METHOD AND DEVICE FOR TESTING FATIGUE UTILIZING RESONANCE

PURPOSE:To provide a method and device for testing fatigue by which fatigue data can be obtained in a short time and, at the same time, the cracking of a test piece due to fatigue can be surely recognized without requiring any visual inspection. CONSTITUTION:When a test piece 100 is made to resonate...

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Bibliographische Detailangaben
Hauptverfasser:	HIRATA MAMORU, MIYAGI HIROSHI, OGAWA YOSHIHIRO, MIYAI ICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PURPOSE:To provide a method and device for testing fatigue by which fatigue data can be obtained in a short time and, at the same time, the cracking of a test piece due to fatigue can be surely recognized without requiring any visual inspection. CONSTITUTION:When a test piece 100 is made to resonate by giving vibrations caused by a loudspeaker 23 while one end of the test piece 100 is supported in the state of a cantilever, the amplitude of the test piece 100 decreases, because the characteristic frequency of the test piece 100 is deviated from the resonance point as the fatigue at the stress concentration part progresses. Therefore, the fatigue of the test piece can be detected when the amplitude of the test piece 100 is measured with a displacement measuring means 3.