[{"date_updated":"2026-02-02T12:44:47Z","oa":"1","volume":247,"author":[{"full_name":"Itner, Dominik","last_name":"Itner","first_name":"Dominik"},{"first_name":"Dmitrij","last_name":"Dreiling","id":"32616","full_name":"Dreiling, Dmitrij"},{"first_name":"Hauke","full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp"},{"id":"213","full_name":"Henning, Bernd","last_name":"Henning","first_name":"Bernd"},{"first_name":"Carolin","last_name":"Birk","full_name":"Birk, Carolin"}],"doi":"https://doi.org/10.1016/j.ymssp.2026.113904","main_file_link":[{"open_access":"1","url":"https://www.sciencedirect.com/science/article/pii/S0888327026000610/pdfft?md5=16e8493b44527f4ab0a6d13f634a01c3&pid=1-s2.0-S0888327026000610-main.pdf"}],"publication_identifier":{"issn":["0888-3270"]},"publication_status":"published","page":"113904","intvolume":"       247","citation":{"ama":"Itner D, Dreiling D, Gravenkamp H, Henning B, Birk C. A modified Levenberg–Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses. <i>Mechanical Systems and Signal Processing</i>. 2026;247:113904. doi:<a href=\"https://doi.org/10.1016/j.ymssp.2026.113904\">https://doi.org/10.1016/j.ymssp.2026.113904</a>","chicago":"Itner, Dominik, Dmitrij Dreiling, Hauke Gravenkamp, Bernd Henning, and Carolin Birk. “A Modified Levenberg–Marquardt Method for Estimating the Elastic Material Parameters of Polymer Waveguides Using Residuals between Autocorrelated Frequency Responses.” <i>Mechanical Systems and Signal Processing</i> 247 (2026): 113904. <a href=\"https://doi.org/10.1016/j.ymssp.2026.113904\">https://doi.org/10.1016/j.ymssp.2026.113904</a>.","ieee":"D. Itner, D. Dreiling, H. Gravenkamp, B. Henning, and C. Birk, “A modified Levenberg–Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses,” <i>Mechanical Systems and Signal Processing</i>, vol. 247, p. 113904, 2026, doi: <a href=\"https://doi.org/10.1016/j.ymssp.2026.113904\">https://doi.org/10.1016/j.ymssp.2026.113904</a>.","mla":"Itner, Dominik, et al. “A Modified Levenberg–Marquardt Method for Estimating the Elastic Material Parameters of Polymer Waveguides Using Residuals between Autocorrelated Frequency Responses.” <i>Mechanical Systems and Signal Processing</i>, vol. 247, 2026, p. 113904, doi:<a href=\"https://doi.org/10.1016/j.ymssp.2026.113904\">https://doi.org/10.1016/j.ymssp.2026.113904</a>.","bibtex":"@article{Itner_Dreiling_Gravenkamp_Henning_Birk_2026, title={A modified Levenberg–Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses}, volume={247}, DOI={<a href=\"https://doi.org/10.1016/j.ymssp.2026.113904\">https://doi.org/10.1016/j.ymssp.2026.113904</a>}, journal={Mechanical Systems and Signal Processing}, author={Itner, Dominik and Dreiling, Dmitrij and Gravenkamp, Hauke and Henning, Bernd and Birk, Carolin}, year={2026}, pages={113904} }","short":"D. Itner, D. Dreiling, H. Gravenkamp, B. Henning, C. Birk, Mechanical Systems and Signal Processing 247 (2026) 113904.","apa":"Itner, D., Dreiling, D., Gravenkamp, H., Henning, B., &#38; Birk, C. (2026). A modified Levenberg–Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses. <i>Mechanical Systems and Signal Processing</i>, <i>247</i>, 113904. <a href=\"https://doi.org/10.1016/j.ymssp.2026.113904\">https://doi.org/10.1016/j.ymssp.2026.113904</a>"},"_id":"63800","project":[{"_id":"89","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren"}],"department":[{"_id":"49"}],"user_id":"32616","type":"journal_article","status":"public","date_created":"2026-01-29T08:53:42Z","title":"A modified Levenberg–Marquardt method for estimating the elastic material parameters of polymer waveguides using residuals between autocorrelated frequency responses","year":"2026","keyword":["Material parameter estimation","Waveguide","Nonlinear optimization","Inverse problem","Least squares"],"language":[{"iso":"eng"}],"publication":"Mechanical Systems and Signal Processing","abstract":[{"text":"In this contribution, we address the estimation of the frequency-dependent elastic parameters of polymers in the ultrasound range, which is formulated as an inverse problem. This inverse problem is implemented as a nonlinear regression-type optimization problem, in which the simulation signals are fitted to the measurement signals. These signals consist of displacement responses in waveguides, focusing on hollow cylindrical geometries to enhance the simulation efficiency. To accelerate the optimization and reduce the number of model evaluations and wait times, we propose two novel methods. First, we introduce an adaptation of the Levenberg–Marquardt method derived from a geometrical interpretation of the least-squares optimization problem. Second, we introduce an improved objective function based on the autocorrelated envelopes of the measurement and simulation signals. Given that this study primarily relies on simulation data to quantify optimization convergence, we aggregate the expected ranges of realistic material parameters and derive their distributions to ensure the reproducibility of optimizations with proper measurements. We demonstrate the effectiveness of our objective function modification and step adaptation for various materials with isotropic material symmetry by comparing them with the Broyden–Fletcher–Goldfarb–Shanno method. In all cases, our method reduces the total number of model evaluations, thereby shortening the time to identify the material parameters.","lang":"eng"}]},{"status":"public","abstract":[{"text":"In diesem Forschungsprojekt wurde ein Messverfahren zur Bestimmung akustischer Materialparameter von Polymeren im Ultraschallfrequenzbereich entwickelt. Das Verfahrens sollte, die üblichen standardisierten Prüfmethoden erweitern, die bislang primär im