Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental study on the bond behavior of CFRP-steel interfaces under quasi-static cyclic loading
Abstract Copious studies have focused on the bond behavior under monotonic loading. However, relative research under quasi-static cyclic loading is still limited. In order to improve the understanding of the bond behavior of CFRP-steel interfaces under quasi-static cyclic loading, an experimental study was conducted in this paper. A series of the CFRP-steel single-shear specimens were manufactured to investigate the effects of bond length, adhesive thickness, adhesive type and loading procedures on the bond behavior of CFRP-steel interfaces. Strains and displacements on the specimen surface were measured by three-dimensional digital image correlation (3D-DIC) technology. The interfacial damage and the threshold load were analysed. The experimental results showed that the loading procedures had no effect on the ultimate loads of specimens with Sikadur-30 (CN), while the ultimate loads of specimens with. Araldite-2015 (CN) under quasi-static cyclic loading were less than those under monotonic loading. The bond-slip relationships under monotonic loading showed bilinear and trilinear shapes for the specimens with adhesives Sikadur-30 (CN) and Araldite-2015 (CN), respectively. The envelope lines of the load-slip and the bond-slip relationship tested under quasi-static cyclic loading could be traced by those under monotonic loading. Relationships between the damage parameter D and the normalized energy dissipation w d/G f and the normalized slip S i/S f were established by fitting experimental data. Based on the test results, the threshold loads could be detected for each specimen under the monotonic loading procedure, which was approximately 52.5% and 39.5% of the ultimate load for the specimens with adhesive Sikadur-30 (CN) and Araldite-2015 (CN), respectively.
Highlights A set of loading device was designed to test CFRP-steel single-shear specimen. Interface damage analysis of CFRP-steel specimen under cyclic loading was conducted based on interface stiffness variation and energy dissipation. The threshold load of the CFRP-steel interface was obtained through experimental data.
Experimental study on the bond behavior of CFRP-steel interfaces under quasi-static cyclic loading
Abstract Copious studies have focused on the bond behavior under monotonic loading. However, relative research under quasi-static cyclic loading is still limited. In order to improve the understanding of the bond behavior of CFRP-steel interfaces under quasi-static cyclic loading, an experimental study was conducted in this paper. A series of the CFRP-steel single-shear specimens were manufactured to investigate the effects of bond length, adhesive thickness, adhesive type and loading procedures on the bond behavior of CFRP-steel interfaces. Strains and displacements on the specimen surface were measured by three-dimensional digital image correlation (3D-DIC) technology. The interfacial damage and the threshold load were analysed. The experimental results showed that the loading procedures had no effect on the ultimate loads of specimens with Sikadur-30 (CN), while the ultimate loads of specimens with. Araldite-2015 (CN) under quasi-static cyclic loading were less than those under monotonic loading. The bond-slip relationships under monotonic loading showed bilinear and trilinear shapes for the specimens with adhesives Sikadur-30 (CN) and Araldite-2015 (CN), respectively. The envelope lines of the load-slip and the bond-slip relationship tested under quasi-static cyclic loading could be traced by those under monotonic loading. Relationships between the damage parameter D and the normalized energy dissipation w d/G f and the normalized slip S i/S f were established by fitting experimental data. Based on the test results, the threshold loads could be detected for each specimen under the monotonic loading procedure, which was approximately 52.5% and 39.5% of the ultimate load for the specimens with adhesive Sikadur-30 (CN) and Araldite-2015 (CN), respectively.
Highlights A set of loading device was designed to test CFRP-steel single-shear specimen. Interface damage analysis of CFRP-steel specimen under cyclic loading was conducted based on interface stiffness variation and energy dissipation. The threshold load of the CFRP-steel interface was obtained through experimental data.
Experimental study on the bond behavior of CFRP-steel interfaces under quasi-static cyclic loading
Pang, Yuyang (Autor:in) / Wu, Gang (Autor:in) / Wang, Haitao (Autor:in) / Su, Zhilong (Autor:in) / He, Xiaoyuan (Autor:in)
Thin-Walled Structures ; 140 ; 426-437
31.03.2019
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2015
| British Library Online Contents | 2015