technology, Harbin 150080, China.
Materials (Basel, Switzerland)
|February 13, 2026
概括
非纹面料 (NCF) 层材中的开孔压缩 (OHC) 强度受到孔的方向和间距的显著影响. 存在一个关键距离,超越这个距离,强度的增长会减少,而度仍然不受影响.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 非纹织物 (NCF) 复合材料是用于各种结构应用的先进材料.
- 了解压缩下有孔的复合材料的机械行为对于设计至关重要.
- 之前的研究已经探讨了复合故障的各个方面,但在NCF中对OHC的详细建模需要进一步调查.
研究的目的:
- 为了研究孔方向和间距对NCF层材的开孔压缩 (OHC) 强度的影响.
- 开发和验证一个渐进性损伤模型,以捕捉内部层和内部层失效机制.
- 为了确定几何参数与NCF层材的压力强度和刚度之间的相关性.
主要方法:
- 在压缩下对NCF层材进行实验测试,采用各种孔配置.
- 扫描电子显微镜 (SEM) 用于故障模式分析.
- 使用Abaqus进行有限元分析 (FEA),并采用渐进性损伤模型,结合Hashin的标准和分层的凝聚性元素.
主要成果:
- OHC强度受到孔方向和间距的显著影响,观察到一个显著的间距值.
- 显而易见的弹性刚性在很大程度上对孔间距和方向的变化不敏感.
- 开发的FEA模型准确地预测了线性弹性行为,随后是灾难性失败,与实验数据相匹配.
结论:
- 孔几何在NCF层材的压力故障行为中起着至关重要的作用.
- 综合内膜和内膜失效的综合损伤模型对于预测OHC反应是有效的.
- 这些发现为设计和分析带有切片的复合结构提供了宝贵的见解.
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