quasistatischen oder niederfrequenten Bereich eingesetzt wurden. Im Gegensatz zu bestehenden Verfahren wie dem Zeitstandversuch oder der Dynamisch Mechanischen Analyse (DMA) nach [DIN6721] sollte die neue Methode eine nicht-invasive Charakterisierung der (visko-)elastischen Materialparameter im Frequenzbereich von 0,75 MHz bis 2,5 MHz ermöglichen. Das entwickelte Ultraschallmesssystem arbeitet nach dem Puls Echo-Prinzip und kann eine räumlich segmentierte, ringförmige Anregung erzeugen. Die Bestimmung der frequenzabhängigen Materialparameter geschieht hierbei über ein inverses Verfahren. Die Ergebnisse des Projekts zeigen, dass die Segmentierung der Anregung, die Geometrie der Probe sowie das Puls-Echo-Messprinzip die Messergebnisse sowie die Sensitivität gegenüber Scherparametern wesentlich beeinflussen. Im Rahmen des Projektes wurde auch eine statistische Auswertung des Optimierungsverfahrens hinsichtlich transversal-isotroper Materialsymmetrie mit Rayleigh-Dämpfung durchgeführt. Die Ergebnisse zeigen, dass das entwickelte Verfahren gute Konvergenzeigenschaften aufweist und sich durch verbesserte Robustheit auszeichnet.","lang":"ger"},{"lang":"eng","text":"This research project involved developing a measurement method to determine the acoustic material parameters of polymers within the ultrasonic frequency range. The aim of this method is to extend the range of standardised tests that operate in the quasi-static or low-frequency range. In contrast to existing methods such as the creep test or dynamic mechanical analysis according to [DIN6721], the developed method is capable of non-invasive characterisation of the (visco-)elastic material parameters in the frequency range of 0,75 MHz bis 2,5 MHz. The developed ultrasonic measurement setup utilises the pulse-echo principle and can generate a spatially segmented, ring-shaped excitation. The frequency-dependent material parameters are determined using an inverse method. The final results of the project show that the segmentation of the excitation, the geometry of the specimen and the pulse-echo measurement principle have a significant influence on the measurement results and the sensitivity to shear movements. As part of the project, a statistical evaluation of the optimisation process was also carried out with regard to transversely isotropic material symmetry with Rayleigh damping. The results show that the developed process has good convergence properties and is characterised by improved robustness."}],"report_number":"409779252","type":"report","language":[{"iso":"ger"}],"keyword":["Materialcharakterisierung","Polymer","Inverses Problem","Ultraschall","Optimierung"],"user_id":"32616","department":[{"_id":"49"}],"project":[{"name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89"}],"_id":"65426","citation":{"mla":"Dreiling, Dmitrij, et al. <i>Vollständige Bestimmung der akustischen Materialparameter von Polymeren II</i>. Hannover : Technische Informationsbibliothek, 2026, doi:<a href=\"https://doi.org/10.34657/33602\">https://doi.org/10.34657/33602</a>.","short":"D. Dreiling, D. Itner, C. Birk, H. Gravenkamp, B. Henning, Vollständige Bestimmung der akustischen Materialparameter von Polymeren II, Hannover : Technische Informationsbibliothek, 2026.","bibtex":"@book{Dreiling_Itner_Birk_Gravenkamp_Henning_2026, title={Vollständige Bestimmung der akustischen Materialparameter von Polymeren II}, DOI={<a href=\"https://doi.org/10.34657/33602\">https://doi.org/10.34657/33602</a>}, publisher={Hannover : Technische Informationsbibliothek}, author={Dreiling, Dmitrij and Itner, Dominik and Birk, Carolin and Gravenkamp, Hauke and Henning, Bernd}, year={2026} }","apa":"Dreiling, D., Itner, D., Birk, C., Gravenkamp, H., &#38; Henning, B. (2026). <i>Vollständige Bestimmung der akustischen Materialparameter von Polymeren II</i>. Hannover : Technische Informationsbibliothek. <a href=\"https://doi.org/10.34657/33602\">https://doi.org/10.34657/33602</a>","chicago":"Dreiling, Dmitrij, Dominik Itner, Carolin Birk, Hauke Gravenkamp, and Bernd Henning. <i>Vollständige Bestimmung der akustischen Materialparameter von Polymeren II</i>. Hannover : Technische Informationsbibliothek, 2026. <a href=\"https://doi.org/10.34657/33602\">https://doi.org/10.34657/33602</a>.","ieee":"D. Dreiling, D. Itner, C. Birk, H. Gravenkamp, and B. Henning, <i>Vollständige Bestimmung der akustischen Materialparameter von Polymeren II</i>. Hannover : Technische Informationsbibliothek, 2026.","ama":"Dreiling D, Itner D, Birk C, Gravenkamp H, Henning B. <i>Vollständige Bestimmung der akustischen Materialparameter von Polymeren II</i>. Hannover : Technische Informationsbibliothek; 2026. doi:<a href=\"https://doi.org/10.34657/33602\">https://doi.org/10.34657/33602</a>"},"page":"12","year":"2026","publication_status":"published","main_file_link":[{"open_access":"1","url":"https://oa.tib.eu/renate/handle/123456789/34534"}],"doi":"https://doi.org/10.34657/33602","title":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren II","author":[{"first_name":"Dmitrij","full_name":"Dreiling, Dmitrij","id":"32616","last_name":"Dreiling"},{"first_name":"Dominik","full_name":"Itner, Dominik","last_name":"Itner"},{"full_name":"Birk, Carolin","last_name":"Birk","first_name":"Carolin"},{"first_name":"Hauke","full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp"},{"full_name":"Henning, Bernd","id":"213","last_name":"Henning","first_name":"Bernd"}],"date_created":"2026-04-14T06:43:03Z","date_updated":"2026-04-17T07:18:16Z","publisher":"Hannover : Technische Informationsbibliothek","oa":"1"},{"publication_identifier":{"issn":["0957-0233","1361-6501"]},"publication_status":"published","intvolume":"        