Experimental research of fatigue crack development in a rectangular plate
Authors: Andrienko L.A., Brykin K.I.
Published in issue: #10(70)/2017
DOI: 10.18698/2308-6033-2017-10-1683
Category: Mechanics | Chapter: Mechanics of Deformable Solid Body
The article presents the results of the experimental study of vibration parameters of rectangular plates with fatigue cracks loaded in their plane by a cyclically changing bending moment. The description of the original experimental stand where a cyclic load is created by means of a rotating disc installed with an eccentricity is given. Roller guides are installed between the disc and the plate to prevent wear of the plate during the loading. A high correlation of vibration signals obtained from sensors mounted directly on the plate near a crack and on the basis of the experimental stand is shown. It is concluded that for the further analysis of a technical condition of a plate it is possible to use a signal from the gauge mounted outside a plate. The results of the study can be useful for diagnosing plates if the crack in them cannot be detected visually due to the complexity of access to it.
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