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Henning, in: МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ В ЕСТЕСТВЕННЫХ НАУКАХ - XXX Всероссийская Школа-Конференция, Perm, 2021.","bibtex":"@inproceedings{Lugovtsova_Zeipert_Johannesmann_Nicolai_Prager_Henning_2021, place={Perm}, title={К ОПРЕДЕЛЕНИЮ ПРОЧНОСТИ КЛЕЕВОГО СОЕДИНЕНИЯ В МНОГОСЛОЙНЫХ МАТЕРИАЛАХ ПУТЕМ ИССЛЕДОВАНИЯ ОБЛАСТЕЙ РАСТАЛКИВАНИЯ БЕГУЩИХ УПРУГИХ ВОЛН}, booktitle={МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ В ЕСТЕСТВЕННЫХ НАУКАХ - XXX Всероссийская школа-конференция}, author={Lugovtsova, Yevgeniya and Zeipert, Henning and Johannesmann, Sarah and Nicolai, Marcel and Prager, Jens and Henning, Bernd}, year={2021} }","mla":"Lugovtsova, Yevgeniya, et al. “К ОПРЕДЕЛЕНИЮ ПРОЧНОСТИ КЛЕЕВОГО СОЕДИНЕНИЯ В МНОГОСЛОЙНЫХ МАТЕРИАЛАХ ПУТЕМ ИССЛЕДОВАНИЯ ОБЛАСТЕЙ РАСТАЛКИВАНИЯ БЕГУЩИХ УПРУГИХ ВОЛН.” <i>МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ В ЕСТЕСТВЕННЫХ НАУКАХ - XXX Всероссийская Школа-Конференция</i>, 2021.","ama":"Lugovtsova Y, Zeipert H, Johannesmann S, Nicolai M, Prager J, Henning B. К ОПРЕДЕЛЕНИЮ ПРОЧНОСТИ КЛЕЕВОГО СОЕДИНЕНИЯ В МНОГОСЛОЙНЫХ МАТЕРИАЛАХ ПУТЕМ ИССЛЕДОВАНИЯ ОБЛАСТЕЙ РАСТАЛКИВАНИЯ БЕГУЩИХ УПРУГИХ ВОЛН. In: <i>МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ В ЕСТЕСТВЕННЫХ НАУКАХ - XXX Всероссийская Школа-Конференция</i>. ; 2021.","chicago":"Lugovtsova, Yevgeniya, Henning Zeipert, Sarah Johannesmann, Marcel Nicolai, Jens Prager, and Bernd Henning. “К ОПРЕДЕЛЕНИЮ ПРОЧНОСТИ КЛЕЕВОГО СОЕДИНЕНИЯ В МНОГОСЛОЙНЫХ МАТЕРИАЛАХ ПУТЕМ ИССЛЕДОВАНИЯ ОБЛАСТЕЙ РАСТАЛКИВАНИЯ БЕГУЩИХ УПРУГИХ ВОЛН.” In <i>МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ В ЕСТЕСТВЕННЫХ НАУКАХ - XXX Всероссийская Школа-Конференция</i>. Perm, 2021.","ieee":"Y. Lugovtsova, H. Zeipert, S. Johannesmann, M. Nicolai, J. Prager, and B. 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(2021). Investigating peculiarities of piezoelectric detection methods for acoustic plate waves in material characterisation applications. <i>Tm - Technisches Messen</i>, <i>88</i>(3), 147–155. <a href=\"https://doi.org/10.1515/teme-2020-0098\">https://doi.org/10.1515/teme-2020-0098</a>","mla":"Claes, Leander, et al. “Investigating Peculiarities of Piezoelectric Detection Methods for Acoustic Plate Waves in Material Characterisation Applications.” <i>Tm - Technisches Messen</i>, vol. 88, no. 3, 2021, pp. 147–55, doi:<a href=\"https://doi.org/10.1515/teme-2020-0098\">10.1515/teme-2020-0098</a>.","bibtex":"@article{Claes_Schmiegel_Grünsteidl_Johannesmann_Webersen_Henning_2021, title={Investigating peculiarities of piezoelectric detection methods for acoustic plate waves in material characterisation applications}, volume={88}, DOI={<a href=\"https://doi.org/10.1515/teme-2020-0098\">10.1515/teme-2020-0098</a>}, number={3}, journal={tm - Technisches Messen}, author={Claes, Leander and Schmiegel, Hanna and Grünsteidl, Clemens and Johannesmann, Sarah and Webersen, Manuel and Henning, Bernd}, year={2021}, pages={147–155} }","short":"L. Claes, H. Schmiegel, C. Grünsteidl, S. Johannesmann, M. Webersen, B. Henning, Tm - Technisches Messen 88 (2021) 147–155.","ieee":"L. Claes, H. Schmiegel, C. Grünsteidl, S. Johannesmann, M. Webersen, and B. Henning, “Investigating peculiarities of piezoelectric detection methods for acoustic plate waves in material characterisation applications,” <i>tm - Technisches Messen</i>, vol. 88, no. 3, pp. 147–155, 2021.","chicago":"Claes, Leander, Hanna Schmiegel, Clemens Grünsteidl, Sarah Johannesmann, Manuel Webersen, and Bernd Henning. “Investigating Peculiarities of Piezoelectric Detection Methods for Acoustic Plate Waves in Material Characterisation Applications.” <i>Tm - Technisches Messen</i> 88, no. 3 (2021): 147–55. <a href=\"https://doi.org/10.1515/teme-2020-0098\">https://doi.org/10.1515/teme-2020-0098</a>.","ama":"Claes L, Schmiegel H, Grünsteidl C, Johannesmann S, Webersen M, Henning B. Investigating peculiarities of piezoelectric detection methods for acoustic plate waves in material characterisation applications. <i>tm - Technisches Messen</i>. 2021;88(3):147-155. doi:<a href=\"https://doi.org/10.1515/teme-2020-0098\">10.1515/teme-2020-0098</a>"},"_id":"21067","project":[{"_id":"105","name":"Vermiedene Kreuzungen von Lamb-Wellenmoden in mehrlagigen Strukturen","grant_number":"449607253"}],"department":[{"_id":"49"}],"user_id":"11829","language":[{"iso":"eng"}],"alternative_title":["Untersuchung von Eigenheiten piezoelektrischer Detektionsmethoden für akustische Plattenwellen zur Materialcharakterisierung"],"publication":"tm - Technisches Messen","type":"journal_article","abstract":[{"text":"Acoustic waves in plates have proven a viable tool for testing and material characterisation purposes. There are a multitude of options for excitation and detection of theses waves, such as optical and piezoelectric systems. While optical systems, with thermoelastic excitation and interferometric detection, have the benefit of being contactless, they usually require rather complex and expensive experimental setups. Piezoelectric systems are more easily realised but require direct contact with the specimen and usually have a limited bandwidth, especially in case of piezoelectric excitation. In this work, the authors compare the properties of piezoelectric and optical detection methods for broad-band acoustic signals. The shape (e. g. the displacement) of a propagating plate wave is given by its frequency and wave number, allowing to investigate correlations between mode shapes and received signal strengths. This is aided by evaluations in normalised frequency and wavenumber space, facilitating comparisons of different specimens. Further, the authors explore possibilities to utilise the specific properties of the detection methods to determine acoustic material parameters.","lang":"eng"}],"status":"public"},{"status":"public","type":"journal_article","publication":"PAMM","language":[{"iso":"eng"}],"user_id":"23082","department":[{"_id":"49"}],"project":[{"name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89","grant_number":"409779252"}],"_id":"21082","citation":{"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>.","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} }","short":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, B. Henning, PAMM (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>","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.","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>.","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>"},"year":"2021","publication_status":"published","publication_identifier":{"issn":["1617-7061","1617-7061"]},"doi":"10.1002/pamm.202000232","title":"Simulation of guided waves in cylinders subject to arbitrary boundary conditions for applications in material characterization","date_created":"2021-01-26T13:52:47Z","author":[{"first_name":"Dominik","full_name":"Itner, Dominik","last_name":"Itner"},{"first_name":"Hauke","full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp"},{"full_name":"Dreiling, Dmitrij","id":"32616","last_name":"Dreiling","first_name":"Dmitrij"},{"id":"23082","full_name":"Feldmann, Nadine","last_name":"Feldmann","first_name":"Nadine"},{"id":"213","full_name":"Henning, Bernd","last_name":"Henning","first_name":"Bernd"}],"date_updated":"2022-01-06T06:54:44Z"},{"doi":"10.17619/UNIPB/1-1088","title":"Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall","date_created":"2021-02-05T11:47:28Z","author":[{"first_name":"Manuel","last_name":"Webersen","orcid":"0000-0001-6411-4232","id":"11289","full_name":"Webersen, Manuel"}],"date_updated":"2022-01-06T06:54:49Z","publisher":"Universitätsbibliothek Paderborn","citation":{"ama":"Webersen M. <i>Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall</i>. Universitätsbibliothek Paderborn; 2021. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1088\">10.17619/UNIPB/1-1088</a>","ieee":"M. Webersen, <i>Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall</i>. Universitätsbibliothek Paderborn, 2021.","chicago":"Webersen, Manuel. <i>Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall</i>. Universitätsbibliothek Paderborn, 2021. <a href=\"https://doi.org/10.17619/UNIPB/1-1088\">https://doi.org/10.17619/UNIPB/1-1088</a>.","bibtex":"@book{Webersen_2021, title={Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-1088\">10.17619/UNIPB/1-1088</a>}, publisher={Universitätsbibliothek Paderborn}, author={Webersen, Manuel}, year={2021} }","mla":"Webersen, Manuel. <i>Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall</i>. Universitätsbibliothek Paderborn, 2021, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1088\">10.17619/UNIPB/1-1088</a>.","short":"M. Webersen, Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall, Universitätsbibliothek Paderborn, 2021.","apa":"Webersen, M. (2021). <i>Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall</i>. Universitätsbibliothek Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-1088\">https://doi.org/10.17619/UNIPB/1-1088</a>"},"year":"2021","publication_status":"published","language":[{"iso":"ger"}],"department":[{"_id":"49"}],"user_id":"11289","_id":"21183","status":"public","abstract":[{"text":"Die präzise Kenntnis der Eigenschaften verwendeter Materialien hat große Bedeutung für den Entwurf technischer Systeme aller Art, aber auch für die Überwachung solcher Systeme im Betrieb. Für verschiedene physikalische Eigenschaften, Betriebsbedingungen und Materialklassen werden daher geeignete messtechnische Verfahren zur Materialcharakterisierung benötigt. In der vorliegenden Arbeit wird ein Verfahren zur ultraschallbasierten Charakterisierung der mechanischen Eigenschaften von homogenen und faserverstärkten thermoplastischen Polymeren unter Berücksichtigung der Richtungsabhängigkeit vorgestellt. Plattenförmige Probekörper werden dazu mittels Laser-Pulsen hoher Energie breitbandig angeregt und die resultierenden akustischen Lamb-Wellen aufgezeichnet. Auf Basis der dispersiven Eigenschaften der detektierten Wellenleitermoden werden in einem inversen Verfahren die Parameter eines linear-elastischen Materialmodells identifiziert. Darüber hinaus wird ein Verfahren zur vollständigen Charakterisierung der Richtungsabhängigkeit in orthotropen Materialien wie Faserverbundwerkstoffen unter Verwendung eines zweidimensionalen Simulationsmodells vorgestellt. Das Messverfahren wird anhand einer Untersuchungsreihe an künstlich gealterten Polymer- und Faserverbundwerkstoffen verifiziert und die Übertragbarkeit der Ergebnisse auf den quasistatischen Fall betrachtet. Im Vergleich mit den Ergebnissen mechanischer Zugversuche werden die Voraussetzungen und Einschränkungen, insbesondere durch die Annahme eines ideal-elastischen Materialmodells, diskutiert.","lang":"ger"},{"lang":"eng","text":"Precise knowledge of material properties is a great concern in the design of technical systems, and in the monitoring of such systems during operation. Therefore, metrological processes are required for materials characterisation with respect to specific physical properties, operational conditions and classes of materials. In the work presented herein, a measurement procedure for the ultrasonic characterization of mechanical properties of homogeneous and fiber-reinforced thermoplastic polymer materials is presented, considering the different degrees of anisotropy. For this, acoustic Lamb waves are excited in a plate-shaped specimen using high-energy laser pulses, and then recorded.Based on the dispersive characteristics of the detected waveguide modes, an inverse procedure is applied to identify the parameters of a linear-elastic material model. Further, a procedure for completely characterising the orthotropy of materials like fiber-reinforced composites using a two-dimensional simulation model is presented. The measurement procedure is verified by examining artificially aged homogeneous polymers and composites, also considering the applicability of results to the quasistatic case. Comparing to the results of corresponding mechanical tensile tests, preconditions and limitations of the procedure are discussed, specifically regarding the assumption of an ideal-elastic material model."