36","citation":{"mla":"Dreiling, Dmitrij, et al. “Increasing the Sensitivity of Ultrasonic Transmission Measurements for Elastic Material Parameter Estimation.” <i>Measurement Science and Technology</i>, vol. 36, 6, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>.","short":"D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, B. Henning, Measurement Science and Technology 36 (2025).","bibtex":"@article{Dreiling_Itner_Gravenkamp_Claes_Birk_Henning_2025, title={Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation}, volume={36}, DOI={<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>}, number={6}, journal={Measurement Science and Technology}, publisher={IOP Publishing}, author={Dreiling, Dmitrij and Itner, Dominik and Gravenkamp, Hauke and Claes, Leander and Birk, Carolin and Henning, Bernd}, year={2025} }","apa":"Dreiling, D., Itner, D., Gravenkamp, H., Claes, L., Birk, C., &#38; Henning, B. (2025). Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation. <i>Measurement Science and Technology</i>, <i>36</i>, Article 6. <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">https://doi.org/10.1088/1361-6501/add9b6</a>","ama":"Dreiling D, Itner D, Gravenkamp H, Claes L, Birk C, Henning B. Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation. <i>Measurement Science and Technology</i>. 2025;36. doi:<a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>","chicago":"Dreiling, Dmitrij, Dominik Itner, Hauke Gravenkamp, Leander Claes, Carolin Birk, and Bernd Henning. “Increasing the Sensitivity of Ultrasonic Transmission Measurements for Elastic Material Parameter Estimation.” <i>Measurement Science and Technology</i> 36 (2025). <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">https://doi.org/10.1088/1361-6501/add9b6</a>.","ieee":"D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, and B. Henning, “Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation,” <i>Measurement Science and Technology</i>, vol. 36, Art. no. 6, 2025, doi: <a href=\"https://doi.org/10.1088/1361-6501/add9b6\">10.1088/1361-6501/add9b6</a>."},"oa":"1","date_updated":"2025-05-27T15:03:38Z","volume":36,"author":[{"first_name":"Dmitrij","id":"32616","full_name":"Dreiling, Dmitrij","last_name":"Dreiling"},{"first_name":"Dominik","full_name":"Itner, Dominik","last_name":"Itner"},{"full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp","first_name":"Hauke"},{"first_name":"Leander","id":"11829","full_name":"Claes, Leander","last_name":"Claes","orcid":"0000-0002-4393-268X"},{"last_name":"Birk","full_name":"Birk, Carolin","first_name":"Carolin"},{"first_name":"Bernd","last_name":"Henning","full_name":"Henning, Bernd","id":"213"}],"doi":"10.1088/1361-6501/add9b6","main_file_link":[{"url":"https://iopscience.iop.org/article/10.1088/1361-6501/add9b6","open_access":"1"}],"type":"journal_article","status":"public","_id":"59995","project":[{"grant_number":"409779252","name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89"}],"department":[{"_id":"49"}],"user_id":"32616","article_type":"original","article_number":"6","funded_apc":"1","quality_controlled":"1","year":"2025","publisher":"IOP Publishing","date_created":"2025-05-19T13:30:39Z","title":"Increasing the sensitivity of ultrasonic transmission measurements for elastic material parameter estimation","publication":"Measurement Science and Technology","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>Ultrasonic transmission measurements can be used for material characterization, as the propagation time of sound waves and thus their velocity depends on the elastic material parameters. Measurement results for the elastic material parameters are acquired non-destructively using ultrasonic transmission measurements of hollow cylindrical polymer specimens. To determine the material parameters, an inverse approach is used comparing measurements with simulated data. Previous studies show that the procedure exhibits low sensitivity with respect to the shear parameters of the material. In order to increase the sensitivity, we propose to apply a spatially annular excitation on the base of the specimen. As a measure to analyse the sensitivities with respect to all parameters and their linear independence, we observe the volume of the parallelotope of the sensitivity vectors. Here, a scaled boundary finite element formulation of wave propagation in the specimen is expanded to yield derivative information directly, and a sensitivity analysis can be carried out efficiently. Finally, the results of this sensitivity analysis with regard to the annular excitation are also applied to the measurement setup.</jats:p>"}],"keyword":["Sensitivity analysis","Ultrasonic transducer","Guided waves","Polymers","Gram determinant"],"language":[{"iso":"eng"}]},{"date_created":"2025-11-25T12:23:07Z","author":[{"last_name":"Dreiling","full_name":"Dreiling, Dmitrij","id":"32616","first_name":"Dmitrij"},{"full_name":"Itner, Dominik","last_name":"Itner","first_name":"Dominik"},{"last_name":"Gravenkamp","full_name":"Gravenkamp, Hauke","first_name":"Hauke"},{"first_name":"Carolin","full_name":"Birk, Carolin","last_name":"Birk"},{"last_name":"Henning","id":"213","full_name":"Henning, Bernd","first_name":"Bernd"}],"date_updated":"2025-11-25T12:59:13Z","publisher":"AMA Service GmbH","doi":"10.5162/ultrasonic2025/a12-c5","title":"A Measurement Setup for the Determination of Temperature-Dependent Viscoelastic Material Parameters Using an Ultrasonic Pulse-Echo Technique","page":"102–105","citation":{"ieee":"D. Dreiling, D. Itner, H. Gravenkamp, C. Birk, and B. Henning, “A Measurement Setup for the Determination of Temperature-Dependent Viscoelastic Material Parameters Using an Ultrasonic Pulse-Echo Technique,” in <i>2025 International Congress on Ultrasonics</i>, 2025, pp. 102–105, doi: <a href=\"https://doi.org/10.5162/ultrasonic2025/a12-c5\">10.5162/ultrasonic2025/a12-c5</a>.","chicago":"Dreiling, Dmitrij, Dominik Itner, Hauke Gravenkamp, Carolin Birk, and Bernd Henning. “A Measurement Setup for the Determination of Temperature-Dependent Viscoelastic Material Parameters Using an Ultrasonic Pulse-Echo Technique.” In <i>2025 International Congress on Ultrasonics</i>, 102–105. Paderborn: AMA Service GmbH, 2025. <a href=\"https://doi.org/10.5162/ultrasonic2025/a12-c5\">https://doi.org/10.5162/ultrasonic2025/a12-c5</a>.","ama":"Dreiling D, Itner D, Gravenkamp H, Birk C, Henning B. A Measurement Setup for the Determination of Temperature-Dependent Viscoelastic Material Parameters Using an Ultrasonic Pulse-Echo Technique. In: <i>2025 International Congress on Ultrasonics</i>. AMA Service GmbH; 2025:102–105. doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a12-c5\">10.5162/ultrasonic2025/a12-c5</a>","apa":"Dreiling, D., Itner, D., Gravenkamp, H., Birk, C., &#38; Henning, B. (2025). A Measurement Setup for the Determination of Temperature-Dependent Viscoelastic Material Parameters Using an Ultrasonic Pulse-Echo Technique. <i>2025 International Congress on Ultrasonics</i>, 102–105. <a href=\"https://doi.org/10.5162/ultrasonic2025/a12-c5\">https://doi.org/10.5162/ultrasonic2025/a12-c5</a>","bibtex":"@inproceedings{Dreiling_Itner_Gravenkamp_Birk_Henning_2025, place={Paderborn}, title={A Measurement Setup for the Determination of Temperature-Dependent Viscoelastic Material Parameters Using an Ultrasonic Pulse-Echo Technique}, DOI={<a href=\"https://doi.org/10.5162/ultrasonic2025/a12-c5\">10.5162/ultrasonic2025/a12-c5</a>}, booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service GmbH}, author={Dreiling, Dmitrij and Itner, Dominik and Gravenkamp, Hauke and Birk, Carolin and Henning, Bernd}, year={2025}, pages={102–105} }","mla":"Dreiling, Dmitrij, et al. “A Measurement Setup for the Determination of Temperature-Dependent Viscoelastic Material Parameters Using an Ultrasonic Pulse-Echo Technique.” <i>2025 International Congress on Ultrasonics</i>, AMA Service GmbH, 2025, pp. 102–105, doi:<a href=\"https://doi.org/10.5162/ultrasonic2025/a12-c5\">10.5162/ultrasonic2025/a12-c5</a>.","short":"D. Dreiling, D. Itner, H. Gravenkamp, C. Birk, B. Henning, in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 102–105."},"year":"2025","place":"Paderborn","department":[{"_id":"49"}],"user_id":"32616","_id":"62301","project":[{"_id":"89","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"language":[{"iso":"eng"}],"publication":"2025 International Congress on Ultrasonics","type":"conference","status":"public"},{"funded_apc":"1","_id":"55519","project":[{"_id":"89","name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","grant_number":"409779252"}],"department":[{"_id":"49"}],"user_id":"32616","status":"public","type":"journal_article","conference":{"name":"XXXVIII. Messtechnisches Symposium"},"doi":"10.1515/teme-2024-0045","main_file_link":[{"url":"https://www.degruyter.com/document/doi/10.1515/teme-2024-0045/html"}],"date_updated":"2024-10-31T08:05:10Z","volume":91,"author":[{"full_name":"Dreiling, Dmitrij","id":"32616","last_name":"Dreiling","first_name":"Dmitrij"},{"first_name":"Dominik","last_name":"Itner","full_name":"Itner, Dominik"},{"full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp","first_name":"Hauke"},{"full_name":"Birk, Carolin","last_name":"Birk","first_name":"Carolin"},{"first_name":"Bernd","full_name":"Henning, Bernd","id":"213","last_name":"Henning"}],"intvolume":"        91","page":"26-31","citation":{"ama":"Dreiling D, Itner D, Gravenkamp H, Birk C, Henning B. Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens. <i>tm - Technisches Messen</i>. 2024;91(s1):26-31. doi:<a href=\"https://doi.org/10.1515/teme-2024-0045\">10.1515/teme-2024-0045</a>","ieee":"D. Dreiling, D. Itner, H. Gravenkamp, C. Birk, and B. Henning, “Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens,” <i>tm - Technisches Messen</i>, vol. 91, no. s1, pp. 26–31, 2024, doi: <a href=\"https://doi.org/10.1515/teme-2024-0045\">10.1515/teme-2024-0045</a>.","chicago":"Dreiling, Dmitrij, Dominik Itner, Hauke Gravenkamp, Carolin Birk, and Bernd Henning. “Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens.” <i>tm - Technisches Messen</i> 91, no. s1 (2024): 26–31. <a href=\"https://doi.org/10.1515/teme-2024-0045\">https://doi.org/10.1515/teme-2024-0045</a>.","apa":"Dreiling, D., Itner, D., Gravenkamp, H., Birk, C., &#38; Henning, B. (2024). Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens. <i>tm - Technisches Messen</i>, <i>91</i>(s1), 26–31. <a href=\"https://doi.org/10.1515/teme-2024-0045\">https://doi.org/10.1515/teme-2024-0045</a>","short":"D. Dreiling, D. Itner, H. Gravenkamp, C. Birk, B. Henning, tm - Technisches Messen 91 (2024) 26–31.","mla":"Dreiling, Dmitrij, et al. “Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens.” <i>tm - Technisches Messen</i>, vol. 91, no. s1, De Gruyter, 2024, pp. 26–31, doi:<a href=\"https://doi.org/10.1515/teme-2024-0045\">10.1515/teme-2024-0045</a>.","bibtex":"@article{Dreiling_Itner_Gravenkamp_Birk_Henning_2024, title={Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens}, volume={91}, DOI={<a href=\"https://doi.org/10.1515/teme-2024-0045\">10.1515/teme-2024-0045</a>}, number={s1}, journal={tm - Technisches Messen}, publisher={De Gruyter}, author={Dreiling, Dmitrij and Itner, Dominik and Gravenkamp, Hauke and Birk, Carolin and Henning, Bernd}, year={2024}, pages={26–31} }"},"publication_identifier":{"isbn":["2196-7113"]},"publication_status":"published","keyword":["Materialcharakterisierung","Puls-Echo