지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Welding is one of the techniques to be widely used in the modern industrial sites, and it has been known that the stress caused by the heat source applied to the parent metal during the welding process greatly influence on the weldability. The nonlinear deformation is occurred according to the heat conduction in the welds, and if such deformation is restricted by external force, the residual stress is left in the welds and it will act as defects. In this study, the temperature and stress that are occurred during the laser welding process by applying SCP1-S, are numerically and experimentally analyzed. The author derived the results on heating and cooling in order to predict the stress generated by conducting of the laser welding process. In addition, the change of the stress according to cooling time was grasped, and the stress predicted by the numerical analysis was compared to the results by Hole-Drilling Stress Technique. Finally, that the direction of the main stress during the welding process is the stress in the width direction of the bead, and the stress of welding progress direction at the point away from beads largely appears was confirmed to be caused by the stress and deformation of parent metal according to the thermal impact. It was confirmed that when welding process is progressed, the change from compression stress to tensile stress significantly appeared, and the point a certain distance away from the weld bead appears the slow change of stress.
목차
Abstract
1. Introduction
2. Thermal Stress of Metallic Materials
3. Finite Element Analysis and Experimental Condition
4. Results and Consideration
5. Conclusions
REFERENCES
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UCI(KEPA) : I410-ECN-0101-2014-320-002413487