A study of repaired aluminum (2024-T3) plate with a central circular notch by different shapes of adhesively composite patch

The influence of various patch shapes with different composite materials on the behavior of the repaired aluminum (2024-T3) plate with a central circular notch was investigated. Finite element analysis FEA for different scenarios of the repaired plate has been performed to obtain normal stress σ Y and stress concentration factor SCF. Comparison of FEA results was done to investigate the effect of parameters such as the material and shape patch. Also, the comparison between the effects of using a single patch and a double patch on the repaired plate was done. In the analysis, the patch shapes considered with the same volume are rectangular, circular, trapezoidal, triangle, regular hexagonal, rotated regular hexagonal, elliptical, rotated elliptical. Based on the reduction of SCF and σ Y , the comparison of results revealed that the optimum composite patch shape applied on a central circular notch plate, repaired, depends on the repair method, i.e., using a single or double patch. The optimum patch shape is a rotated regular hexagonal shape when using a single patch, but a rectangular shape when using a double patch.