Methode","inverse Verfahren"],"language":[{"iso":"ger"}],"abstract":[{"lang":"ger","text":"Im Folgenden wird ein wellenleiterbasierter Ansatz zur Bestimmung von viskoelastischen Materialparametern für eine numerische Simulation der Schallausbreitung in transversal isotropen Polymeren vorgestellt. Ein hierfür entwickeltes Puls-Echo-Messverfahren liefert Messsignale, welche anschließend zur Schätzung der Materialparameter von absorbierenden, zylindrischen Polymerproben genutzt werden. Darüber hinaus kommen in dem Messaufbau Schallwandler zum Einsatz, die eine segmentierte ringförmige Anregung der Probe verursachen und die Sensitivität gegenüber Scherbewegungen erhöhen. Mithilfe einer ersten strahlentheoretischen Startwertschätzung werden eine multimodale, semianalytische Simulation der Schallausbreitung im Wellenleiter realisiert und schließlich die Materialparameter im inversen Ansatz geschätzt."}],"publication":"tm - Technisches Messen","title":"Die Bestimmung viskoelastischer Materialparameter von Polymeren mittels eines Puls-Echo-Messverfahrens","publisher":"De Gruyter","date_created":"2024-08-05T11:29:42Z","year":"2024","issue":"s1"},{"year":"2024","title":"A pulse-echo measurement setup to determine viscoelastic material parameters","date_created":"2024-10-31T07:59:01Z","publisher":"IOP Publishing","publication":"2023 International Congress on Ultrasonics, Beijing, China","language":[{"iso":"eng"}],"citation":{"apa":"Dreiling, D., Itner, D., Hetkämper, T., Birk, C., Gravenkamp, H., &#38; Henning, B. (2024). A pulse-echo measurement setup to determine viscoelastic material parameters. <i>2023 International Congress on Ultrasonics, Beijing, China</i>, <i>2822</i>, 012169. <a href=\"https://doi.org/10.1088/1742-6596/2822/1/012169\">https://doi.org/10.1088/1742-6596/2822/1/012169</a>","bibtex":"@inproceedings{Dreiling_Itner_Hetkämper_Birk_Gravenkamp_Henning_2024, title={A pulse-echo measurement setup to determine viscoelastic material parameters}, volume={2822}, DOI={<a href=\"https://doi.org/10.1088/1742-6596/2822/1/012169\">10.1088/1742-6596/2822/1/012169</a>}, booktitle={2023 International Congress on Ultrasonics, Beijing, China}, publisher={IOP Publishing}, author={Dreiling, Dmitrij and Itner, Dominik and Hetkämper, Tim and Birk, Carolin and Gravenkamp, Hauke and Henning, Bernd}, year={2024}, pages={012169} }","mla":"Dreiling, Dmitrij, et al. “A Pulse-Echo Measurement Setup to Determine Viscoelastic Material Parameters.” <i>2023 International Congress on Ultrasonics, Beijing, China</i>, vol. 2822, IOP Publishing, 2024, p. 012169, doi:<a href=\"https://doi.org/10.1088/1742-6596/2822/1/012169\">10.1088/1742-6596/2822/1/012169</a>.","short":"D. Dreiling, D. Itner, T. Hetkämper, C. Birk, H. Gravenkamp, B. Henning, in: 2023 International Congress on Ultrasonics, Beijing, China, IOP Publishing, 2024, p. 012169.","ieee":"D. Dreiling, D. Itner, T. Hetkämper, C. Birk, H. Gravenkamp, and B. Henning, “A pulse-echo measurement setup to determine viscoelastic material parameters,” in <i>2023 International Congress on Ultrasonics, Beijing, China</i>, 2024, vol. 2822, p. 012169, doi: <a href=\"https://doi.org/10.1088/1742-6596/2822/1/012169\">10.1088/1742-6596/2822/1/012169</a>.","chicago":"Dreiling, Dmitrij, Dominik Itner, Tim Hetkämper, Carolin Birk, Hauke Gravenkamp, and Bernd Henning. “A Pulse-Echo Measurement Setup to Determine Viscoelastic Material Parameters.” In <i>2023 International Congress on Ultrasonics, Beijing, China</i>, 2822:012169. IOP Publishing, 2024. <a href=\"https://doi.org/10.1088/1742-6596/2822/1/012169\">https://doi.org/10.1088/1742-6596/2822/1/012169</a>.","ama":"Dreiling D, Itner D, Hetkämper T, Birk C, Gravenkamp H, Henning B. A pulse-echo measurement setup to determine viscoelastic material parameters. In: <i>2023 International Congress on Ultrasonics, Beijing, China</i>. Vol 2822. IOP Publishing; 2024:012169. doi:<a href=\"https://doi.org/10.1088/1742-6596/2822/1/012169\">10.1088/1742-6596/2822/1/012169</a>"},"page":"012169","intvolume":"      2822","publication_identifier":{"issn":["1742-6596"]},"main_file_link":[{"open_access":"1","url":"https://iopscience.iop.org/article/10.1088/1742-6596/2822/1/012169"}],"doi":"10.1088/1742-6596/2822/1/012169","author":[{"first_name":"Dmitrij","id":"32616","full_name":"Dreiling, Dmitrij","last_name":"Dreiling"},{"last_name":"Itner","full_name":"Itner, Dominik","first_name":"Dominik"},{"first_name":"Tim","last_name":"Hetkämper","id":"38123","full_name":"Hetkämper, Tim"},{"last_name":"Birk","full_name":"Birk, Carolin","first_name":"Carolin"},{"full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp","first_name":"Hauke"},{"last_name":"Henning","full_name":"Henning, Bernd","id":"213","first_name":"Bernd"}],"volume":2822,"oa":"1","date_updated":"2024-10-31T08:02:27Z","status":"public","type":"conference","user_id":"11829","department":[{"_id":"49"}],"project":[{"name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89","grant_number":"409779252"}],"_id":"56835"},{"file_date_updated":"2023-05-23T09:26:40Z","_id":"45205","project":[{"grant_number":"409779252","name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89"}],"department":[{"_id":"49"}],"user_id":"32616","series_title":"SMSI - Sensor and Measurement Science International","status":"public","type":"conference","conference":{"location":"Nürnberg","end_date":"2023-05-11","start_date":"2023-05-08","name":"SMSI 2023 - Conference"},"doi":"10.5162/SMSI2023/P59","main_file_link":[{"open_access":"1"}],"date_updated":"2023-05-23T12:02:26Z","oa":"1","author":[{"first_name":"Dmitrij","full_name":"Dreiling, Dmitrij","id":"32616","last_name":"Dreiling"},{"first_name":"Dominik","full_name":"Itner, Dominik","last_name":"Itner"},{"first_name":"Tim","last_name":"Hetkämper","id":"38123","full_name":"Hetkämper, Tim"},{"last_name":"Birk","full_name":"Birk, Carolin","first_name":"Carolin"},{"full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp","first_name":"Hauke"},{"full_name":"Henning, Bernd","id":"213","last_name":"Henning","first_name":"Bernd"}],"place":"Nürnberg","page":"394 - 395","citation":{"apa":"Dreiling, D., Itner, D., Hetkämper, T., Birk, C., Gravenkamp, H., &#38; Henning, B. (2023). Improved determination of viscoelastic material parameters using a pulse-echo measurement setup. <i>SMSI 2023 Conference</i>, 394–395. <a href=\"https://doi.org/10.5162/SMSI2023/P59\">https://doi.org/10.5162/SMSI2023/P59</a>","mla":"Dreiling, Dmitrij, et al. “Improved Determination of Viscoelastic Material Parameters Using a Pulse-Echo Measurement Setup.” <i>SMSI 2023 Conference</i>, AMA Association For Sensors And Measurement, 2023, pp. 394–95, doi:<a href=\"https://doi.org/10.5162/SMSI2023/P59\">10.5162/SMSI2023/P59</a>.","bibtex":"@inproceedings{Dreiling_Itner_Hetkämper_Birk_Gravenkamp_Henning_2023, place={Nürnberg}, series={SMSI - Sensor and Measurement Science International}, title={Improved determination of viscoelastic material parameters using a pulse-echo measurement setup}, DOI={<a href=\"https://doi.org/10.5162/SMSI2023/P59\">10.5162/SMSI2023/P59</a>}, booktitle={SMSI 2023 Conference}, publisher={AMA Association For Sensors And Measurement}, author={Dreiling, Dmitrij and Itner, Dominik and Hetkämper, Tim and Birk, Carolin and Gravenkamp, Hauke and Henning, Bernd}, year={2023}, pages={394–395}, collection={SMSI - Sensor and Measurement Science International} }","short":"D. Dreiling, D. Itner, T. Hetkämper, C. Birk, H. Gravenkamp, B. Henning, in: SMSI 2023 Conference, AMA Association For Sensors And Measurement, Nürnberg, 2023, pp. 394–395.","ieee":"D. Dreiling, D. Itner, T. Hetkämper, C. Birk, H. Gravenkamp, and B. Henning, “Improved determination of viscoelastic material parameters using a pulse-echo measurement setup,” in <i>SMSI 2023 Conference</i>, Nürnberg, 2023, pp. 394–395, doi: <a href=\"https://doi.org/10.5162/SMSI2023/P59\">10.5162/SMSI2023/P59</a>.","chicago":"Dreiling, Dmitrij, Dominik Itner, Tim Hetkämper, Carolin Birk, Hauke Gravenkamp, and Bernd Henning. “Improved Determination of Viscoelastic Material Parameters Using a Pulse-Echo Measurement Setup.” In <i>SMSI 2023 Conference</i>, 394–95. SMSI - Sensor and Measurement Science International. Nürnberg: AMA Association For Sensors And Measurement, 2023. <a href=\"https://doi.org/10.5162/SMSI2023/P59\">https://doi.org/10.5162/SMSI2023/P59</a>.","ama":"Dreiling D, Itner D, Hetkämper T, Birk C, Gravenkamp H, Henning B. Improved determination of viscoelastic material parameters using a pulse-echo measurement setup. In: <i>SMSI 2023 Conference</i>. SMSI - Sensor and Measurement Science International. AMA Association For Sensors And Measurement; 2023:394-395. doi:<a href=\"https://doi.org/10.5162/SMSI2023/P59\">10.5162/SMSI2023/P59</a>"},"has_accepted_license":"1","publication_identifier":{"isbn":["978-3-9819376-8-8"]},"publication_status":"published","ddc":["620"],"language":[{"iso":"eng"}],"file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":686417,"file_name":"P59.pdf","access_level":"closed","file_id":"45207","date_updated":"2023-05-23T09:26:40Z","date_created":"2023-05-23T09:26:40Z","creator":"dmitrij"}],"publication":"SMSI 2023 Conference","title":"Improved determination of viscoelastic material parameters using a pulse-echo measurement setup","publisher":"AMA Association For Sensors And Measurement","date_created":"2023-05-23T09:31:28Z","year":"2023"},{"year":"2022","place":"WCCM, Yokohama","citation":{"mla":"Itner, Dominik, et al. <i>Differentiation of an SBFE Model in the Context of Material Parameter Determination</i>. International Association for Computational Mechanics (IACM), 2022.","short":"D. Itner, H. Gravenkamp, D. Dreiling, C. Birk, B. Henning, Differentiation of an SBFE Model in the Context of Material Parameter Determination, International Association for Computational Mechanics (IACM), WCCM, Yokohama, 2022.","bibtex":"@book{Itner_Gravenkamp_Dreiling_Birk_Henning_2022, place={WCCM, Yokohama}, title={Differentiation of an SBFE model in the context of material parameter determination}, publisher={International Association for Computational Mechanics (IACM)}, author={Itner, Dominik and Gravenkamp, Hauke and Dreiling, Dmitrij and Birk, Carolin and Henning, Bernd}, year={2022} }","apa":"Itner, D., Gravenkamp, H., Dreiling, D., Birk, C., &#38; Henning, B. (2022). <i>Differentiation of an SBFE model in the context of material parameter determination</i>. International Association for Computational Mechanics (IACM).","ama":"Itner D, Gravenkamp H, Dreiling D, Birk C, Henning B. <i>Differentiation of an SBFE Model in the Context of Material Parameter Determination</i>. International Association for Computational Mechanics (IACM); 2022.","chicago":"Itner, Dominik, Hauke Gravenkamp, Dmitrij Dreiling, Carolin Birk, and Bernd Henning. <i>Differentiation of an SBFE Model in the Context of Material Parameter Determination</i>. WCCM, Yokohama: International Association for Computational Mechanics (IACM), 2022.","ieee":"D. Itner, H. Gravenkamp, D. Dreiling, C. Birk, and B. Henning, <i>Differentiation of an SBFE model in the context of material parameter determination</i>. WCCM, Yokohama: International Association for Computational Mechanics (IACM), 2022."