Stress-Strain State Simulation of Welded Plate

Abstract

Background. The most important task in choosing the shape of the structural elements of the ship's hull is to ensure sufficient strength with a small mass. In recent years, great progress has been made in shipbuilding thanks to the use of modern welding methods for connecting parts and components. Ships hulls have become much lighter than when using riveted joints due to the transition to welding. A welded joint can provide optimum corrosion resistance, strength and economy of manufacture. However, it must be remembered that any metal, including stainless steels, may undergo certain changes during welding. Therefore, it is necessary to exercise a reasonable degree of caution during the welding process. In recent years, simulation has become a very popular method for studying processes and phenomena. In addition to mathematical methods, more and more often, authors from all over the world are starting to use simulation modeling as the main research method and compare the results with theoretical or experimental ones. There are many software products that allow you to create geometric models of objects of varying complexity. One such program is SolidWorks, which was chosen to create the geometric models in this study.Objective. Therefore, the purpose of this work is to conduct geometrical modeling (construction of threedimensional models) and simulation (study of the object by its model) of a metal plate with a weld. Also, a liquidconstruction interaction analysis will be carried out to determine the stress-strain state of the metal plate (ship's hull element) with welds of different geometric shapes in the cross-section.Results. In this work, a three-dimensional model of the ship's hull element with welded seams was built. To determine the vector fields of the velocity of water flow and its pressure in the ANSYS software package, a simulation of the load on the hull element was carried out using its constructed geometric model. The analysis of the obtained results made it possible to determine the stress-strain state of the ship's hull element.Conclusions. Three forms of welds are considered, namely: V-shaped, Y-shaped and X-shaped. It is shown that at a flow rate of 5m/s the minimum load is less than at least three times for the X-shaped (double-sided) weld. The maximum loads within the hull element of the ship are almost the same. It is shown that the smallest stress within the welds (without considering the plate) arises when using an X-shaped weld. In further research it is planned to investigate the effect of loads from the water stream on the damaged weld seams.