| Title |
Research papers / Mechanical Behaviors : Analysis of Bending Residual Stress in SS400 Steel Beam Using Continuous Indentation Technique and Stress Interaction Model |
| Authors |
장재일(Jae Il Jang),권동일(Dong Il Kwon),이윤희(Yun Hee Lee),지원재(Won Jae Ji),손동일(Dong Il Soh) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
Apparent mechanical properties of welded structural components are deviated from the initially designed values due to the residual stress. Thus, exact assessment of the residual stress using a nondestructive method became an important issue in reliability researches. A nanoindentation model for evaluating the equi-biaxial thin film residual stress was proposed in the previous study. However, the surface residual stress in the welded joint is a non-equi-biaxial state and complex elastic/plastic deformations are involved in the macroindentation. Therefore, the previous model was modified to evaluate the real non-equi-biaxial residual stress by considering a new stress-proportional factor and a significant effect of the plasticity. The newly modified stress-analyzing model was verified empirically by comparing the evaluated uniaxial stress with the already known residual stress of 4-point bended specimen. |