}],"type":"dissertation"},{"language":[{"iso":"eng"}],"user_id":"11829","department":[{"_id":"49"}],"project":[{"grant_number":"409779252","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89"}],"_id":"21564","status":"public","type":"misc","title":"On the forward simulation and cost functions for the ultrasonic material characterization of polymers ","date_created":"2021-03-24T13:37:38Z","author":[{"full_name":"Itner, Dominik","last_name":"Itner","first_name":"Dominik"},{"last_name":"Gravenkamp","full_name":"Gravenkamp, Hauke","first_name":"Hauke"},{"first_name":"Dmitrij","id":"32616","full_name":"Dreiling, Dmitrij","last_name":"Dreiling"},{"first_name":"Nadine","last_name":"Feldmann","id":"23082","full_name":"Feldmann, Nadine"},{"first_name":"Bernd","last_name":"Henning","id":"213","full_name":"Henning, Bernd"}],"date_updated":"2022-01-06T06:55:06Z","citation":{"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.","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} }","mla":"Itner, Dominik, et al. <i>On the Forward Simulation and Cost Functions for the Ultrasonic Material Characterization of Polymers </i>. 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.","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.","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."},"place":"GAMM Annual Meeting, Kassel","year":"2021"},{"title":"Lamb wave based approach to the determination of elastic and viscoelastic material parameters","doi":"10.1515/teme-2021-0070","publisher":"Walter de Gruyter {GmbH}","date_updated":"2022-01-06T06:56:00Z","date_created":"2021-09-06T11:07:18Z","author":[{"last_name":"Johannesmann","id":"29190","full_name":"Johannesmann, Sarah","first_name":"Sarah"},{"first_name":"Leander","id":"11829","full_name":"Claes, Leander","orcid":"0000-0002-4393-268X","last_name":"Claes"},{"last_name":"Henning","full_name":"Henning, Bernd","id":"213","first_name":"Bernd"}],"volume":88,"year":"2021","citation":{"ieee":"S. Johannesmann, L. Claes, and B. Henning, “Lamb wave based approach to the determination of elastic and viscoelastic material parameters,” <i>tm - Technisches Messen</i>, vol. 88, no. s1, pp. s28–s33, 2021.","chicago":"Johannesmann, Sarah, Leander Claes, and Bernd Henning. “Lamb Wave Based Approach to the Determination of Elastic and Viscoelastic Material Parameters.” <i>Tm - Technisches Messen</i> 88, no. s1 (2021): s28–33. <a href=\"https://doi.org/10.1515/teme-2021-0070\">https://doi.org/10.1515/teme-2021-0070</a>.","ama":"Johannesmann S, Claes L, Henning B. Lamb wave based approach to the determination of elastic and viscoelastic material parameters. <i>tm - Technisches Messen</i>. 2021;88(s1):s28-s33. doi:<a href=\"https://doi.org/10.1515/teme-2021-0070\">10.1515/teme-2021-0070</a>","apa":"Johannesmann, S., Claes, L., &#38; Henning, B. (2021). Lamb wave based approach to the determination of elastic and viscoelastic material parameters. <i>Tm - Technisches Messen</i>, <i>88</i>(s1), s28–s33. <a href=\"https://doi.org/10.1515/teme-2021-0070\">https://doi.org/10.1515/teme-2021-0070</a>","short":"S. Johannesmann, L. Claes, B. Henning, Tm - Technisches Messen 88 (2021) s28–s33.","mla":"Johannesmann, Sarah, et al. “Lamb Wave Based Approach to the Determination of Elastic and Viscoelastic Material Parameters.” <i>Tm - Technisches Messen</i>, vol. 88, no. s1, Walter de Gruyter {GmbH}, 2021, pp. s28–33, doi:<a href=\"https://doi.org/10.1515/teme-2021-0070\">10.1515/teme-2021-0070</a>.","bibtex":"@article{Johannesmann_Claes_Henning_2021, title={Lamb wave based approach to the determination of elastic and viscoelastic material parameters}, volume={88}, DOI={<a href=\"https://doi.org/10.1515/teme-2021-0070\">10.1515/teme-2021-0070</a>}, number={s1}, journal={tm - Technisches Messen}, publisher={Walter de Gruyter {GmbH}}, author={Johannesmann, Sarah and Claes, Leander and Henning, Bernd}, year={2021}, pages={s28–s33} }"},"page":"s28-s33","intvolume":"        88","issue":"s1","language":[{"iso":"eng"}],"_id":"23791","user_id":"11829","department":[{"_id":"49"}],"status":"public","type":"journal_article","publication":"tm - Technisches Messen"},{"year":"2021","page":"91 - 92","citation":{"apa":"Zeipert, H., Claes, L., Johannesmann, S., Webersen, M., Lugovtsova, Y., Prager, J., &#38; Henning, B. (2021). Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer Systems (pp. 91–92). Presented at the Sensor and Measurement Science International, Nürnberg. <a href=\"https://doi.org/10.5162/SMSI2021/A8.2\">https://doi.org/10.5162/SMSI2021/A8.2</a>","short":"H. Zeipert, L. Claes, S. Johannesmann, M. Webersen, Y. Lugovtsova, J. Prager, B. Henning, in: 2021, pp. 91–92.","bibtex":"@inproceedings{Zeipert_Claes_Johannesmann_Webersen_Lugovtsova_Prager_Henning_2021, title={Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer Systems}, DOI={<a href=\"https://doi.org/10.5162/SMSI2021/A8.2\">10.5162/SMSI2021/A8.2</a>}, author={Zeipert, Henning and Claes, Leander and Johannesmann, Sarah and Webersen, Manuel and Lugovtsova, Yevgeniya and Prager, Jens and Henning, Bernd}, year={2021}, pages={91–92} }","mla":"Zeipert, Henning, et al. <i>Measurement and Simulation of Lamb Waves in Adhesive-Bonded Multilayer Systems</i>. 2021, pp. 91–92, doi:<a href=\"https://doi.org/10.5162/SMSI2021/A8.2\">10.5162/SMSI2021/A8.2</a>.","chicago":"Zeipert, Henning, Leander Claes, Sarah Johannesmann, Manuel Webersen, Yevgeniya Lugovtsova, Jens Prager, and Bernd Henning. “Measurement and Simulation of Lamb Waves in Adhesive-Bonded Multilayer Systems,” 91–92, 2021. <a href=\"https://doi.org/10.5162/SMSI2021/A8.2\">https://doi.org/10.5162/SMSI2021/A8.2</a>.","ieee":"H. Zeipert <i>et al.</i>, “Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer Systems,” presented at the Sensor and Measurement Science International, Nürnberg, 2021, pp. 91–92.","ama":"Zeipert H, Claes L, Johannesmann S, et al. Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer Systems. In: ; 2021:91-92. doi:<a href=\"https://doi.org/10.5162/SMSI2021/A8.2\">10.5162/SMSI2021/A8.2</a>"},"date_updated":"2022-01-06T06:55:22Z","author":[{"last_name":"Zeipert","id":"32580","full_name":"Zeipert, Henning","first_name":"Henning"},{"first_name":"Leander","full_name":"Claes, Leander","id":"11829","last_name":"Claes","orcid":"0000-0002-4393-268X"},{"last_name":"Johannesmann","full_name":"Johannesmann, Sarah","id":"29190","first_name":"Sarah"},{"last_name":"Webersen","orcid":"0000-0001-6411-4232","id":"11289","full_name":"Webersen, Manuel","first_name":"Manuel"},{"full_name":"Lugovtsova, Yevgeniya","last_name":"Lugovtsova","first_name":"Yevgeniya"},{"last_name":"Prager","full_name":"Prager, Jens","first_name":"Jens"},{"full_name":"Henning, Bernd","id":"213","last_name":"Henning","first_name":"Bernd"}],"date_created":"2021-05-07T07:33:54Z","title":"Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer Systems","doi":"10.5162/SMSI2021/A8.2","conference":{"name":"Sensor and Measurement Science International","location":"Nürnberg"},"type":"conference","status":"public","_id":"22013","project":[{"name":"Vermiedene Kreuzungen von Lamb-Wellenmoden in mehrlagigen Strukturen","_id":"105","grant_number":"449607253"}],"department":[{"_id":"49"}],"user_id":"32580","language":[{"iso":"eng"}]},{"doi":"10.1016/j.measurement.2021.109919","title":"Measurement procedure for acoustic absorption and bulk viscosity of liquids","date_created":"2021-08-02T13:42:06Z","author":[{"last_name":"Claes","orcid":"0000-0002-4393-268X","id":"11829","full_name":"Claes, Leander","first_name":"Leander"},{"last_name":"Chatwell","full_name":"Chatwell, René Spencer","first_name":"René Spencer"},{"last_name":"Baumhögger","id":"15164","full_name":"Baumhögger, Elmar","first_name":"Elmar"},{"last_name":"Hetkämper","id":"38123","full_name":"Hetkämper, Tim","first_name":"Tim"},{"last_name":"Zeipert","full_name":"Zeipert, Henning","id":"32580","first_name":"Henning"},{"first_name":"Jadran","last_name":"Vrabec","full_name":"Vrabec, Jadran"},{"last_name":"Henning","id":"213","full_name":"Henning, Bernd","first_name":"Bernd"}],"date_updated":"2022-04-26T09:01:07Z","citation":{"ama":"Claes L, Chatwell RS, Baumhögger E, et al. Measurement procedure for acoustic absorption and bulk viscosity of liquids. <i>Measurement</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1016/j.measurement.2021.109919\">10.1016/j.measurement.2021.109919</a>","apa":"Claes, L., Chatwell, R. S., Baumhögger, E., Hetkämper, T., Zeipert, H., Vrabec, J., &#38; Henning, B. (2021). Measurement procedure for acoustic absorption and bulk viscosity of liquids. <i>Measurement</i>, Article 109919. <a href=\"https://doi.org/10.1016/j.measurement.2021.109919\">https://doi.org/10.1016/j.measurement.2021.109919</a>","short":"L. Claes, R.S. Chatwell, E. Baumhögger, T. Hetkämper, H. Zeipert, J. Vrabec, B. Henning, Measurement (2021).","bibtex":"@article{Claes_Chatwell_Baumhögger_Hetkämper_Zeipert_Vrabec_Henning_2021, title={Measurement procedure for acoustic absorption and bulk viscosity of liquids}, DOI={<a href=\"https://doi.org/10.1016/j.measurement.2021.109919\">10.1016/j.measurement.2021.109919</a>}, number={109919}, journal={Measurement}, author={Claes, Leander and Chatwell, René Spencer and Baumhögger, Elmar and Hetkämper, Tim and Zeipert, Henning and Vrabec, Jadran and Henning, Bernd}, year={2021} }","mla":"Claes, Leander, et al. “Measurement Procedure for Acoustic Absorption and Bulk Viscosity of Liquids.” <i>Measurement</i>, 109919, 2021, doi:<a href=\"https://doi.org/10.1016/j.measurement.2021.109919\">10.1016/j.measurement.2021.109919</a>.","ieee":"L. Claes <i>et al.</i>, “Measurement procedure for acoustic absorption and bulk viscosity of liquids,” <i>Measurement</i>, Art. no. 109919, 2021, doi: <a href=\"https://doi.org/10.1016/j.measurement.2021.109919\">10.1016/j.measurement.2021.109919</a>.","chicago":"Claes, Leander, René Spencer Chatwell, Elmar Baumhögger, Tim Hetkämper, Henning Zeipert, Jadran Vrabec, and Bernd Henning. “Measurement Procedure for Acoustic Absorption and Bulk Viscosity of Liquids.” <i>Measurement</i>, 2021. <a href=\"https://doi.org/10.1016/j.measurement.2021.109919\">https://doi.org/10.1016/j.measurement.2021.109919</a>."},"year":"2021","publication_status":"published","publication_identifier":{"issn":["0263-2241"]},"language":[{"iso":"eng"}],"article_number":"109919","user_id":"15164","department":[{"_id":"49"},{"_id":"155"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"22925","status":"public","type":"journal_article","publication":"Measurement"},{"publication":"at - Automatisierungstechnik","type":"journal_article","abstract":[{"lang":"eng","text":"An approach for the non-destructive characterisation of adhesive bonds using guided ultrasonic waves is presented. Pulsed laser radiation is used to thermoacoustically excite broadband ultrasonic waves in a multi-layered sample, consisting of a metal plate adhesively joined to a polymeric layer using synthetic resin. The resulting signals are received by a purpose-built piezoelectric transducer. Varying the distance between excitation and detection yields spatio-temporal measurement data, from which the dispersive properties of the propagating waves can be inferred using a two-dimensional Fourier transform, assuming the plates to act as coupled waveguides. Coupled multi-layered waveguides show an effect referred to as <jats:italic>mode repulsion</jats:italic>, where the distance between certain modes in the frequency-wavenumber domain is assumed to be a measure of coupling strength. Measurements at different stages of curing of the adhesive layer are performed and evaluated. A comparison of the results shows changes in the dispersive properties, namely an increased modal bandwidth for the fully cured sample as well as an increased modal distance."