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- W2089047657 abstract "용접 잔류응력은 용접공정에서 발생하는 하는데, 용접 구조물의 결함 유발 및 파괴의 주요 원인이 된다. 본 논문에서는 전자 처리 레이저 스페클 간섭법을 이용하여 원전 배관의 용접부 잔류응력을 측정하였다. 인장시험기를 이용하여 용접된 배관에 압축 하중을 가하였으며, 면내 변형 측정 간섭계를 이용하여 용접부와 모재부의 변형을 측정하였고, 제안된 수식에 의하여 탄성계수를 측정하였다. 용접 배관에 가해지는 하중에 따라 변형이 일정하게 증가하며, 용접 배관의 모재부와 용접부에 발생한 변형을 비교하였을 때, 모재부의 변형이 더 크게 나타남을 확인할 수 있었다. 용접 배관 모재부의 탄성계수는 202.46 GPa, 용접부의 탄성 계수는 212.14 GPa, 잔류응력은 6.29 MPa로 측정되었다. Residual stresses that occur during the welding process, are the main cause of failure and defects in welded structures. This paper, presents the use of an electronic processing laser speckle interferometer to measure the residual stress of a welded pipe for a nuclear power plant. A tensile testing machine was used to evaluate a welded pipe that failed in compression. The inform plane deformation and modulus of elasticity of the base metal and welds were measured using an interferometer. Varying the load on the welded pipe had a larger effect on the deformation of the base metal the other properties of the base metal and welds. The elastic moduli of the base metal and weld of the welded pipe were 202.46 and 212.14 GPa, respectively, the residual stress was measured to be 6.29 MPa." @default.
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- W2089047657 date "2014-02-28" @default.
- W2089047657 modified "2023-10-04" @default.
- W2089047657 title "Evaluation of Residual Stress on Pipe Welded Joints Using Laser Interferometry" @default.
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- W2089047657 doi "https://doi.org/10.7779/jksnt.2014.34.1.18" @default.
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