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T-joint 필렛 용접 하중 및 용접부 갭에 따른 피로 특성 연구
안희태(Heetae Ahn),채홍윤(Hongyun Chae),최돈현(Donhyun Choi),김성겸(Sunggyum Kim) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
Welding is widely used in the automobile industry, but suspension parts are exposed to various load conditions and are vulnerable to fatigue damage in the welding part. Durability problems occur in areas where gas metal arc welding of subframes and arms is applied. In this study, the fatigue characteristics according to the load direction were analyzed through specimen tests for the T-joint fillet welding structure where welding cracks usually occur, and the fatigue limit according to the gap of the welding part was compared. For each load, the fatigue limit load was compared 300,000 cycles times for each condition of the welding part gap 0, 0.5mm. 1.0mm in the load direction in the tensile, shear, and ± bending directions. Through this, when designing suspension parts, a method for robust design depending on the load direction was identified, and in T-fillet welding, the penetration of the root part had a significant effect on the fatigue durability of the welding part.