{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T21:29:55Z","timestamp":1785446995962,"version":"3.56.0"},"reference-count":29,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2022,10,14]],"date-time":"2022-10-14T00:00:00Z","timestamp":1665705600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Tomsk Polytechnic University Development Program","award":["2030-NIP-EB-008-0000-2022"],"award-info":[{"award-number":["2030-NIP-EB-008-0000-2022"]}]},{"name":"Tomsk Polytechnic University Development Program","award":["19-29-13004"],"award-info":[{"award-number":["19-29-13004"]}]},{"name":"Tomsk Polytechnic University Development Program","award":["22-19-00103"],"award-info":[{"award-number":["22-19-00103"]}]},{"name":"Tomsk Polytechnic University Development Program","award":["42-01-09\/169\/2021-4"],"award-info":[{"award-number":["42-01-09\/169\/2021-4"]}]},{"name":"Russian Foundation for Basic Research","award":["2030-NIP-EB-008-0000-2022"],"award-info":[{"award-number":["2030-NIP-EB-008-0000-2022"]}]},{"name":"Russian Foundation for Basic Research","award":["19-29-13004"],"award-info":[{"award-number":["19-29-13004"]}]},{"name":"Russian Foundation for Basic Research","award":["22-19-00103"],"award-info":[{"award-number":["22-19-00103"]}]},{"name":"Russian Foundation for Basic Research","award":["42-01-09\/169\/2021-4"],"award-info":[{"award-number":["42-01-09\/169\/2021-4"]}]},{"name":"Russian Science Foundation","award":["2030-NIP-EB-008-0000-2022"],"award-info":[{"award-number":["2030-NIP-EB-008-0000-2022"]}]},{"name":"Russian Science Foundation","award":["19-29-13004"],"award-info":[{"award-number":["19-29-13004"]}]},{"name":"Russian Science Foundation","award":["22-19-00103"],"award-info":[{"award-number":["22-19-00103"]}]},{"name":"Russian Science Foundation","award":["42-01-09\/169\/2021-4"],"award-info":[{"award-number":["42-01-09\/169\/2021-4"]}]},{"name":"Sevastopol State University","award":["2030-NIP-EB-008-0000-2022"],"award-info":[{"award-number":["2030-NIP-EB-008-0000-2022"]}]},{"name":"Sevastopol State University","award":["19-29-13004"],"award-info":[{"award-number":["19-29-13004"]}]},{"name":"Sevastopol State University","award":["22-19-00103"],"award-info":[{"award-number":["22-19-00103"]}]},{"name":"Sevastopol State University","award":["42-01-09\/169\/2021-4"],"award-info":[{"award-number":["42-01-09\/169\/2021-4"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The technique of 3D scanning laser Doppler vibrometry has recently appeared as a promising tool of nondestructive evaluation of discontinuity-like defects in composite polymers. The use of the phenomenon of local defect resonance (LDR) allows intensifying vibrations in defect zones, which can reliably be detected by means of laser vibrometry. The resonance acoustic stimulation of structural defects in materials causes compression\/tension deformations, which are essentially lower than the material tensile strength, thus proving a nondestructive character of the LDR technique. In this study, the propagation of elastic waves in composites and their interaction with structural inhomogeneities were analyzed by performing 3D scanning of vibrations in Fast Fourier Transform mode. At each scanning point, the in-plane (x, y) and out of plane (z) vibration components were analyzed. The acoustic stimulation was fulfilled by generating a frequency-modulated harmonic signal in the range from 50 Hz to 100 kHz. In the case of a reference plate with a flat bottom hole, the resonance frequencies for all (x, y, and z) components were identical. In the case of impact damage in a carbon fiber reinforced plastic sample, the predominant contribution into total vibrations was provided by compression\/tension deformations (x, y vibration component) to compare with vibrations by the z coordinate. In general, inspection results were enhanced by analyzing total vibration patterns obtained by averaging results at some resonance frequencies.<\/jats:p>","DOI":"10.3390\/ma15207176","type":"journal-article","created":{"date-parts":[[2022,10,17]],"date-time":"2022-10-17T02:29:46Z","timestamp":1665973786000},"page":"7176","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Detecting Defects in Composite Polymers by Using 3D Scanning Laser Doppler Vibrometry"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2142-856X","authenticated-orcid":false,"given":"Daria A.","family":"Derusova","sequence":"first","affiliation":[{"name":"Industrial Tomography Center, Tomsk Polytechnic University, 634050 Tomsk, Russia"},{"name":"Research Lab. of Catalytic and Biomedical Technologies, Sevastopol State University, 299053 Sevastopol, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vladimir P.","family":"Vavilov","sequence":"additional","affiliation":[{"name":"Industrial Tomography Center, Tomsk Polytechnic University, 634050 Tomsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nikolay V.","family":"Druzhinin","sequence":"additional","affiliation":[{"name":"Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, 634055 Tomsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Victor Y.","family":"Shpil\u2019noi","sequence":"additional","affiliation":[{"name":"Industrial Tomography Center, Tomsk Polytechnic University, 634050 Tomsk, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9034-4733","authenticated-orcid":false,"given":"Alexey N.","family":"Pestryakov","sequence":"additional","affiliation":[{"name":"Industrial Tomography Center, Tomsk Polytechnic University, 634050 Tomsk, Russia"},{"name":"Research Lab. of Catalytic and Biomedical Technologies, Sevastopol State University, 299053 Sevastopol, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"3690","DOI":"10.1021\/acsbiomaterials.2c00786","article-title":"Recent Advances in Designing Fibrous Biomaterials for the Domain of Biomedical, Clinical, and Environmental Applications","volume":"8","author":"Mamidi","year":"2022","journal-title":"ACS Biomater. 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