}],"status":"public","_id":"27367","project":[{"_id":"105","name":"Vermiedene Kreuzungen von Lamb-Wellenmoden in mehrlagigen Strukturen","grant_number":"449607253"}],"department":[{"_id":"49"}],"user_id":"11829","language":[{"iso":"eng"}],"quality_controlled":"1","publication_identifier":{"issn":["2196-677X","0178-2312"]},"publication_status":"published","year":"2021","page":"962-969","citation":{"apa":"Zeipert, H., Claes, L., Johannesmann, S., Lugovtsova, Y., Nicolai, M., Prager, J., &#38; Henning, B. (2021). An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates. <i>At - Automatisierungstechnik</i>, 962–969. <a href=\"https://doi.org/10.1515/auto-2021-0089\">https://doi.org/10.1515/auto-2021-0089</a>","short":"H. Zeipert, L. Claes, S. Johannesmann, Y. Lugovtsova, M. Nicolai, J. Prager, B. Henning, At - Automatisierungstechnik (2021) 962–969.","mla":"Zeipert, Henning, et al. “An Approach to Adhesive Bond Characterisation Using Guided Acoustic Waves in Multi-Layered Plates.” <i>At - Automatisierungstechnik</i>, 2021, pp. 962–69, doi:<a href=\"https://doi.org/10.1515/auto-2021-0089\">10.1515/auto-2021-0089</a>.","bibtex":"@article{Zeipert_Claes_Johannesmann_Lugovtsova_Nicolai_Prager_Henning_2021, title={An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates}, DOI={<a href=\"https://doi.org/10.1515/auto-2021-0089\">10.1515/auto-2021-0089</a>}, journal={at - Automatisierungstechnik}, author={Zeipert, Henning and Claes, Leander and Johannesmann, Sarah and Lugovtsova, Yevgeniya and Nicolai, Marcel and Prager, Jens and Henning, Bernd}, year={2021}, pages={962–969} }","ama":"Zeipert H, Claes L, Johannesmann S, et al. An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates. <i>at - Automatisierungstechnik</i>. Published online 2021:962-969. doi:<a href=\"https://doi.org/10.1515/auto-2021-0089\">10.1515/auto-2021-0089</a>","chicago":"Zeipert, Henning, Leander Claes, Sarah Johannesmann, Yevgeniya Lugovtsova, Marcel Nicolai, Jens Prager, and Bernd Henning. “An Approach to Adhesive Bond Characterisation Using Guided Acoustic Waves in Multi-Layered Plates.” <i>At - Automatisierungstechnik</i>, 2021, 962–69. <a href=\"https://doi.org/10.1515/auto-2021-0089\">https://doi.org/10.1515/auto-2021-0089</a>.","ieee":"H. Zeipert <i>et al.</i>, “An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates,” <i>at - Automatisierungstechnik</i>, pp. 962–969, 2021, doi: <a href=\"https://doi.org/10.1515/auto-2021-0089\">10.1515/auto-2021-0089</a>."},"date_updated":"2022-01-17T13:06:47Z","author":[{"full_name":"Zeipert, Henning","id":"32580","last_name":"Zeipert","first_name":"Henning"},{"last_name":"Claes","orcid":"0000-0002-4393-268X","id":"11829","full_name":"Claes, Leander","first_name":"Leander"},{"full_name":"Johannesmann, Sarah","id":"29190","last_name":"Johannesmann","first_name":"Sarah"},{"last_name":"Lugovtsova","full_name":"Lugovtsova, Yevgeniya","first_name":"Yevgeniya"},{"last_name":"Nicolai","full_name":"Nicolai, Marcel","first_name":"Marcel"},{"first_name":"Jens","full_name":"Prager, Jens","last_name":"Prager"},{"first_name":"Bernd","last_name":"Henning","id":"213","full_name":"Henning, Bernd"}],"date_created":"2021-11-11T09:38:20Z","title":"An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates","doi":"10.1515/auto-2021-0089","main_file_link":[{"url":"https://www.degruyter.com/document/doi/10.1515/auto-2021-0089/html"}]},{"status":"public","file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2022-05-12T15:28:52Z","creator":"timh1","date_created":"2022-05-12T15:28:52Z","file_size":870692,"access_level":"open_access","file_name":"Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik.pdf","file_id":"31240"}],"publication":"Fortschritte der Akustik - DAGA 2021","type":"conference","ddc":["620"],"language":[{"iso":"ger"}],"file_date_updated":"2022-05-12T15:28:52Z","_id":"25880","department":[{"_id":"49"}],"user_id":"38123","year":"2021","citation":{"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.","mla":"Hetkämper, Tim, et al. “Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik.” <i>Fortschritte der Akustik - DAGA 2021</i>, 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."},"has_accepted_license":"1","publication_status":"published","title":"Tomographie des Schallfelds von Ultraschallwandlern mittels Schlierentechnik","conference":{"name":"DAGA 2021 - 47. Jahrestagung für Akustik"},"date_updated":"2022-05-12T15:29:26Z","oa":"1","author":[{"first_name":"Tim","last_name":"Hetkämper","full_name":"Hetkämper, Tim","id":"38123"},{"first_name":"Dmitrij","last_name":"Dreiling","full_name":"Dreiling, Dmitrij","id":"32616"},{"first_name":"Leander","orcid":"0000-0002-4393-268X","last_name":"Claes","id":"11829","full_name":"Claes, Leander"},{"first_name":"Bernd","last_name":"Henning","id":"213","full_name":"Henning, Bernd"}],"date_created":"2021-10-08T08:08:17Z"},{"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":[{"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.","lang":"eng"}],"file":[{"content_type":"application/octet-stream","success":1,"relation":"main_file","date_updated":"2021-10-04T07:49:28Z","creator":"dmitrij","date_created":"2021-10-04T07:49:28Z","file_size":906618,"file_name":"daga","access_level":"closed","file_id":"25268"}],"date_updated":"2022-09-05T12:54:31Z","author":[{"id":"32616","full_name":"Dreiling, Dmitrij","last_name":"Dreiling","first_name":"Dmitrij"},{"last_name":"Itner","full_name":"Itner, Dominik","first_name":"Dominik"},{"last_name":"Feldmann","full_name":"Feldmann, Nadine","id":"23082","first_name":"Nadine"},{"last_name":"Scheidemann","full_name":"Scheidemann, Claus","id":"38259","first_name":"Claus"},{"last_name":"Gravenkamp","full_name":"Gravenkamp, Hauke","first_name":"Hauke"},{"first_name":"Bernd","last_name":"Henning","id":"213","full_name":"Henning, Bernd"}],"conference":{"start_date":"2021-08-15","name":"DAGA 2021 - 47. JAHRESTAGUNG FÜR AKUSTIK","location":"Wien","end_date":"2021-08-18"},"has_accepted_license":"1","publication_status":"published","place":"Wien","citation":{"apa":"Dreiling, D., Itner, D., Feldmann, N., Scheidemann, C., Gravenkamp, H., &#38; Henning, B. (2021). Application and modelling of ultrasonic transducers using 1-3 piezoelectric composites with structured electrodes. <i>Fortschritte Der Akustik - DAGA 2021</i>. DAGA 2021 - 47. JAHRESTAGUNG FÜR AKUSTIK, Wien.","mla":"Dreiling, Dmitrij, et al. “Application and Modelling of Ultrasonic Transducers Using 1-3 Piezoelectric Composites with Structured Electrodes.” <i>Fortschritte Der Akustik - DAGA 2021</i>, Deutsche Gesellschaft für Akustik e.V. (DEGA), 2021.","bibtex":"@inproceedings{Dreiling_Itner_Feldmann_Scheidemann_Gravenkamp_Henning_2021, place={Wien}, title={Application and modelling of ultrasonic transducers using 1-3 piezoelectric composites with structured electrodes}, booktitle={Fortschritte der Akustik - DAGA 2021}, publisher={Deutsche Gesellschaft für Akustik e.V. (DEGA)}, author={Dreiling, Dmitrij and Itner, Dominik and Feldmann, Nadine and Scheidemann, Claus and Gravenkamp, Hauke and Henning, Bernd}, year={2021} }","short":"D. Dreiling, D. Itner, N. Feldmann, C. Scheidemann, H. Gravenkamp, B. Henning, in: