The Proceedings of the Symposium on Evaluation and Diagnosis
Online ISSN : 2424-3027
2003.2
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Microwave Evaluation of the Shape and Size of 3-D Cracks on the Metal Surface
Yang JUYasuhiro UCHIMURAHitoshi SOYAMAMasumi SAKA
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CONFERENCE PROCEEDINGS FREE ACCESS

Pages 147-149

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Abstract
Crack is the most dangerous defect in machines and structures. Cracking often initiates from the surface of materials, since the surface stress is often higher than the stress of inside when a metal is under load. Nondestructive evaluation of a small crack is always regarded as a difficult but an utmost important issue for the integrity assessment of structural components. Recently, small cracks have been detected successfully by using microwaves under a condition of no contact and without any coupling medium, and a dual frequency technique has been developed to evaluate the size of surface cracks in metals. In the present paper, a study of evaluation of the shape and size of 3-D cracks using an enhanced microwave dual frequency technique is reported.
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© 2003 The Japan Society of Mechanical Engineers
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