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In this study, the repairability of oval notched 304 austenitic stainless steel plate with carbon/epoxy composite patch was experimentally investigated. In this context, 250x40 mm test specimens were cut from 2 mm thick steel plate and in the CNC machine, oval notches 20x4 mm sized were opened in three diffrent directions on their centers. Carbon fiber reinforced composite patches were then prepared to patch these notches. The composites used in patches were produced by applying epoxy to triaxial fabrics by hand lay-up method and then hot pressing. Composite patches were cut from composite plates with water jet. These patches were then affixed with Weicon RK7100 adhesive to one-sided and double-sided notched steel plates. Before the adhesion process, the dirt and residue layer on the surfaces of the plates were cleaned with a rotary felt. Then, by spraying solvent-based surface cleaner on the samples, a perfect adhesion surface was obtained. After the bonding process was completed, the samples were kept for three days in order for the adhesive to cure. When the samples were in their final form, static tensile tests were performed, tensile stresses were determined and comparisons were made on the graphics for each angle value without patches, one way patches and two way patches. It was found that the critical yield strength of the patched specimens was significantly improved comparaed to the unpatched samples. There was no sinificant difference between the patched and non-patched samples in the ultimate tensile strength.

Kompozit Yama ile Tamir Edilmiş Oval Çentikli Çelik Plakanın Çekme Dayanımının Deneysel Olarak Araştırılması