JSME International Journal Series A Solid Mechanics and Material Engineering
Online ISSN : 1347-5363
Print ISSN : 1344-7912
ISSN-L : 1344-7912
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A Method for Sizing Small Fatigue Cracks in Stainless Steel Using Microwaves
Masumi SAKAYang JUDaying LUOHiroyuki ABÉ
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2002 Volume 45 Issue 4 Pages 573-578

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Abstract

To evaluate the depth of small fatigue cracks under conditions of no contact and without using any coupling medium, a novel microwave technique was demonstrated. An open-ended coaxial line sensor was used to increase the spatial resolution and the ratio of signal to noise. Closed fatigue cracks were detected successfully and a W-shaped characteristic signal was obtained. A dual frequency technique was proposed to evaluate the depth of small fatigue cracks for which crack closure characteristics were unknown. The evaluated results are shown to agree well with the actual values.

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© 2002 by The Japan Society of Mechanical Engineers
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