Fortschritte Der Akustik - DAGA 2021, Deutsche Gesellschaft für Akustik e.V. (DEGA), Wien, 2021.","ama":"Dreiling D, Itner D, Feldmann N, Scheidemann C, Gravenkamp H, Henning B. Application and modelling of ultrasonic transducers using 1-3 piezoelectric composites with structured electrodes. In: <i>Fortschritte Der Akustik - DAGA 2021</i>. Deutsche Gesellschaft für Akustik e.V. (DEGA); 2021.","ieee":"D. Dreiling, D. Itner, N. Feldmann, C. Scheidemann, H. Gravenkamp, and B. Henning, “Application and modelling of ultrasonic transducers using 1-3 piezoelectric composites with structured electrodes,” presented at the DAGA 2021 - 47. JAHRESTAGUNG FÜR AKUSTIK, Wien, 2021.","chicago":"Dreiling, Dmitrij, Dominik Itner, Nadine Feldmann, Claus Scheidemann, Hauke Gravenkamp, and Bernd Henning. “Application and Modelling of Ultrasonic Transducers Using 1-3 Piezoelectric Composites with Structured Electrodes.” In <i>Fortschritte Der Akustik - DAGA 2021</i>. Wien: Deutsche Gesellschaft für Akustik e.V. (DEGA), 2021."},"_id":"25265","project":[{"grant_number":"409779252","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","_id":"89"}],"department":[{"_id":"49"},{"_id":"151"}],"user_id":"38259","file_date_updated":"2021-10-04T07:49:28Z","type":"conference","status":"public"},{"date_created":"2021-03-15T13:56:04Z","supervisor":[{"last_name":"Henning","id":"213","full_name":"Henning, Bernd","first_name":"Bernd"},{"last_name":"Vrabec","full_name":"Vrabec, Jadran","first_name":"Jadran"}],"author":[{"id":"11829","full_name":"Claes, Leander","orcid":"0000-0002-4393-268X","last_name":"Claes","first_name":"Leander"}],"date_updated":"2022-09-06T07:08:31Z","publisher":"Universiät Paderborn","oa":"1","doi":"10.17619/UNIPB/1-1104","main_file_link":[{"url":"https://digital.ub.uni-paderborn.de/doi/10.17619/UNIPB/1-1104","open_access":"1"}],"title":"Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität","page":"223","citation":{"chicago":"Claes, Leander. <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn, 2021. <a href=\"https://doi.org/10.17619/UNIPB/1-1104\">https://doi.org/10.17619/UNIPB/1-1104</a>.","ieee":"L. Claes, <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn, 2021.","ama":"Claes L. <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn; 2021. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1104\">10.17619/UNIPB/1-1104</a>","short":"L. Claes, Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität, Universiät Paderborn, 2021.","mla":"Claes, Leander. <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn, 2021, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1104\">10.17619/UNIPB/1-1104</a>.","bibtex":"@book{Claes_2021, title={Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-1104\">10.17619/UNIPB/1-1104</a>}, publisher={Universiät Paderborn}, author={Claes, Leander}, year={2021} }","apa":"Claes, L. (2021). <i>Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität</i>. Universiät Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-1104\">https://doi.org/10.17619/UNIPB/1-1104</a>"},"year":"2021","department":[{"_id":"49"}],"user_id":"11829","_id":"21502","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"language":[{"iso":"ger"}],"type":"dissertation","status":"public","abstract":[{"text":"Die vollständige Beschreibung fluiddynamischer und akustischer Vorgänge setzt voraus, dass die Eigenschaften des Fluids hinlänglich bekannt sind.Während Fluidkenngrößen, wie etwa die Schallgeschwindigkeit oder die Scherviskosität, für viele Flüssigkeiten über weite Bereiche des thermodynamischen Zustandsraums bekannt sind, existieren für die Volumenviskosität nur eine geringe Anzahl Messdaten.In dieser Arbeit wird daher ein Messverfahren zur selektiven Bestimmung der Volumenviskosität von Flüssigkeiten, basierend auf der Absorption von Ultraschallwellen, entwickelt und realisiert.Schwerpunkte bilden dabei der simulationsgestützte Entwurf von Algorithmen zur Auswertung der Messsignale sowie die Analyse und Weiterentwicklung einer Messanordnung, basierend auf dem Puls-Echo-Verfahren. Neben der Absorption im Fluid treten dabei weitere Effekte (zum Beispiel Beugung oder unvollständige Reflexion) auf, die das akustische Signal schwächen oder anderweitig beeinflussen. Die Entwicklung von Verfahren zur Trennung dieser Effekte von der akustischen Absorption bildet daher einen weiteren Schwerpunkt dieser Arbeit.Abschließend wird die Volumenviskosität aus der gemessenen akustischen Absorption für unterschiedliche Fluide in verschiedenen thermodynamischen Zuständen unter Zuhilfenahme anderer bekannter Fluidkenngrößen bestimmt sowie eine Unsicherheitsbetrachtung durchgeführt.","lang":"ger"},{"text":"The prerequisite for a complete description of fluid dynamic and acoustic processes is that all properties of the fluid are known.While fluid parameters such as the speed of sound or the shear viscosity are known for many liquids over a wide range of thermodynamic states, only limited measurement data exist for the bulk viscosity.In this thesis, a measurement method for the selective determination of the bulk viscosity of liquids, based on the absorption of ultrasonic waves, is developed and implemented.The focus is on the simulation-driven design of algorithms for processing the measurement signals as well as the analysis and further development of a measurement set-up based on the pulse-echo method.In addition to absorption in the fluid, there are other effects (for example diffraction or incomplete reflection) that weaken or otherwise influence the acoustic signal.Therefore, the development of procedures to separate these effects from acoustic absorption is another focus of this work.The bulk viscosity is determined from the measured acoustic absorption for different fluids in different thermodynamic states. An uncertainty analysis of the measured quantities concludes this thesis.","lang":"eng"}]},{"publication_status":"published","intvolume":"       700","citation":{"ieee":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, and B. Henning, “Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions Using the Scaled Boundary Finite Element Method,” in <i>14th WCCM-ECCOMAS Congress</i>, 2021, vol. 700, doi: <a href=\"https://doi.org/10.23967/wccm-eccomas.2020.307\">10.23967/wccm-eccomas.2020.307</a>.","chicago":"Itner, D., H. Gravenkamp, Dmitrij Dreiling, Nadine Feldmann, and Bernd Henning. “Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions Using the Scaled Boundary Finite Element Method.” In <i>14th WCCM-ECCOMAS Congress</i>, Vol. 700. Numerical Methods and Algorithms in Science and Engineering. CIMNE, 2021. <a href=\"https://doi.org/10.23967/wccm-eccomas.2020.307\">https://doi.org/10.23967/wccm-eccomas.2020.307</a>.","ama":"Itner D, Gravenkamp H, Dreiling D, Feldmann N, Henning B. Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions Using the Scaled Boundary Finite Element Method. In: <i>14th WCCM-ECCOMAS Congress</i>. Vol 700. Numerical Methods and Algorithms in Science and Engineering. CIMNE; 2021. doi:<a href=\"https://doi.org/10.23967/wccm-eccomas.2020.307\">10.23967/wccm-eccomas.2020.307</a>","mla":"Itner, D., et al. “Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions Using the Scaled Boundary Finite Element Method.” <i>14th WCCM-ECCOMAS Congress</i>, vol. 700, CIMNE, 2021, doi:<a href=\"https://doi.org/10.23967/wccm-eccomas.2020.307\">10.23967/wccm-eccomas.2020.307</a>.","bibtex":"@inproceedings{Itner_Gravenkamp_Dreiling_Feldmann_Henning_2021, series={Numerical Methods and Algorithms in Science and Engineering}, title={Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions Using the Scaled Boundary Finite Element Method}, volume={700}, DOI={<a href=\"https://doi.org/10.23967/wccm-eccomas.2020.307\">10.23967/wccm-eccomas.2020.307</a>}, booktitle={14th WCCM-ECCOMAS Congress}, publisher={CIMNE}, author={Itner, D. and Gravenkamp, H. and Dreiling, Dmitrij and Feldmann, Nadine and Henning, Bernd}, year={2021}, collection={Numerical Methods and Algorithms in Science and Engineering} }","short":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, B. Henning, in: 14th WCCM-ECCOMAS Congress, CIMNE, 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 Using the Scaled Boundary Finite Element Method. <i>14th WCCM-ECCOMAS Congress</i>, <i>700</i>. <a href=\"https://doi.org/10.23967/wccm-eccomas.2020.307\">https://doi.org/10.23967/wccm-eccomas.2020.307</a>"},"volume":700,"author":[{"full_name":"Itner, D.","last_name":"Itner","first_name":"D."},{"last_name":"Gravenkamp","full_name":"Gravenkamp, H.","first_name":"H."},{"first_name":"Dmitrij","last_name":"Dreiling","full_name":"Dreiling, Dmitrij","id":"32616"},{"full_name":"Feldmann, Nadine","id":"23082","last_name":"Feldmann","first_name":"Nadine"},{"full_name":"Henning, Bernd","id":"213","last_name":"Henning","first_name":"Bernd"}],"date_updated":"2023-01-27T15:28:35Z","oa":"1","conference":{"end_date":"2021-01-15","start_date":"2021-01-11","name":"14th World Congress on Computational Mechanics (WCCM)"},"doi":"10.23967/wccm-eccomas.2020.307","main_file_link":[{"open_access":"1","url":"https://www.scipedia.com/public/Itner_et_al_2021a"}],"type":"conference","status":"public","department":[{"_id":"49"}],"series_title":"Numerical Methods and Algorithms in Science and Engineering","user_id":"32616","_id":"40541","project":[{"_id":"89","name":"VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren","grant_number":"409779252"}],"year":"2021","date_created":"2023-01-27T15:08:47Z","publisher":"CIMNE","title":"Simulation of Guided Waves in Cylinders Subject to Arbitrary Boundary Conditions Using the Scaled Boundary Finite Element Method","publication":"14th WCCM-ECCOMAS Congress","license":"https://creativecommons.org/licenses/by-nc-sa/3.0/","language":[{"iso":"eng"}]},{"status":"public","type":"journal_article","publication":"Ultrasonics","language":[{"iso":"eng"}],"article_number":"106389","user_id":"32616","department":[{"_id":"49"}],"project":[{"_id":"89","name":"Vollständige Bestimmung der akustischen Materialparameter von Polymeren","grant_number":"409779252"}],"_id":"21232","citation":{"bibtex":"@article{Itner_Gravenkamp_Dreiling_Feldmann_Henning_2021, title={Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads}, DOI={<a href=\"https://doi.org/10.1016/j.ultras.2021.106389\">10.1016/j.ultras.2021.106389</a>}, number={106389}, journal={Ultrasonics}, author={Itner, Dominik and Gravenkamp, Hauke and Dreiling, Dmitrij and Feldmann, Nadine and Henning, Bernd}, year={2021} }","mla":"Itner, Dominik, et al. “Efficient Semi-Analytical Simulation of Elastic Guided Waves in Cylinders Subject to Arbitrary Non-Symmetric Loads.” <i>Ultrasonics</i>, 106389, 2021, doi:<a href=\"https://doi.org/10.1016/j.ultras.2021.106389\">10.1016/j.ultras.2021.106389</a>.","short":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, B. Henning, Ultrasonics (2021).","apa":"Itner, D., Gravenkamp, H., Dreiling, D., Feldmann, N., &#38; Henning, B. (2021). Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads. <i>Ultrasonics</i>, Article 106389. <a href=\"https://doi.org/10.1016/j.ultras.2021.106389\">https://doi.org/10.1016/j.ultras.2021.106389</a>","ama":"Itner D, Gravenkamp H, Dreiling D, Feldmann N, Henning B. Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads. <i>Ultrasonics</i>. Published online 2021. doi:<a href=\"https://doi.org/10.1016/j.ultras.2021.106389\">10.1016/j.ultras.2021.106389</a>","chicago":"Itner, Dominik, Hauke Gravenkamp, Dmitrij Dreiling, Nadine Feldmann, and Bernd Henning. “Efficient Semi-Analytical Simulation of Elastic Guided Waves in Cylinders Subject to Arbitrary Non-Symmetric Loads.” <i>Ultrasonics</i>, 2021. <a href=\"https://doi.org/10.1016/j.ultras.2021.106389\">https://doi.org/10.1016/j.ultras.2021.106389</a>.","ieee":"D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, and B. Henning, “Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads,” <i>Ultrasonics</i>, Art. no. 106389, 2021, doi: <a href=\"https://doi.org/10.1016/j.ultras.2021.106389\">10.1016/j.ultras.2021.106389</a>."