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Bond durability of fatigued CFRP-steel double-lap joints pre-exposed to marine environment

机译：预先暴露在海洋环境中的疲劳CFRP钢双搭接接头的粘结耐久性

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摘要

Carbon fibre reinforced polymers (CFRPs) provide new age possibilities in structural restoration. However, limited research is available on the combined effect of marine environment and fatigue loading on the bond behaviour between CFRP and steel. This paper outlines an experimental investigation into the durability of CFRP laminate and sheeting patched double-lap joints under elevated temperature marine submergence. CFRP-steel double-lap joints were submerged in a 5% by weight NaCl solution for different durations up to 6 months at 20, 40 and 50 degrees C, while under a static tensile load. After pre-immersion, specimens were fatigue loaded for a pre-set number of cycles, and then statically tensile loaded to failure, for determination of the effect that aggressive environmental exposure introduces to the integrity of CFRP-steel double-lap joints. The rate of strength degradation was most rapid for samples pre-immersed for 1 month. Overall more than half of the specimens witnessed at least a 10% reduction in strength; with sheeting and laminate specimens respectively suffering up to a 28% and 20% loss in strength. The results show that even in short term exposures, the protection and maintenance of such rehabilitated structures is paramount in ensuring their strength and resilience over time. (C) 2015 Elsevier Ltd. All rights reserved.
机译：碳纤维增强聚合物（CFRP）为结构修复提供了新的时代可能性。然而，关于海洋环境和疲劳载荷对CFRP和钢之间的粘结行为的综合影响的研究还很有限。本文概述了在高温海洋浸没条件下CFRP层压板和贴片双搭接接头的耐久性的实验研究。将CFRP钢双搭接接头在静态拉伸载荷下于20、40和50摄氏度下浸入5％重量的NaCl溶液中长达6个月的不同时间。预浸之后，将样品疲劳加载预设的循环次数，然后将其静态拉伸加载至破坏，以测定侵蚀性环境暴露对CFRP钢双搭接接头完整性的影响。对于预浸1个月的样品，强度下降的速度最快。总体上，超过一半的样本强度至少降低了10％。覆膜和层压板的强度分别降低28％和20％。结果表明，即使是短期暴露，这种修复结构的保护和维护对于确保其强度和弹性也至关重要。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Composite Structures》 |2015年第11期|799-809|共11页
  • 作者

    Borrie D.; Liu H. B.; Zhao X. L.; Raman R. K. Singh; Bai Y.;

  • 作者单位

    Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia;

    Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia;

    Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia;

    Monash Univ, Dept Mech & Aerosp Engn, Clayton, Vic 3800, Australia|Monash Univ, Dept Chem Engn, Clayton, Vic 3800, Australia;

    Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia;

  • 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

    CFRP; Steel; Environmental exposure; Fatigue; Bond strength; Rehabilitation;

    机译：CFRP;钢;环境暴露;疲劳;结合强度;修复;

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