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ESPI를 이용한 곡관 감육 결함부의 변형률 분포 측정
아흐터 나심(Akhter Naseem),김경석(Koung-Suk Kim),정성욱(Sung-Wook Jung),박종현(Jong-Hyun Park),최정석(Jung-Suk Choi),정현철(Hyun-Chul Jung) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Put Abstract text here The strain distribution measurement for wall thinned pipe bends by ESPI is presented. Defect types observed in the steel piping in the nuclear power plants (NPP) are the crack at the weld part and the wall thinning defect in the pipe bends. Especially, the wall thinning defects in the pipe bends due to the flow-accelerated corrosion (FAC) is a main type of defects observed in the carbon steel piping system. ESPI is one of the optical non-destructive testing methods and can measure the stress and the strain distribution of the object subjected by the tensile loading or the internal pressure. In this paper, the strain distribution of the wall thinned pipe bends due to the internal pressure will be measured by ESPI technique and the results are discussed. From the results, the size of the wall thinning defect can also be measured approximately.