Authors : Ahmed M. Khaled; Sherif A. Mourad; Nabil S. Mahmoud; Fikry A. Salem

Volume/Issue : Volume 10 - 2025, Issue 7 - July

Google Scholar : https://tinyurl.com/4arz322r

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DOI : https://doi.org/10.38124/ijisrt/25jul902

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Abstract : 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.

Keywords : Steel Plates, CFRP, Stop Hole, Cracks, Mixed Mode Fatigue.

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