Calculation of Stresses near Holes in Welded Plates Taking Account of the Residual Deformations

Abstract

An algorithm for determining the stress state of plates of different shapes with holes due to residual deformations was suggested. The residual stresses in the plates were determined using the calculation and experimental method. The algorithm for determining the stresses the near the holes in the plates due to residual deformations is based on the method of integral equations. The residual stresses and stresses near the holes were investigated. Stresses near circular holes with different distributions of plastic deformations were investigated. Cases were established, where at the boundary of holes, depending on their location, high compression or tensile stresses may arise. Particular, that high compression stresses appear at the point of intersection of the center of the weld with holes or outer boundary, which high compression stresses are approximately the same for all radii of the holes. In case of the radii of the holes that are smaller than the zone of plasticity, high tensile stresses appear, which decrease, when the size of the holes increases. In case of the radii of holes that are larger than the zone of plasticity, the maximum tensile stresses arise at points close to the boundary of the zone of plasticity.