The Proceedings of the Materials and Mechanics Conference
Online ISSN : 2424-2845
2014
Session ID : OS2120
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OS2120 Measurement of Small Fatigue Crack Opening Stress Magnetostriction
Yosuke SUZUKIYoshihito KUROSHIMA
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
The general method is not always effective for the measurement of fatigue small crack growth properties by relation of accuracy and a device characteristic. Non-contact and the highly precise measurement are expected by the use of a magnetostriction effect to apply in this study. The small crack growth properties measurement by a magnetic field change with the magnetostriction effect that was one of a characteristic of magnetism of ferromagnetic substance was studied. Using a coil, a magnetic field change with magnetostriction effect was detected, and the waveform change of the output was inspected. The experiment result was revealed that the small crack affects a magnetic field change by a magnetostriction effect.
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© 2014 The Japan Society of Mechanical Engineers
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