Experimental study shows increased fatigue resistance in cracked steel plates repaired with CFRP and stop holes, suggesting effectiveness for structural integrity.
This paper discusses the behavior of cracked steel plates in mixed cracking modes I/II, repaired using CFRP (Carbon Fiber Reinforced Polymer) materials and a stop hole under fatigue loading conditions. The study aims to evaluate the effectiveness of CFRP and stop holes as a repair method for enhancing the fatigue resistance of cracked steel structures. The experimental was tested under eccentric axial fatigue cyclic loading till failure in pure mode I and mixed mode (I/II) with a 45° angle. It was found that from test results, the fatigue life of steel plates strengthened with CFRP increased by 1.4 times when compared to un-strengthened steel plates. The fatigue life of steel plates strengthened with a stop hole increased by a factor of 1.45 compared to un-strengthened steel plates. The fatigue life of steel plates strengthened with CFRP and stop hole increased by a factor of 1.49 compared to un-strengthened steel plates.
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Khaled et al. (2025) studied this question.
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