混合增强复合材料基板在各种负载率下的粘合结合中的性能
Hossein Malekinejad1, Ricardo J C Carbas1,2, Eduardo A S Marques2
1Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial (INEGI), Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Polymers
|February 26, 2025
概括
用或聚合物层强化碳纤维接头可显著提高抗冲击性和能量吸收性. 这种方法增强了关节的强度,对于航空航天应用来说至关重要,这些应用寻求提高性能和降低重量.
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:
- 粘合剂粘合是首选的合并复合材料,因为其性能优于传统方法.
- 分层是粘接复合材料接头的关键故障模式,导致过早故障.
- 提高复合材料基板的穿透强度是减轻分层风险的关键.
研究的目的:
- 调查基板增强技术,以防止碳纤维增强聚合物 (CFRP) 单层接头 (SLJs) 的分层.
- 为了评估合并和聚合物层对不同负载率下的关节故障负载和模式的影响.
- 使用凝聚性区域建模 (CZM) 数字预测故障机制.
主要方法:
- 研究使用和薄膜粘合层 (基板厚度的25%) 加强CFRP基板.
- 在准静态 (1毫米/分钟),高速率 (0.1米/秒) 和冲击 (2.5米/秒) 的负载条件下测试了粘接接头.
- 使用凝聚性区域建模 (CZM) 进行故障负载和机制的数值模拟.
主要成果:
- 在冲击负荷下,和聚合物强化显著增加了故障负载和能量吸收.
- 与参考CFRP相比,增强样品的故障负载比39%高,能量消耗比15%高.
- 聚合物增强提供增强的特定强度与最小的重量增加,适合航空航天.
结论:
- 用或聚合物外层增强CFRPSLJ有效防止分层并提高性能.
- 钢筋在故障负载和能量吸收方面提供了显著的改进,特别是在冲击下.
- 聚合物增强为改善航空航天复合材料接头的特定强度提供了一种轻量级的解决方案.
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