Abstract

In this study the fatigue crack growth behavior was investigated for the surface cracks in aluminum alloy A5083-O plate and its weldment. Several kinds of specimens were tested at room temperature. The Eccentric specimens(E1.0, E2.5) subjected to combined stresses(tension+bending) were tested and the welded specimens with weld toes(TOE1, TOE2) were tested in order to verify the method to consider the stress concentration such as weld toe. It was ascertained that the surface crack growth property in the weld toe could be predicted by the corrected Pang's equation proposed in this study.

Keywords

• Fail safe design;
• Leak before break;
• A5083-O;
• Eccentric plate;
• Aspect ratio;
• Fatique crack;
• Stress concentration;
• Surface crack;
• Weld toe

• 파괴안전설계;
• 파단 전 누설;
• 편심판;
• 형상비;
• 피로균열;
• 응력집중;
• 표면균열;
• 용접토우부;