자동차 차체 Spot 용접 이음재의 피로설계기준에 관한 연구 (Ⅰ)

다국어 초록 (Multilingual Abstract)

Since fatigue strength of spot weld affects structural rigidity and durability of the spot welded structures, safety and structural integrity of the structure are decided by fatigue strength of spot welded joint. Therefore, accurate stress analysis and reasonable fatigue strength evaluation of spot welded joint are very important to determine its long-life fatigue design criterion. In general, the most typical and traditional method to determine the fatigue design criterion is ΔP-N<SUB>f</SUB> curve. However, since the relationship between fatigue load range (ΔP) and fatigue life (N<SUB>f</SUB>) is variable according to the material properties, the geometrical factors, and the mechanical condition, it is difficult to estimate fatigue strength synthetically taking account into the effects of the various geometrical factors. Thus, in this paper, fatigue design criteria of the spot welded lap joints were assessed using the maximum principle stress at the nugget edge of spot weld.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 유한요소법을 이용한 spot용접 이음재 응력해석
• 3. 최대주응력을 이용한 spot 용접 이음재 형상별 피로강도 평가
• 4. 결론
• 참고문헌