具有预制孔的3D四向编织复合材料的压缩故障特性
Xin Wang1, Hanhua Li2, Yuxuan Zhang1
1Department of Engineering Mechanics, Harbin University of Science and Technology, Harbin 150080, China.
Materials (Basel, Switzerland)
|August 10, 2024
概括
三维四向 (3D4d) 编织复合材料具有很高的损坏耐受性. 这项研究研究了它们的压缩性质和有孔的故障机制,发现更大的编织角度提高了损伤耐受性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 三维 (3D) 编织复合材料提供低分层和高耐损性,使它们适合易受缺陷的应用.
- 评估缺陷的影响,特别是洞,对于优化这些先进材料的工程潜力至关重要.
研究的目的:
- 研究具有预制孔的三维四向 (3D4d) 编织复合材料的压缩性能和故障机制.
- 评估编织角度和孔类型对3D4d编织复合材料的损伤耐受性和机械性能的影响.
主要方法:
- 用实验测试和有限元分析来研究复合材料.
- 数字图像相关性 (DIC) 监测了表面应变,扫描声学显微镜 (SAM) 和扫描电子显微镜 (SEM) 标志着内部故障模式.
- 使用通用编织复合材料预测理论开发了一种宏观模型.
主要成果:
- 该研究建立了可降低成本和可控误差 (在21%以内) 的多孔编织复合材料的预测模型.
- 故障分析揭示了损伤扩展模式,并证实孔隙损伤耐受性与编织材料的轴承结构相关.
- 带有较大的编织角度的标本表现出较高的孔隙损伤耐受性,强度损失从38.21% (15°) 降至8.1% (30°).
结论:
- 编织角度显著影响轴承模式,并提高3D4D编织复合材料的多孔损伤耐受性.
- 这些发现为包含缺陷的复合材料的故障机制和损伤耐受性提供了洞察力,指导材料设计.
- 不同的预制孔类型也会影响复合材料的机械性能和整体耐损性.
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