Steel-aluminium transition joint T-shaped bilateral space welding process numerical simulation calculation method

Abstract

The invention provides a steel-aluminium transition joint T-shaped bilateral space welding process numerical simulation calculation method, and belongs to the field of welding numerical simulation. The steel-aluminium transition joint T-shaped bilateral space welding process numerical simulation calculation method includes the steps that a three-dimensional or two-dimensional thermal-mechanical coupling calculation model of a steel-aluminium transition joint welding process is established; initial conditions and boundary conditions of the welding model are set; a heat source equation correction method of a T-shaped joint with welding angles is determined; a T-shaped bilateral space welding heat source subprogram is established; a task is submitted and solved, and then pose-processing and analysis are carried out. The steel-aluminium transition joint T-shaped bilateral space welding process numerical simulation calculation method has the advantages of being capable of achieving the purpose that numerical simulation calculation of a temperature field and numerical simulation calculation of a stress field can be conducted synchronously in a three-dimensional or two-dimensional T-shaped joint bilateral space welding process. By establishing a geometric structure of an actual steel-aluminium transition joint and correctly setting a bilateral space welding heat source model with angles, the influences of different welding line energies and bilateral space welding durations on a steel-aluminium interface highest temperature can be predicted, and choices for practical welding process parameters and time intervals of bilateral welding operation are guided.

Description

technical field [0001] The invention belongs to the technical field of welding numerical simulation, in particular to a numerical simulation calculation method for the T-shaped bilateral interval welding process of a steel-aluminum transition joint, which can realize the numerical simulation calculation of the temperature field in the two-dimensional and three-dimensional T-shaped joint bilateral interval welding process . Background technique [0002] In the shipbuilding and automobile industries, in order to achieve energy saving and emission reduction, some structural components began to use aluminum alloy materials instead of steel materials to reduce the quality of the hull or automobile and increase the speed. Due to the large difference in the melting point and material properties of steel and aluminum, direct welding (dissimilar material welding) of steel structures and aluminum structures is difficult and prone to failure. Therefore, at present, steel-aluminum tran...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a numerical simulation calculation method for the welding process of the T-shaped double-sided interval of the steel-aluminum transition joint, which solves the problem of temperature prediction of the steel-aluminum interface during the welding process of the T-shaped double-sided interval of the steel-aluminum transition joint.

For the welding process of marine steel-aluminum transition joints and steel plates, the temperature of the steel-aluminum interface easily exceeds the limit temperature of 350°C, which leads to the degradation of interface performance and crack failure

Images