{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,16]],"date-time":"2026-05-16T04:04:01Z","timestamp":1778904241868,"version":"3.51.4"},"reference-count":27,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2023,7,26]],"date-time":"2023-07-26T00:00:00Z","timestamp":1690329600000},"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>In this study, a new method for determining the elastic constants of isotropic plates using Lamb wave fundamental modes is presented. This method solves the inverse problem, where the elastic constants (Young\u2019s modulus and Poisson\u2019s ratio) of the plate were estimated by measuring the phase velocities of the Lamb wave using the Rayleigh\u2013Lamb equations to find the solution and determining the phase velocities of the A0 and S0 modes using a new method. The suitability of the proposed method for determining the elastic constants was evaluated using simulated and experimental signals propagating on an aluminum plate. The theoretical modeling on the aluminum 7075-T6 plate shows that the proposed method allows the determination of the Poisson ratio with a relative error not exceeding 2% and Young\u2019s modulus with a relative error not exceeding 0.5%. The experimental measurements of an aluminum plate of known thickness (2 mm) and density (2685 kg\/m3) confirmed the suitability of the proposed method for the measurements of elastic constants. In the proposed method, the processing of ultrasonic signals can be performed in real-time, and the values of the elastic constants can be obtained immediately after scanning the required distance.<\/jats:p>","DOI":"10.3390\/s23156678","type":"journal-article","created":{"date-parts":[[2023,7,27]],"date-time":"2023-07-27T02:14:48Z","timestamp":1690424088000},"page":"6678","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Determining the Elastic Constants of Isotropic Materials by Measuring the Phase Velocities of the A0 and S0 Modes of Lamb Waves"],"prefix":"10.3390","volume":"23","author":[{"given":"Olgirdas","family":"Tum\u0161ys","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"}]},{"given":"Liudas","family":"Ma\u017eeika","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":[[2023,7,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Blitz, J. (1997). Electrical and Magnetic Methods of Non-Destructive Testing, Springer.","DOI":"10.1007\/978-94-011-5818-3"},{"key":"ref_2","unstructured":"Hellier, C.J. (2013). Handbook of Nondestructive Evaluation, McGraw-Hill Companies. [2nd ed.]."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Staszewski, W.J., Boller, C., and Tomlinson, G.R. (2004). 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