},"date_updated":"2022-10-25T13:22:59Z","publisher":"International Association for Computational Mechanics (IACM)","date_created":"2020-06-12T13:52:03Z","author":[{"full_name":"Itner, Dominik","last_name":"Itner","first_name":"Dominik"},{"full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp","first_name":"Hauke"},{"first_name":"Dmitrij","last_name":"Dreiling","id":"32616","full_name":"Dreiling, Dmitrij"},{"last_name":"Birk","full_name":"Birk, Carolin","first_name":"Carolin"},{"first_name":"Bernd","last_name":"Henning","id":"213","full_name":"Henning, Bernd"}],"title":"Differentiation of an SBFE model in the context of material parameter determination","type":"misc","status":"public","project":[{"grant_number":"409779252","name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89"}],"_id":"17090","user_id":"32616","department":[{"_id":"49"}],"language":[{"iso":"eng"}]},{"language":[{"iso":"eng"}],"project":[{"_id":"89","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","grant_number":"409779252"}],"_id":"21082","user_id":"23082","department":[{"_id":"49"}],"status":"public","type":"journal_article","publication":"PAMM","title":"Simulation of guided waves in cylinders subject to arbitrary boundary conditions for applications in material characterization","doi":"10.1002/pamm.202000232","date_updated":"2022-01-06T06:54:44Z","author":[{"first_name":"Dominik","full_name":"Itner, Dominik","last_name":"Itner"},{"first_name":"Hauke","last_name":"Gravenkamp","full_name":"Gravenkamp, Hauke"},{"id":"32616","full_name":"Dreiling, Dmitrij","last_name":"Dreiling","first_name":"Dmitrij"},{"first_name":"Nadine","last_name":"Feldmann","id":"23082","full_name":"Feldmann, Nadine"},{"id":"213","full_name":"Henning, Bernd","last_name":"Henning","first_name":"Bernd"}],"date_created":"2021-01-26T13:52:47Z","year":"2021","citation":{"chicago":"Itner, Dominik, Hauke Gravenkamp, Dmitrij Dreiling, Nadine Feldmann, and Bernd Henning. “Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions for Applications in Material Characterization.” <i>PAMM</i>, 2021. <a href=\"https://doi.org/10.1002/pamm.202000232\">https://doi.org/10.1002/pamm.202000232</a>.","ieee":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, and B. Henning, “Simulation of guided waves in cylinders subject to arbitrary boundary conditions for applications in material characterization,” <i>PAMM</i>, 2021.","ama":"Itner D, Gravenkamp H, Dreiling D, Feldmann N, Henning B. Simulation of guided waves in cylinders subject to arbitrary boundary conditions for applications in material characterization. <i>PAMM</i>. 2021. doi:<a href=\"https://doi.org/10.1002/pamm.202000232\">10.1002/pamm.202000232</a>","mla":"Itner, Dominik, et al. “Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions for Applications in Material Characterization.” <i>PAMM</i>, 2021, doi:<a href=\"https://doi.org/10.1002/pamm.202000232\">10.1002/pamm.202000232</a>.","short":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, B. Henning, PAMM (2021).","bibtex":"@article{Itner_Gravenkamp_Dreiling_Feldmann_Henning_2021, title={Simulation of guided waves in cylinders subject to arbitrary boundary conditions for applications in material characterization}, DOI={<a href=\"https://doi.org/10.1002/pamm.202000232\">10.1002/pamm.202000232</a>}, journal={PAMM}, author={Itner, Dominik and Gravenkamp, Hauke and Dreiling, Dmitrij and Feldmann, Nadine and Henning, Bernd}, year={2021} }","apa":"Itner, D., Gravenkamp, H., Dreiling, D., Feldmann, N., &#38; Henning, B. (2021). Simulation of guided waves in cylinders subject to arbitrary boundary conditions for applications in material characterization. <i>PAMM</i>. <a href=\"https://doi.org/10.1002/pamm.202000232\">https://doi.org/10.1002/pamm.202000232</a>"},"publication_status":"published","publication_identifier":{"issn":["1617-7061","1617-7061"]}},{"type":"misc","status":"public","project":[{"grant_number":"409779252","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89"}],"_id":"21564","user_id":"11829","department":[{"_id":"49"}],"language":[{"iso":"eng"}],"place":"GAMM Annual Meeting, Kassel","year":"2021","citation":{"mla":"Itner, Dominik, et al. <i>On the Forward Simulation and Cost Functions for the Ultrasonic Material Characterization of Polymers </i>. 2021.","short":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, B. Henning, On the Forward Simulation and Cost Functions for the Ultrasonic Material Characterization of Polymers , GAMM Annual Meeting, Kassel, 2021.","bibtex":"@book{Itner_Gravenkamp_Dreiling_Feldmann_Henning_2021, place={GAMM Annual Meeting, Kassel}, title={On the forward simulation and cost functions for the ultrasonic material characterization of polymers }, author={Itner, Dominik and Gravenkamp, Hauke and Dreiling, Dmitrij and Feldmann, Nadine and Henning, Bernd}, year={2021} }","apa":"Itner, D., Gravenkamp, H., Dreiling, D., Feldmann, N., &#38; Henning, B. (2021). <i>On the forward simulation and cost functions for the ultrasonic material characterization of polymers </i>. GAMM Annual Meeting, Kassel.","ieee":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, and B. Henning, <i>On the forward simulation and cost functions for the ultrasonic material characterization of polymers </i>. GAMM Annual Meeting, Kassel, 2021.","chicago":"Itner, Dominik, Hauke Gravenkamp, Dmitrij Dreiling, Nadine Feldmann, and Bernd Henning. <i>On the Forward Simulation and Cost Functions for the Ultrasonic Material Characterization of Polymers </i>. GAMM Annual Meeting, Kassel, 2021.","ama":"Itner D, Gravenkamp H, Dreiling D, Feldmann N, Henning B. <i>On the Forward Simulation and Cost Functions for the Ultrasonic Material Characterization of Polymers </i>. GAMM Annual Meeting, Kassel; 2021."