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Enhanced comprehensive performance of bonding interface between CFRP and steel by a novel film adhesive

机译：新型薄膜胶增强了CFRP与钢之间的粘合界面的综合性能

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摘要

A novel film adhesive was proposed to bond carbon fiber reinforced polymer (CFRP) laminas to steel substrates, and experimental validations for improved comprehensive bond performances are presented. This film adhesive was shown to possess excellent high-temperature resistance via dynamic mechanical analysis (DMA). A series of CFRP/steel double-lap joints (DLJs) with different bond lengths were experimentally studied, focusing on the failure modes, effective bond length, bond-slip relationship, and bond strength. The results show that the film-adhesive bonded joints fail in the mode of CFRP delamination, which indicates a stronger interfacial bond between the adhesive layer and adherends than the intra-laminar strength of CFRPs. The bonding interface has an effective bond length of approximately 65 mm, beyond which no increase of ultimate load can be achieved with the increase of bond length. The bond-slip relationship of the film-adhesive bonding interface exhibits a trapezoidal (ductile) shape, which is significantly different from the triangular (brittle) shapes for most paste-adhesive interfaces. Superior strength, ductility, and high-temperature resistance of the bonding interfaces in CFRP/steel composites are achieved due to the use of this film adhesive. The proposed study offers an alternative solution to an enhanced comprehensive property of the bonding interface in CFRP/steel composites.
机译：提出了一种新型的薄膜胶粘剂，用于将碳纤维增强聚合物（CFRP）薄板粘结到钢基材上，并提出了用于改善综合粘结性能的实验验证。通过动态力学分析（DMA），显示该膜粘合剂具有优异的耐高温性。对一系列不同粘结长度的CFRP /钢制双搭接接头（DLJ）进行了实验研究，重点研究了破坏模式，有效粘结长度，粘结滑移关系和粘结强度。结果表明，薄膜-胶粘剂粘结接头在CFRP分层模式下失效，这表明胶粘剂层与被粘物之间的界面粘结比CFRP的层内强度强。粘结界面的有效粘结长度约为65 mm，超过该长度，粘结长度将无法增加最终载荷。膜-粘合剂粘合界面的粘合-滑移关系呈现梯形（延性）形状，与大多数糊状粘合剂界面的三角形（脆性）形状明显不同。由于使用了这种薄膜胶粘剂，因此在CFRP /钢复合材料中实现了粘合界面的优异强度，延展性和耐高温性。拟议的研究为CFRP /钢复合材料中粘结界面的综合性能增强提供了一种替代解决方案。

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  • 来源
    《Composite Structures》 |2019年第12期|111393.1-111393.14|共14页
  • 作者

    Ke Lu; Li Chuanxi; Luo Nanhai; He Jun; Jiao Yang; Liu Yongming;

  • 作者单位

    Changsha Univ Sci & Technol Dept Educ Key Lab Bridge Engn Safety Control Changsha 410114 Hunan Peoples R China|Changsha Univ Sci & Technol Sch Civil Engn Changsha 410114 Hunan Peoples R China|Arizona State Univ Mat Sci & Engn Tempe AZ 85287 USA;

    Changsha Univ Sci & Technol Dept Educ Key Lab Bridge Engn Safety Control Changsha 410114 Hunan Peoples R China|Changsha Univ Sci & Technol Sch Civil Engn Changsha 410114 Hunan Peoples R China;

    Changsha Univ Sci & Technol Sch Civil Engn Changsha 410114 Hunan Peoples R China;

    Changsha Univ Sci & Technol Sch Civil Engn Changsha 410114 Hunan Peoples R China|Heriot Watt Univ Inst Infrastruct & Environm Edinburgh EH14 4AS Currie Scotland;

    Arizona State Univ Mat Sci & Engn Tempe AZ 85287 USA;

    Arizona State Univ Aerosp & Mech Engn Tempe AZ 85287 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bond performance; Carbon fiber reinforced polymer (CFRP); Steel; Film adhesive; Bond-slip relationship;

    机译：债券表现;碳纤维增强聚合物（CFRP）;钢;薄膜胶粘剂;粘滑关系;

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