{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,16]],"date-time":"2026-05-16T04:04:00Z","timestamp":1778904240477,"version":"3.51.4"},"reference-count":30,"publisher":"MDPI AG","issue":"20","license":[{"start":{"date-parts":[[2021,10,13]],"date-time":"2021-10-13T00:00:00Z","timestamp":1634083200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Ultrasonic guided waves are already used for material characterization. The advantage of these waves is that they propagate in the plane of a plate and their propagation characteristics are sensitive to properties of the material. The objective of this research was to develop an ultrasonic method that could be used to measure the properties of thin plastic polyvinylchloride films (PVC). The proposed method exploits two fundamental Lamb wave modes, A0 and S0, for measurement of a thin film thickness and Young\u2019s modulus. The Young\u2019s modulus is found from the measured phased velocity of the S0 mode and the film thickness from the velocities of both A0 and S0 modes. By using the proposed semi-contactless measurement algorithm, the Young\u2019s modulus and thickness of different thickness (150 \u00b5m and 200 \u00b5m) PVC films were measured. The uncertainty of thickness measurements of the thinner 150 \u00b5m PVC film is 2% and the thicker 200 \u00b5m PVC film is 3.9%.<\/jats:p>","DOI":"10.3390\/s21206779","type":"journal-article","created":{"date-parts":[[2021,10,13]],"date-time":"2021-10-13T21:48:39Z","timestamp":1634161719000},"page":"6779","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Simultaneous Measurement of Thickness and Elastic Properties of Thin Plastic Films by Means of Ultrasonic Guided Waves"],"prefix":"10.3390","volume":"21","author":[{"given":"Rymantas Jonas","family":"Ka\u017eys","sequence":"first","affiliation":[{"name":"Ultrasound Research Institute, Kaunas University of Technology, K. Bar\u0161ausko St. 59, LT-51423 Kaunas, Lithuania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7683-316X","authenticated-orcid":false,"given":"Olgirdas","family":"Tum\u0161ys","sequence":"additional","affiliation":[{"name":"Ultrasound Research Institute, Kaunas University of Technology, K. Bar\u0161ausko St. 59, LT-51423 Kaunas, Lithuania"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,10,13]]},"reference":[{"key":"ref_1","unstructured":"Green, R.E. (1973). Ultrasonic Investigation of Mechanical Properties, in Treatise on Materials Science and Technology, Academic Press."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1080\/09349849509409557","article-title":"Elastic property measurement using Rayleigh-Lamb Waves","volume":"6","author":"Rogers","year":"1995","journal-title":"Res. Nondestr. 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