对粘合粘合碳纤维增强塑料的真实粘合强度的评估
Maruri Takamura1, Minori Isozaki1, Shinichi Takeda2
1Department of Materials Science and Technology, Tokyo University of Science, Tokyo 125-8585, Japan.
Materials (Basel, Switzerland)
|January 23, 2024
概括
评估碳纤维增强热塑性塑料 (CFRTP) 的粘合强度至关重要. 这项研究表明,标准测试低估了真正的粘合强度,需要对航空航天应用进行仔细的解释.
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:
- 碳纤维增强热塑性塑料 (CFRTP) 具有高的特异性强度和刚性,这使得它们对航空航天应用具有吸引力.
- 粘合剂粘合是CFRTP的关键组装方法,但目前的强度评估方法不足.
- 像单圈切削试验这样的标准试验可能会导致由于组合应力状态而导致不准确的强度评估.
研究的目的:
- 通过比较表面强度和真实强度,全面评估CFRTP的结合强度.
- 调查现有实验方法在确定粘合剂接头真正的粘合强度方面的局限性.
- 分析粘合剂厚度对应力状态和粘合强度的影响.
主要方法:
- 使用三种不同的强度评估测试来比较表面和真实粘合强度.
- 数值分析以确定裂纹开始点的局部应力状态,以计算真实强度.
- 研究粘合剂的厚度对应力状态的依赖性.
主要成果:
- 单回合剪切试验低估了与真实粘接强度相比的表面粘接强度高达14%.
- 使用压缩开发的剪切测试显示,表面强度与真实强度之间的差异减少了.
- 与平面拉伸试验相比,压缩剪切试验也显示了较小的厚度依赖.
结论:
- 标准测试的实验结果应谨慎解释,当用于对粘附性质的数值分析.
- 开发的压缩剪切试验为评估CFRTP粘合剂粘合强度提供了更准确的方法.
- 了解和减轻粘合剂厚度的影响对于航空航天结构中可靠的关节设计至关重要.
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