Analisis Heat Input terhadap Geometri Hasil Pengelasan FCAW Menggunakan Finite Element Method (FEM)

Abstract

Welding is one of the most important processes in the maritime industry for joining metal materials. One of the welding methods commonly used in the maritime industry is Flux-Cored Arc Welding (FCAW). However, there are several challenges encountered in the welding process, one of which is distortion. One of the factors causing distortion in the welding process is heat input. This study aims to analyze the effect of heat input on distortion in FCAW welding results on BKI Grade A steel using the Finite Element Method (FEM) in ANSYS Workbench software with a Transient Thermal and Static Structural approach. Heat input significantly affects the magnitude of distortion, where higher heat input results in greater distortion. This study varied two parameters in heat input: voltage and current strength, with variations of 21V, 110A; 21V, 150A; 21V, 190A; 30V, 110A; 30V, 150A; 30V, 190A. The heat input that produced the minimum distortion value was the 21V 110A variation, which was -0.029303 mm. Therefore, it can be concluded that selecting the appropriate welding parameters is crucial for minimizing distortion in BKI Grade A steel plates.