Effect of functionalized nano-SiO2 addition on bond behavior of adhesively bonded CFRP-steel double-lap joint

被引：45
作者：
Li, You [1 ,2 ]
Li, Chuanxi [1 ,2 ]
He, Jun [2 ,3 ]
Gao, Youwei [2 ]
Hu, Zheng [2 ]
机构：
[1] Changsha Univ Sci & Technol, Key Lab Safety Control Bridge Engn, Minist Educ, Changsha 410114, Peoples R China
[2] Changsha Univ Sci & Technol, Sch Civil Engn, Changsha 410114, Peoples R China
[3] Heriot Watt Univ, Inst Infrastruct & Environm, Edinburgh EH14 4AS, Currie, Scotland
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 244卷
基金：
中国国家自然科学基金;
关键词：
Functionalized nano-SiO2; Epoxy resin adhesive; CFRP-steel joint; Failure mode; Bonding behavior; MECHANICAL-PROPERTIES; EPOXY; STRENGTH; FATIGUE;
D O I：
10.1016/j.conbuildmat.2020.118400
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The mechanical properties of adhesives significantly influence the bond behavior of steel structures strengthened by carbon fiber-reinforced polymer (CFRP) composites. In order to improve the toughness of the adhesive and the ductile behavior of adhesively bonded CRFP-steel joint, functionalized nano-sized silica (hereafter refer as nano-SiO2) toughening agent were added into the adhesive. Firstly, the effects of functionalized nano-SiO2 toughening agent on the mechanical properties of the adhesives after curing at room temperature were tested and analyzed. Then, a total of 19 adhesively bonded CFRP-steel double-lap joints were fabricated and tested under shear loading to investigate the effect of functionalized nano-SiO2 on the bonding behaviors, including the failure modes, bond-slip relationships, bond strength and so on. The test results indicate that tensile stress-strain relationship of the adhesive changes from linear to non-linear with the increase of functionalized nano-SiO2 toughening agent, the elongation at break, strain energy and shear strength of functionalized nano-SiO2-toughened adhesive (ZR14-weight ratio of 1% functionalized nano-SiO2) was improved by 202.88%, 292.10% and 133.12% respectively in comparison to the adhesive without functionalized nano- SiO2 toughening agent. Moreover, the tensile strength, elongation at break, and strain energy of functionalized nano-SiO2-toughened adhesive ZR14 are much higher than those of commercial adhesives (e.g. Sika30, 330) without Nano-SiO2. In addition, the failure mode of CFRP-steel joints changed from interface failure to CFRP plate delamination, when the weight ratio of functionalized nano-SiO2 to adhesive increasing from 0 to 1%. The bond-slip curves could be simplified into a bilinear model (triangle-shape) for CFRP-steel joints without and with only weight ratio of 0.5% functionalized nano-SiO2, however, the bond-slip curves change to simplified trilinear model (trapezoidal shape) for the joints with 1% functionalized nano-SiO2 and the toughness of bonding interface is significantly improved. In all, the CFRP-steel lap joints bonded by adhesive with appropriate amount functionalized nano-SiO2 (i.e., wt. of 1%) shows superior interfacial performance. (C) 2020 Elsevier Ltd. All rights reserved.d
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页数：17
相关论文
共 43 条
[1]   Research on strength of nanocomposite adhesively bonded composite joints [J].
Akpinar, Iclal Avinc ;
Gultekin, Kursat ;
Akpinar, Salih ;
Akbulut, Hamit ;
Ozel, Adnan .
COMPOSITES PART B-ENGINEERING, 2017, 126 :143-152
[2]   Performance of CFRP-steel joints enhanced with bi-directional CFRP fabric [J].
Al-Mosawe, Alaa ;
Al-Mahaidi, Riadh .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 197 :72-82
[3]   Effect of CFRP properties, on the bond characteristics between steel and CFRP laminate under quasi-static loading [J].
Al-Mosawe, Alaa ;
Al-Mahaidi, Riadh ;
Zhao, Xiao-Ling .
CONSTRUCTION AND BUILDING MATERIALS, 2015, 98 :489-501
[4]  
American Society for testing and Materials (ASTM), 2013, STAND TEST METH ASS
[5]  
[Anonymous], 2011, PLASTICS DETERMINA 1
[6]   Design and testing of an adhesively bonded CFRP strengthening system for steel structures [J].
Chataigner, S. ;
Benzarti, K. ;
Foret, G. ;
Caron, J. F. ;
Gemignani, G. ;
Brugiolo, M. ;
Calderon, I. ;
Pinero, I. ;
Birtel, V. ;
Lehmann, F. .
ENGINEERING STRUCTURES, 2018, 177 :556-565
[7]  
Chuan-xi L.I, 2017, CHINA J HIGHW TRANSP, V30, P121
[8]   Tensile creep of a structural epoxy adhesive: Experimental and analytical characterization [J].
Costa, Ines ;
Banos, Joaquim .
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, 2015, 59 :115-124
[9]   A new bond-slip model for adhesive in CFRP-steel composite systems [J].
Dehghani, E. ;
Daneshjoo, F. ;
Aghakouchak, A. A. ;
Khaji, N. .
ENGINEERING STRUCTURES, 2012, 34 :447-454
[10]  
Fernando ND, 2010, PhD thesis
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