PMID- 36295311 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221030 IS - 1996-1944 (Print) IS - 1996-1944 (Electronic) IS - 1996-1944 (Linking) VI - 15 IP - 20 DP - 2022 Oct 17 TI - Excitation and Reception of Higher-Order Guided Lamb Wave's A(1) and S(1) Modes in Plastic and Composite Materials. LID - 10.3390/ma15207249 [doi] LID - 7249 AB - Contemporary technologies are employing composite plate materials developed by using various innovative materials (nanostructures, mica structures, etc.). Application of higher-order modes could allow better detection and characterization of defects characteristic of planar plastic and composite structures, mainly due to shorter wavelength. However, excitation of higher-order modes meets many problems, especially in the case of the air-coupled technique, and is not sufficiently investigated. This is relevant in the cases of paper, high-density polyethylene (HDPE), membranes, GFRP, GLARE, CFRP and other composite structures. The objective of the paper was investigation of the excitation and reception of higher-order guided Lamb wave modes in plastic and composite plates. Therefore, it is appropriate to develop new non-contact ultrasonic measurement methods based on the excitation and reception of guided waves for the study of such objects. The obtained results clearly demonstrate the possibility to excite and receive efficiently different higher-order guided Lamb wave modes with very different phase velocities. The presented comparison of the experimental results with the simulation results showed a good agreement. The combination of air-coupled excitation and non-contact reception enables a non-destructive evaluation and characterization of moving plastic objects and composite structures. FAU - Kazys, Rymantas Jonas AU - Kazys RJ AD - Prof. K. Barsauskas Ultrasound Research Institute, Kaunas University of Technology, 51423 Kaunas, Lithuania. FAU - Sestoke, Justina AU - Sestoke J AUID- ORCID: 0000-0003-0169-5185 AD - Prof. K. Barsauskas Ultrasound Research Institute, Kaunas University of Technology, 51423 Kaunas, Lithuania. FAU - Mazeika, Liudas AU - Mazeika L AD - Prof. K. Barsauskas Ultrasound Research Institute, Kaunas University of Technology, 51423 Kaunas, Lithuania. LA - eng GR - No 09.3.3-LMT-K-712 409/European Social Fund under the No 09.3.3-LMT-K-712 409 "Development of Competences of Scientists, other Researchers and Students through Practical Re- 410 search Activities"/ GR - No. P-MIP-22-70/Research Council of Lithuania (LMTLT)/ PT - Journal Article DEP - 20221017 PL - Switzerland TA - Materials (Basel) JT - Materials (Basel, Switzerland) JID - 101555929 PMC - PMC9611229 OTO - NOTNLM OT - Lamb waves OT - air-coupled ultrasonic OT - composite materials OT - elastic properties COIS- The authors declare no conflict of interest. EDAT- 2022/10/28 06:00 MHDA- 2022/10/28 06:01 PMCR- 2022/10/17 CRDT- 2022/10/27 01:36 PHST- 2022/09/02 00:00 [received] PHST- 2022/10/10 00:00 [revised] PHST- 2022/10/12 00:00 [accepted] PHST- 2022/10/27 01:36 [entrez] PHST- 2022/10/28 06:00 [pubmed] PHST- 2022/10/28 06:01 [medline] PHST- 2022/10/17 00:00 [pmc-release] AID - ma15207249 [pii] AID - materials-15-07249 [pii] AID - 10.3390/ma15207249 [doi] PST - epublish SO - Materials (Basel). 2022 Oct 17;15(20):7249. doi: 10.3390/ma15207249.