Study on the suppression of reduction of base metal tensile strength by drilling of thickness-reduced plate repaired by patch plates

Abstract

This study proposes a method to suppress reduction in the bearing capacity of the base metal due to hole pulling when repaired by patch plates thickness-reduced plate. For this purpose, uniaxial tensile tests and finite element analyses were carried out to evaluate different bolt types and bolt arrangements in the first row from the loading position. As a result, the fracture resistance of the model with a larger cross-sectional area of the base metal at the position of the first row of bolts from the loading position was higher. The results also showed axial forces at the sectional defects were similar for different bolt types and bolt arrangements.