},"date_updated":"2022-01-06T06:55:06Z","author":[{"first_name":"Dominik","last_name":"Itner","full_name":"Itner, Dominik"},{"last_name":"Gravenkamp","full_name":"Gravenkamp, Hauke","first_name":"Hauke"},{"first_name":"Dmitrij","full_name":"Dreiling, Dmitrij","id":"32616","last_name":"Dreiling"},{"first_name":"Nadine","last_name":"Feldmann","full_name":"Feldmann, Nadine","id":"23082"},{"last_name":"Henning","full_name":"Henning, Bernd","id":"213","first_name":"Bernd"}],"date_created":"2021-03-24T13:37:38Z","title":"On the forward simulation and cost functions for the ultrasonic material characterization of polymers "},{"publication_status":"published","has_accepted_license":"1","citation":{"mla":"Hetkämper, Tim, et al. “Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik.” <i>Fortschritte der Akustik - DAGA 2021</i>, 2021.","bibtex":"@inproceedings{Hetkämper_Dreiling_Claes_Henning_2021, title={Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik}, booktitle={Fortschritte der Akustik - DAGA 2021}, author={Hetkämper, Tim and Dreiling, Dmitrij and Claes, Leander and Henning, Bernd}, year={2021} }","short":"T. Hetkämper, D. Dreiling, L. Claes, B. Henning, in: Fortschritte der Akustik - DAGA 2021, 2021.","apa":"Hetkämper, T., Dreiling, D., Claes, L., &#38; Henning, B. (2021). Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik. <i>Fortschritte der Akustik - DAGA 2021</i>. DAGA 2021 - 47. Jahrestagung für Akustik.","chicago":"Hetkämper, Tim, Dmitrij Dreiling, Leander Claes, and Bernd Henning. “Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik.” In <i>Fortschritte der Akustik - DAGA 2021</i>, 2021.","ieee":"T. Hetkämper, D. Dreiling, L. Claes, and B. Henning, “Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik,” presented at the DAGA 2021 - 47. Jahrestagung für Akustik, 2021.","ama":"Hetkämper T, Dreiling D, Claes L, Henning B. Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik. In: <i>Fortschritte der Akustik - DAGA 2021</i>. ; 2021."},"year":"2021","author":[{"id":"38123","full_name":"Hetkämper, Tim","last_name":"Hetkämper","first_name":"Tim"},{"first_name":"Dmitrij","last_name":"Dreiling","id":"32616","full_name":"Dreiling, Dmitrij"},{"first_name":"Leander","orcid":"0000-0002-4393-268X","last_name":"Claes","id":"11829","full_name":"Claes, Leander"},{"id":"213","full_name":"Henning, Bernd","last_name":"Henning","first_name":"Bernd"}],"date_created":"2021-10-08T08:08:17Z","oa":"1","date_updated":"2022-05-12T15:29:26Z","conference":{"name":"DAGA 2021 - 47. Jahrestagung für Akustik"},"title":"Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik","type":"conference","publication":"Fortschritte der Akustik - DAGA 2021","file":[{"date_updated":"2022-05-12T15:28:52Z","date_created":"2022-05-12T15:28:52Z","creator":"timh1","file_size":870692,"file_id":"31240","file_name":"Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik.pdf","access_level":"open_access","content_type":"application/pdf","relation":"main_file"}],"status":"public","user_id":"38123","department":[{"_id":"49"}],"_id":"25880","language":[{"iso":"ger"}],"file_date_updated":"2022-05-12T15:28:52Z","ddc":["620"]},{"publisher":"Deutsche Gesellschaft für Akustik e.V. (DEGA)","date_created":"2021-10-04T07:54:10Z","title":"Application and modelling of ultrasonic transducers using 1-3 piezoelectric composites with structured electrodes","year":"2021","ddc":["620"],"language":[{"iso":"eng"}],"publication":"Fortschritte der Akustik - DAGA 2021","abstract":[{"lang":"eng","text":"Waveguide-based methods can be used for the non-destructive determination of acoustic material parameters. One of these methods is based on transmission measurements of cylindrical polymeric specimens. Here, the experimental setup consists of two transducers, which excite and receive the waveguide modes at the faces of the cylinder. The measurement, as well as a forward model, are used to determine material parameters of the polymeric specimen in an inverse approach.\r\n1-3 piezoelectric composites are used as an active element because they can be approximated by a thickness vibration only. This allows an easy identification of Mason model parameters to characterise the transducers’ vibration behaviour. \r\nHowever, sensitivity analysis shows a high uncertainty in the determination of the mechanical shear parameters due to the uniform excitation. To increase the sensitivity to these shear motions, arbitrary excitations were investigated by means of numerical simulation. \r\nIn order to be able to realise the determined optimal excitation, new transducer prototypes were designed. By subdividing the electrodes of the active element, for example, ring-shaped excitation is feasible. Furthermore, it can be shown that modelling these transducers with a one-dimensional Mason model is sufficient."}],"file":[{"date_updated":"2021-10-04T07:49:28Z","date_created":"2021-10-04T07:49:28Z","creator":"dmitrij","file_size":906618,"access_level":"closed","file_name":"daga","file_id":"25268","content_type":"application/octet-stream","success":1,"relation":"main_file"}],"date_updated":"2022-09-05T12:54:31Z","author":[{"last_name":"Dreiling","id":"32616","full_name":"Dreiling, Dmitrij","first_name":"Dmitrij"},{"first_name":"Dominik","full_name":"Itner, Dominik","last_name":"Itner"},{"last_name":"Feldmann","full_name":"Feldmann, Nadine","id":"23082","first_name":"Nadine"},{"last_name":"Scheidemann","full_name":"Scheidemann, Claus","id":"38259","first_name":"Claus"},{"first_name":"Hauke","full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp"},{"first_name":"Bernd","id":"213","full_name":"Henning, Bernd","last_name":"Henning"}],"conference":{"location":"Wien","end_date":"2021-08-18","start_date":"2021-08-15","name":"DAGA 2021 - 47. 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