Experimental study on mixed-mode fatigue behavior of center cracked steel plates repaired with CFRP materials

摘要

Fatigue crack behavior of center cracked steel plates repaired with CFRP materials were investigated. Load application angles of 0 degrees, 15 degrees and 30 degrees were conducted through a special loading device. Experimental results from mixed-mode I and II fatigue test results were presented and compared. Fatigue crack propagation, trajectory and failure mode were investigated to evaluate the effects of CFRP repairing, load application angle and initial crack length. The results demonstrated that the effect of CFRP repairing decreased with the enlargement of the load application angle. In comparison, the repairing effect increased with the augment of the crack length. This study represents a contribution to the present state of research on repaired cracked metallic structures under mixed-mode fatigue loading.