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A method for determining the location and depth of cracks in double-cracked beams |
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| Authors: | E Douka A Trochidis |
| Institution: | a Mechanics Division, School of Technology, Aristotle University of Thessaloniki, GR-54124 Thessaoloniki, Greece b Department of Electronics, Faculty of Technological Applications, TEI of Thessaloniki, P.O. Box 14561, GR -54101 Thessaloniki, Greece c Physics Division, School of Technology, Aristotle University of Thessaloniki, GR- 54124 Thessaloniki, Greece |
| Abstract: | The influence of two transverse open cracks on the antiresonances of a double cracked cantilever beam is investigated both analytically and experimentally. It is shown that there is a shift in the antiresonances of the cracked beam depending on the location and size of the cracks. These antiresonance changes, complementary with natural frequency changes, can be used as additional information carrier for crack identification in double cracked beams. Experimental results from tests on plexiglas beams damaged at different locations and different magnitudes are found to be in good agreement with theoretical predictions. Based on the results of the present work, an efficient prediction scheme for crack localization and characterization in double cracked beams is proposed. |
| Keywords: | Beam vibration Crack identification Antiresonance frequencies |
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