在不同温度和负荷率下,在CNT增强的CFRP中,I模式和II模式间层断裂性的表征
Burak Yenigun1, Muhammad Salman Chaudhry1, Elli Gkouti1
1Department of Mechanical Engineering, York University, Toronto, ON M3J 1P3, Canada.
Nanomaterials (Basel, Switzerland)
|June 10, 2023
概括
这项研究表明,将碳纳米管 (CNT) 添加到碳纤维增强聚合物 (CFRP) 中,可以提高骨折性,达到最佳的CNT数量. 断裂性随着加载速度和温度的增加而增加,但模式II性在室温时达到顶峰.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物复合材料 聚合物复合材料
- 纳米技术纳米技术
背景情况:
- 碳纤维增强聚合物 (CFRP) 是一种先进的材料,在各种工业中都有应用.
- 提高CFRP的层间断裂性对于提高结构完整性和耐久性至关重要.
- 碳纳米管 (CNTs) 在聚合物复合材料中提供了矩阵硬化潜力.
研究的目的:
- 为了研究温度和加载率对CNT-CFRP模式I和模式II间层断裂行为的影响.
- 确定最佳的碳纳米管 (CNT) 负载,以提高CFRP中的破裂性.
- 描述NNT在环氧基质中诱导的硬化机制.
主要方法:
- 在环氧基质中制造具有不同CNT面积密度的CFRP.
- 在不同的负载率和温度下对CNT-CFRP样品进行实验测试,以检测模式I和模式II断裂.
- 使用扫描电子显微镜 (SEM) 成像进行断裂表面分析.
主要成果:
- 间层骨折性 (模式I和模式II) 在CNT负荷高达1g/m2时增加,然后下降.
- 断裂性显示,在Mode I和Mode II中,负载率随着负载率的线性增加.
- 模式I断裂性随温度增加,而模式II性则增加到室温,然后降低.
结论:
- 优化CNT含量对于最大限度地提高CFRP的硬化效应至关重要.
- 负载率显著影响CNT-CFRP断裂性,并观察到正相关性.
- 温度对模式I和模式II断裂性有不同的影响,突出显示了对复合材料性能环境影响的复杂性.
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