关于CF/PA6带有预嵌入间层缺陷的板材中低速冲击的损害调节机制的研究
Fuwei Gu1, Zhiyi Tian1, Zhiyang Chen1
1School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China.
Polymers
|February 27, 2026
概括
将缺陷引入热塑性复合材料可以提高其损伤耐受性. 这项研究使用聚四乙烯 (PTFE) 薄膜来提高碳纤维增强聚合物 (CFRP) 的抗冲击性和可修复性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 复合材料 复合材料 复合材料
背景情况:
- 热塑性碳纤维增强聚合物 (CFRPs) 通过热再化为分层和矩阵裂提供自我修复特性.
- 然而,CFRP在冲击负荷下表现出显著的纤维断裂,限制了它们的修复能力.
- 开发策略以减轻冲击损伤并增强CFRP中的伪柔性对于结构应用至关重要.
研究的目的:
- 调查预设间层缺陷对连续碳纤维增强聚胺6 (CF/PA6) 热塑性交叉层层材质冲击反应和损伤机制的影响.
- 评估聚四乙烯 (PTFE) 薄膜作为间层缺陷的潜力,以提高抗冲击性和伪柔性.
- 为热塑性复合材料的伪柔性设计提供实验基础.
主要方法:
- 低速撞击测试在各种能量级别的 CF/PA6 层材上进行了嵌入 PTFE 薄膜和不嵌入 PTFE 薄膜的测试.
- 在含有缺陷和基线标本之间对冲击反应,损伤机制和硬度的比较分析.
- 微结构检查,以了解能量消耗机制和故障模式.
主要成果:
- 嵌入式层间缺陷诱导了CFRP从脆性骨折到渐进性损伤行为的过渡.
- 与基线层材相比,有缺陷的样本在低能冲击下表现出更高的屈曲刚度.
- 由于通过分层,摩擦滑动和塑料微变形的能量消耗,观察到纤维破裂的减少.
结论:
- 预设的间层缺陷,如PTFE薄膜,可以有效地定制热塑性复合材料的微观结构,以实现宏观的伪柔性.
- 这种方法通过促进渐进性损伤和减少纤维断裂来提高抗冲击性和可修复性.
- 这些发现支持开发更坚固,更耐损坏的热塑性复合结构.
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