구조용 강의 잔류응력과 피로균열진전거동

다국어 초록 (Multilingual Abstract)

Residual stress and fatigue crack propagation behavior of the Grade A mild steel cut by plasma cutting technique for the ship structural material are evaluated by experiments and finite element analysis (FEA). After applied the loads of 0%, 50%, 80% yield strength on each plasma cutting specimen, residual stresses were gauged through the strain changes. Then, these experimental results are compared with the FEA results. Fatigue crack propagation behavior was estimated through the fatigue test performed under R=-1 and 5Hz sine wave repeated load. The constants of paris equation are found from crack growth ratio and changes of stress intensity factor.

목차 (Table of Contents)

• Abstract
• 기호설명
• 1. 서론
• 2. 잔류응력 측정
• 3. 피로균열진전거동
• 4. 피로강도 및 수명시험
• 5. 결론
• 후기
• 참고문헌