},"year":"2021","publication_status":"published","publication_identifier":{"issn":["0041-624X"]},"quality_controlled":"1","doi":"10.1016/j.ultras.2021.106389","title":"Efficient semi-analytical simulation of elastic guided waves in cylinders subject to arbitrary non-symmetric loads","date_created":"2021-02-15T09:53:32Z","author":[{"full_name":"Itner, Dominik","last_name":"Itner","first_name":"Dominik"},{"first_name":"Hauke","full_name":"Gravenkamp, Hauke","last_name":"Gravenkamp"},{"first_name":"Dmitrij","full_name":"Dreiling, Dmitrij","id":"32616","last_name":"Dreiling"},{"first_name":"Nadine","last_name":"Feldmann","full_name":"Feldmann, Nadine","id":"23082"},{"id":"213","full_name":"Henning, Bernd","last_name":"Henning","first_name":"Bernd"}],"date_updated":"2023-09-25T08:09:24Z"},{"title":"\t Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers","main_file_link":[{"open_access":"1","url":"https://digital.ub.uni-paderborn.de/urn/urn:nbn:de:hbz:466:2-40232"}],"doi":"10.17619/UNIPB/1-1264","publisher":"Universität Paderborn","date_updated":"2026-01-05T07:55:46Z","oa":"1","author":[{"first_name":"Nadine","last_name":"Feldmann","full_name":"Feldmann, Nadine","id":"23082"}],"date_created":"2019-01-09T14:37:11Z","supervisor":[{"last_name":"Henning","id":"213","full_name":"Henning, Bernd","first_name":"Bernd"},{"last_name":"Walther","full_name":"Walther, Andrea","first_name":"Andrea"}],"year":"2021","citation":{"ama":"Feldmann N. <i>  Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers</i>. Universität Paderborn; 2021. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1264\">10.17619/UNIPB/1-1264</a>","chicago":"Feldmann, Nadine. <i>  Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers</i>. Universität Paderborn, 2021. <a href=\"https://doi.org/10.17619/UNIPB/1-1264\">https://doi.org/10.17619/UNIPB/1-1264</a>.","ieee":"N. Feldmann, <i>  Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers</i>. Universität Paderborn, 2021.","bibtex":"@book{Feldmann_2021, title={  Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-1264\">10.17619/UNIPB/1-1264</a>}, publisher={Universität Paderborn}, author={Feldmann, Nadine}, year={2021} }","mla":"Feldmann, Nadine. <i>  Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers</i>. Universität Paderborn, 2021, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-1264\">10.17619/UNIPB/1-1264</a>.","short":"N. Feldmann,   Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers, Universität Paderborn, 2021.","apa":"Feldmann, N. (2021). <i>  Ein modellbasiertes Messverfahren zur Charakterisierung von Piezokeramiken unter Verwendung eines einzelnen scheibenförmigen Probekörpers</i>. Universität Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-1264\">https://doi.org/10.17619/UNIPB/1-1264</a>"},"page":"184","language":[{"iso":"ger"}],"project":[{"name":"ChaMP: Ein modellbasiertes Messverfahren zur Charakterisierung der frequenzabhängigen Materialeigenschaften von Piezokeramiken unter Verwendung eines einzelnen Probekörperindividuums","_id":"90"},{"_id":"245","name":"FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken für Leistungsschallanwendungen (NEPTUN)"}],"_id":"6563","user_id":"11829","department":[{"_id":"49"}],"abstract":[{"text":"Designprozesse von Schallwandlern werden durch zunehmende Rechenkapazitäten immer mehr durch simulative Betrachtungen unterstützt. Dabei ist vor allem die Wahl der Materialparameter der verwendeten Materialien wichtig für ein realitätsnahes Simulationsergebnis. Bei Schallwandlern werden häufig Piezokeramiken als aktive Elemente genutzt, welche sich durch eine Verkopplung mechanischer und elektrischer Eigenschaften auszeichnen. Zur Bestimmung ihrer Materialparameter stellt der IEEE Standard on Piezoelectricity ein standardisiertes Verfahren dar. Dazu sind fünf Impedanzmessungen an vier unterschiedlich gefertigten Probekörpergeometrien notwendig. Da an jedem einzelnen Probekörper nur eine Untermenge aller notwendigen Materialparameter bestimmt werden kann, werden diese dann zu einem kompletten Materialparametersatz zusammengefügt. Aufgrund der unterschiedlichen Prozessbedingungen, bei denen die jeweiligen Probekörper hergestellt werden, ist dieser Materialparametersatz jedoch inkonsistent und kann nie das Verhalten einer einzelnen Probe beschreiben. Daher wird in der vorliegenden Arbeit ein Messverfahren entwickelt, mit dem es möglich ist, alle relevanten Materialparameter unter besonderer Berücksichtigung von Dämpfung an einem einzelnen Probekörper allein durch Impedanzmessungen zu bestimmen. Als Probekörper wird dazu eine in der Anwendung häufig verwendete Scheibengeometrie verwendet. Um eine hinreichend hohe Sensitivität auf alle Materialparameter zu gewährleisten, wird diese mit einer optimierten Elektrodentopologie gefertigt. Da in diesem Fall keine analytische Betrachtung mehr möglich ist, wird das Messverfahren durch einen inversen Ansatz realisiert.","lang":"ger"},{"lang":"eng","text":"Design processes of ultrasonic transducers become increasingly simulation-driven due to rising computational capabilities. Therewithin, the choice of the material parameters for modelling the materials used is particularly important for a realistic simulation result. Piezoceramics, which couple mechanic and electrical properties, are often used as active elements in ultrasonic transducers.The IEEE Standard on Piezoelectricity is a standardised procedure for determining these parameters that requires five impedance measurements on four piezocermics of different geometry. Since only a subset of all necessary material parameters can be determined for each individual specimen, these are then combined to form a complete set of material parameters. Due to different processing conditions for each specimen, this set of material parameters is inconsistent and cannot describe the behaviour of a single specimen appropriately. Therefore, in the present thesis, a method is developed with enables the determination of all relevant material parameters including damping on a single piezocermic by means of electrical impedance measurements alone. A piezoelectric ceramic with disc-shaped geometry, which is frequently used in applications, is used as a specimen.In order to ensure a sufficiently high sensitivity to all material parameters, it is manufactured with an optimised electrode topology. Because in this case analytical solutions, which relate the measurement quantities to the material parameters, do not exist, the measurement method is implemented using an inverse approach."}],"status":"public","type":"dissertation"}]