The Proceedings of Mechanical Engineering Congress, Japan
Online ISSN : 2424-2667
ISSN-L : 2424-2667
2012
Session ID : J041034
Conference information
J041034 Detection of Small Cracks for Rotating Bending Fatigue Specimens : The First Report; A Method with Measuring Small Displacement during Fatigue Test
Tsuyoshi FUJITATetsuya ASAIKenichi TANAKAYuhzoh ANDOH
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Abstract
A replica method is commonly used to detect a crack initiation and propagation for rotating bending fatigue cracks. But in this method, a length of crack on the surface can be detected at only the certain cycles, and can't detect the crack initiation accurately or observe the change of fatigue crack length continuously. In this report, small fatigue cracks are detected by measuring the displacement at a notch root of specimens during fatigue test with a laser displacement meter. As a result, we can observe the propagation of fatigue cracks by measuring the amount of displacement change in real time.
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© 2012 The Japan Society of Mechanical Engineers
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