Durability of bonded FRP-to-steel joints: Effects of moisture, de-icing salt solution, temperature and FRP type

被引：143
作者：
Heshmati, Mohsen [1 ]
Haghani, Reza [1 ]
Ai-Emrani, Mohammad [1 ]
机构：
[1] Chalmers Univ Technol, Div Struct Engn, Dept Civil & Environm Engn, Gothenburg, Sweden
来源：
COMPOSITES PART B-ENGINEERING | 2017年 / 119卷
关键词：
Polymer-matrix composites (PMCs); Environmental degradation; Mechanical properties; FRP-steel bonded joints; DOUBLE-LAP JOINTS; ENVIRONMENTAL DURABILITY; ADHESIVE JOINTS; CFRP JOINTS; COMPOSITES; BEHAVIOR; CARBON; PREDICTION; STRENGTH; EXPOSURE;
D O I：
10.1016/j.compositesb.2017.03.049
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper investigates the effects of environmental ageing on the mechanical response of adhesively bonded double-lap shear joints made of steel and CFRP or GFRP adherents. One hundred and ninety-two specimens, 84 joints and 108 material coupons, were aged for up to three years in various environments including (i) immersion in distilled water at 20 degrees C and 45 degrees C, (ii) immersion in de-icing salt solution at 20 degrees C and 45 degrees C and (iii) exposure to 95% relative humidity at 45 degrees C. In general, immersion at 45 degrees C resulted in noticeably greater strength reductions at both material and joint level. While the strength and stiffness of the joints made of GFRP material underwent significant reductions, the CFRP/steel joints were affected to a considerably smaller degree. FE simulations showed the impact of the permeability of FRP adherents and moisture distribution at the FRP/adhesive interface on the integrity and strength of the joints. The joint-level results are compared with the most relevant durability data in the literature. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：153 / 167
页数：15
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