Research Article
Assessment of Existing Bond-Slip Models of Adhesively Bonded CFRP-Steel Joints
@INPROCEEDINGS{10.4108/eai.7-9-2021.2315490, author={Mohammed J. Altaee and Majid M.A. Kadhim and Sarmed A.S. Altayee and Akram Jawdhari}, title={Assessment of Existing Bond-Slip Models of Adhesively Bonded CFRP-Steel Joints}, proceedings={Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey}, publisher={EAI}, proceedings_a={IMDC-IST}, year={2022}, month={1}, keywords={frp-steel joint finite element bond-slip model abaqus double strap joint}, doi={10.4108/eai.7-9-2021.2315490} }- Mohammed J. Altaee
Majid M.A. Kadhim
Sarmed A.S. Altayee
Akram Jawdhari
Year: 2022
Assessment of Existing Bond-Slip Models of Adhesively Bonded CFRP-Steel Joints
IMDC-IST
EAI
DOI: 10.4108/eai.7-9-2021.2315490
Abstract
Strengthening of steel structures with fibre-reinforced polymer (FRP) composites has attracted great attention due to their desirable mechanical properties, non-corrosive nature, and ease of application. The bond between an FRP laminate and steel substrate plays a significant role in ensuring the effectiveness of the strengthening system. Various bond-slip (τ-δ) relations for FRP-steel joints have been developed, mainly from experimental tests on single or double-lap shear specimens. However, existing models employ different stress-slip relations and mathematical expressions, suggesting that their predictions of failure load, mode and other interface properties, might be inconsistent. In this study, a comprehensive finite element (FE) model, comprising all parts of the FRP-steel joint in a double-lap configuration, has been developed to evaluate several commonly used (τ- δ) models. The FE model is able to capture all probable failure modes including interfacial failure (debonding), FRP rupture and steel yielding. In addition, a new trapezoidal τ- δ law has been coded into the FE software by the authors and compared with other existing models. The FE model was then used to simulate a large number of double-lap tests from literature containing different material and geometric properties and varying by the (τ- δ) relation from examined theoretical models.
