Analyzing Weld Joint Efficiency in Metal Inert Gas Welding Using MATLAB Simulink

This study is to improve the efficiency of weld joints in Metal Inert Gas (MIG) welding operations. Determine the strength of the base material of mild steel weld joint at throat thickness, shear stress and normal stress analyzed, residual stress evaluated. MATLAB computer program was employed to validate the results obtained in analyzing the welding parameters on AISI1020 mild steel. The experimental analyses were conducted using 9 mild steel specimens. The maximum residual Von Mises stress operating on a welded joint with a throat thickness of 2mm was 1697.06Mpa in the failure instance, was larger than the ultimate tensile strength of the filler material (583 MPa), and hence the joint collapsed. The throat thickness of the weld was increased by 0.5mm in subsequent trials, and the results revealed that as the throat thickness of the weld joint rose, the strength of the weld joint improved, while the normal stress, shear stress, and Von Mises stress on the weld joint reduced.The maximum stresses on the welded joints specimens with throat thicknesses ranging from 2.0mm to 5.5mm were greater than the filler metal’s ultimate tensile strength, making them unsafe for the joint, except for specimen 9 with a throat thickness of 6mm, which had a maximum stress of 569 MPa, which was less than the filler metal’s ultimate tensile strength of 583 MPa, making the weld joint safe against tensile loading of 36KN.