TY - GEN
T1 - Temperature effect on the dynamic bond behavior of CFRP/steel single-lap shear joints
AU - Yao, Mingxia
AU - Zhu, Deju
AU - Yao, Yiming
AU - Zhang, Huaian
AU - Mobasher, Barzin
N1 - Funding Information:
This work was supported by the funds from National Basic Research Program of China (973 program, Grant No. 2012CB026200), the Sci-Tech Support Plan of Hunan Province (Grant No. 2014WK2026), and the Interdisciplinary Research Project of Hunan University.
Publisher Copyright:
Copyright © 2016 Department of Civil and Environmental Engineering & Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University.
PY - 2016
Y1 - 2016
N2 - In this work, CFRP plates were made using vacuum assisted resin transfer molding (VARTM) technique. CFRP/Steel single-lap shear joints were manufactured by bonding steel and CFRP together with epoxy resin. Specimens were tested under dynamic tensile loading (0.625 m/s) on a servo-hydraulic high rate testing system under four temperatures (-25, 0, 50, 100 C). The experimental results showed that the mechanical properties of joints were sensitive to temperature. In a certain range, both the bond strength and interfacial fracture energy of specimens increased from -25 to 50 C. When the temperature exceeded the glass transition temperature of the adhesive, bond strength and interfacial fracture energy decreased significantly. The failure modes of specimens were different at varying temperatures. At the low temperature (-25 C and 0 C), the failure mode of joints were adhesive/steel interface debonding failure. At the temperature of 50 C, the failure mode turned to the mixed failure. When the temperature reached 100 C, the failure mode changed to adhesive/CFRP interface debonding failure. Moreover, the strain field distribution of FRP in overlapping area at different temperatures was analyzed using a digital image correlation (DIC) method. The results showed that the strains of FRP at the edge of overlapping area were larger than those in the center, and final failure was initiated at the edge of the specimen.
AB - In this work, CFRP plates were made using vacuum assisted resin transfer molding (VARTM) technique. CFRP/Steel single-lap shear joints were manufactured by bonding steel and CFRP together with epoxy resin. Specimens were tested under dynamic tensile loading (0.625 m/s) on a servo-hydraulic high rate testing system under four temperatures (-25, 0, 50, 100 C). The experimental results showed that the mechanical properties of joints were sensitive to temperature. In a certain range, both the bond strength and interfacial fracture energy of specimens increased from -25 to 50 C. When the temperature exceeded the glass transition temperature of the adhesive, bond strength and interfacial fracture energy decreased significantly. The failure modes of specimens were different at varying temperatures. At the low temperature (-25 C and 0 C), the failure mode of joints were adhesive/steel interface debonding failure. At the temperature of 50 C, the failure mode turned to the mixed failure. When the temperature reached 100 C, the failure mode changed to adhesive/CFRP interface debonding failure. Moreover, the strain field distribution of FRP in overlapping area at different temperatures was analyzed using a digital image correlation (DIC) method. The results showed that the strains of FRP at the edge of overlapping area were larger than those in the center, and final failure was initiated at the edge of the specimen.
KW - Bond strength
KW - Failure mode
KW - Single lap shear joints
KW - Temperature effect
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M3 - Conference contribution
AN - SCOPUS:85049872288
T3 - Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
SP - 1388
EP - 1394
BT - Proceedings of the 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
A2 - Dai, J.G.
A2 - Teng, J.G.
PB - Department of Civil and Environmental Engineering and Research Institute for Sustainable Urban Development, The Hong Kong Polytechnic University
T2 - 8th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2016
Y2 - 14 December 2016 through 16 December 2016
ER -