WELDING DISTORTION ANALYSIS ON WELDING JIG/FIXTURE USING FINITE ELEMENT METHOD

Abstract

In the fabrication processes associated with the marine and oil/gas industries, the Indonesian city of Batam is home to numerous welding operations the most frequent of which is SMAW (Shield Metal Arc Welding). The primary disadvantage of this joining process however is that all of these techniques require a high heat to melt the components together and cause distortion. One such material that used are ASTM A36. to counter this problem is making a support to adjust the material prior welding that called Jig/Fixture since welding distortion occur when welding process it made. with the purpose to maintain the material to be adjust in a fixed position so that even after weld its still maintain its designated position. so it need more study for consideration during the tool design phase, and with that a computerized analysis using Finite Element Method (FEM) program to help knowing deformation pattern, thermal response of T-Joint Weld under applied load that can obtain approximated result. The result of the analysis with T-Joint A-36 material with 277.41 MPa is the stress value (von mises). The material type of ASTM A-36 has a deformation value of 0.77 mm. In the meantime, 15 is the safety factor value for the material type of mild steel. Thus, substance with a safety factor value of ≥1, mild steel material is deemed safe to employ as a supporting fixture in this design.