Repair of cracks in materials by the composite patch is one of the best methods. A composite patch is a repair procedure that keeps the weight of the original material almost unchanged. Researchers who worked in the repair of materials for decades contributed to the restoration of cracks, notches, and fractures, leading to improvement in service life and corrosion resistivity. Also, simple conformance to sophisticated aerodynamic shapes corresponds to the retardation of the Stress Intensity Factor (SIF). This paper focuses on the advantages of the patch and various research on fatigue crack growth is presented.

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