复合材料科学与工程 ›› 2025, Vol. 0 ›› Issue (4): 74-81.DOI: 10.19936/j.cnki.2096-8000.20250428.009

• 设计与工艺 • 上一篇    下一篇

纳米ZnO树脂薄膜提升CFRP层合板层间断裂性能研究

杜徐玮1,2, 牛雪娟1,2*   

  1. 1.天津工业大学 机械工程学院,天津 300387;
    2.天津市现代机电装备技术重点实验室,天津 300387
  • 收稿日期:2024-02-06 出版日期:2025-04-28 发布日期:2025-06-03
  • 通讯作者: 牛雪娟(1977—),女,博士研究生,教授,主要从事复合材料成型技术方面的研究,niuxuejuan@tiangong.edu.cn。
  • 作者简介:杜徐玮(1998—),男,硕士研究生,主要从事碳纤维复合材料薄膜增韧方面的研究。
  • 基金资助:
    仿生多相共固微构型CFRP的可控合成及热压固化特性研究(23JCZDJC00450)

Research on improving the interlayer fracture performance of CFRP laminates with nano ZnO resin films

DU Xuwei1,2, NIU Xuejuan1,2*   

  1. 1. School of Mechanical Engineering, Tiangong University, Tianjin 300387, China;
    2. Advanced Mechatronics Equipment Technology Tianjin Area Major Laboratory, Tianjin 300387, China
  • Received:2024-02-06 Online:2025-04-28 Published:2025-06-03

摘要: 碳纤维/聚合物基复合材料(CFRP)层合板法向刚度远低于面内刚度,当受到面外载荷作用时,极易发生损伤失稳。为了对厚度方向进行增韧,研究了改性纳米ZnO增韧薄膜对CFRP层合板力学性能的影响。首先使用偶联剂对纳米ZnO进行改性,得到改性后的纳米ZnO,将不同质量分数(0~4wt%)的改性纳米ZnO颗粒在固化剂的作用下混合加入环氧树脂中,在复合材料试件的两个界面之间形成了具有不同层间性能的黏结膜,并将其应用于端部缺口弯曲(ENF)试验和双悬臂梁(DCB)试验。建立了一系列有限元模型,并结合试验数据确定的模型参数对改性纳米ZnO和固化剂的影响进行了分析。结果表明,对于增韧梁(含4wt%改性纳米ZnO和2wt%GEL2-BS),ENF试验和DCB试验的临界载荷分别增加了30.25%和68.40%。

关键词: 黏结膜, 改性纳米ZnO颗粒, 界面增韧, 端部缺口弯曲试验, 双悬臂梁试验

Abstract: Carbon fiber reinforced plastics (CFRP) laminates are prone to damage and instability when subjected to out of plane loads due to their significantly lower normal stiffness compared to in-plane stiffness. In order to toughen the thickness direction, the effect of modified nano ZnO toughened films on the mechanical properties of CFRP laminates was studied. Nano-ZnO is first modified by coupling agent to obtain modified nano-ZnO, which was added into epoxy resin as nano-filler. By blending modified nano-ZnO particles at different mass ratios from 0 to 4wt% in the presence of a curing agent, some cohesive films with different interlaminar properties were formed between the two interfacial surfaces in a composite specimen, which have been applied in end-notched flexure (ENF) tests and double cantilever beam (DCB) tests. A series of finite element (FE) models, together with the predetermined model parameters, were built to assess the influence of modified nano-ZnO and curing agent. The results show that, for the toughened beam (with 4wt% modified nano-ZnO and 2wt% GEL2-BS), the critical loads of ENF tests and DCB tests increases by 30.25% and 68.40%, respectively.

Key words: cohesive film, modified nano-ZnO particles, interface toughening, end-notched flexure (ENF) tests, double cantilever beam (DCB) tests

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