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김경수(Kyungsu Kim),김경석(Kyeongseok Kim),정현철(Hyunchul Jung),장호섭(Hosub Chang),정성욱(Seongwok Jung) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The objective of this paper is to investigate the roughness of fracture crack surfaces of CT specimens. In the test, the CT specimens were loaded by a fatigue testing machine with changing loads until they were broken. The roughness of the fracture crack surfaces thereafter were measured by digital holographic interferometer (DHI), high. From the results, it was confirmed that DHI could measure the roughness of the various types of the crack surface. In this paper, finally a possibility to predict the magnitude of loads by roughness measurement of the fracture crack surface was proposed.