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Numerical analysis of central mixed-mode cracking in steel plates repaired with CFRP materials
Abstract Finite element method (FEM) was adopted to study the fatigue properties of steel plates with central mixed-mode (I/II) crack repaired with carbon fiber-reinforced polymer (CFRP) sheets. To simulate crack propagation in repaired and un-repaired specimens, a script was written in Python for automatic modelling. The numerical results were compared with the experimental results, and they fitted well in terms of crack growth trajectories and fatigue propagation lives. Thereafter, different parameters such as the number of CFRP layers, CFRP width, CFRP modulus, and load application angle were considered to investigate CFRP repairing efficiency. Results demonstrated that FEM effectively simulated the fatigue performance of steel plates with mixed-mode crack. CFRP sheets can reduce the effective stress intensity factor (SIF) range to prolong the fatigue life of the cracked steel plate. The aforementioned parameters significantly affected the fatigue performance.
Highlights CFRP repair can effectively enhance the fatigue life of center-cracked steel plates. A Python-based FE method is developed for the automated fatigue crack modelling. The simulated failure modes, crack trajectories and fatigue life are validated experimentally. Repair effects increase with the increment of CFRP layer number, width and Young's modulus. Repair effects decrease with the augment of load application angle.
Numerical analysis of central mixed-mode cracking in steel plates repaired with CFRP materials
Abstract Finite element method (FEM) was adopted to study the fatigue properties of steel plates with central mixed-mode (I/II) crack repaired with carbon fiber-reinforced polymer (CFRP) sheets. To simulate crack propagation in repaired and un-repaired specimens, a script was written in Python for automatic modelling. The numerical results were compared with the experimental results, and they fitted well in terms of crack growth trajectories and fatigue propagation lives. Thereafter, different parameters such as the number of CFRP layers, CFRP width, CFRP modulus, and load application angle were considered to investigate CFRP repairing efficiency. Results demonstrated that FEM effectively simulated the fatigue performance of steel plates with mixed-mode crack. CFRP sheets can reduce the effective stress intensity factor (SIF) range to prolong the fatigue life of the cracked steel plate. The aforementioned parameters significantly affected the fatigue performance.
Highlights CFRP repair can effectively enhance the fatigue life of center-cracked steel plates. A Python-based FE method is developed for the automated fatigue crack modelling. The simulated failure modes, crack trajectories and fatigue life are validated experimentally. Repair effects increase with the increment of CFRP layer number, width and Young's modulus. Repair effects decrease with the augment of load application angle.
Numerical analysis of central mixed-mode cracking in steel plates repaired with CFRP materials
Chen, Tao (Autor:in) / Yao, Cheng (Autor:in) / Hu, Liang (Autor:in) / Huang, Cheng (Autor:in) / Li, Xiang (Autor:in)
Thin-Walled Structures ; 143
14.05.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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