TY - CONF AU - Zeipert, Henning AU - von Germeten, Christian AU - Friesen, Olga AU - Claes, Leander AU - Johannesmann, Sarah AU - Henning, Bernd ID - 43233 T2 - Fortschritte der Akustik - DAGA 2023 TI - Investigation of change in dispersive behaviour during adhesive curing in multi-layered structures ER - TY - CONF AU - Nicolai, Marcel AU - Zeipert, Henning AU - Lugovtsova, Yevgeniya AU - Bulling, Jannis AU - Johannesmann, Sarah AU - Prager, Jens AU - Henning, Bernd ID - 43234 T2 - Fortschritte der Akustik - DAGA 2023 TI - Characterization of adhesion strength using guided ultrasonic waves ER - TY - CONF AU - Nicolai, Marcel AU - Zeipert, Henning AU - Lugovtsova, Yevgeniya AU - Bulling, Jannis AU - Johannesmann, Sarah AU - Prager, Jens AU - Henning, Bernd ID - 6590 T2 - Fortschritte der Akustik - DAGA 2022 TI - Quantification of the adhesive coupling of layered structures using guided ultrasonic waves ER - TY - JOUR AB - Abstract In this paper a measurement procedure to identify viscoelastic material parameters of plate-like samples using broadband ultrasonic waves is presented. Ultrasonic Lamb waves are excited via the thermoelastic effect using laser radiation and detected by a piezoelectric transducer. The resulting measurement data is transformed to yield information about multiple propagating Lamb waves as well as their attenuation. These results are compared to simulation results in an inverse procedure to identify the parameters of an elastic and a viscoelastic material model. AU - Johannesmann, Sarah AU - Claes, Leander AU - Feldmann, Nadine AU - Zeipert, Henning AU - Henning, Bernd ID - 30863 IS - 7 - 8 JF - tm - Technisches Messen KW - Electrical and Electronic Engineering KW - Instrumentation SN - 2196-7113 TI - Lamb wave based approach to the determination of acoustic material parameters VL - 89 ER - TY - CONF AU - Zeipert, Henning AU - Johannesmann, Sarah AU - Nicolai, Marcel AU - Lugovtsova, Yevgeniya AU - Prager, Jens AU - Henning, Bernd ID - 26033 T2 - Fortschritte der Akustik - DAGA 2021 TI - Quantifying the coupling strength of adhesively bonded materials by investigating mode repulsion regions ER - TY - CONF AU - Lugovtsova, Yevgeniya AU - Zeipert, Henning AU - Johannesmann, Sarah AU - Nicolai, Marcel AU - Prager, Jens AU - Henning, Bernd ID - 27847 T2 - МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ В ЕСТЕСТВЕННЫХ НАУКАХ - XXX Всероссийская школа-конференция TI - К ОПРЕДЕЛЕНИЮ ПРОЧНОСТИ КЛЕЕВОГО СОЕДИНЕНИЯ В МНОГОСЛОЙНЫХ МАТЕРИАЛАХ ПУТЕМ ИССЛЕДОВАНИЯ ОБЛАСТЕЙ РАСТАЛКИВАНИЯ БЕГУЩИХ УПРУГИХ ВОЛН ER - TY - CONF AU - Zeipert, Henning AU - Claes, Leander AU - Johannesmann, Sarah AU - Webersen, Manuel AU - Lugovtsova, Yevgeniya AU - Prager, Jens AU - Henning, Bernd ID - 22013 TI - Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer Systems ER - TY - JOUR AU - Claes, Leander AU - Chatwell, René Spencer AU - Baumhögger, Elmar AU - Hetkämper, Tim AU - Zeipert, Henning AU - Vrabec, Jadran AU - Henning, Bernd ID - 22925 JF - Measurement SN - 0263-2241 TI - Measurement procedure for acoustic absorption and bulk viscosity of liquids ER - TY - JOUR AB - 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 mode repulsion, 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. AU - Zeipert, Henning AU - Claes, Leander AU - Johannesmann, Sarah AU - Lugovtsova, Yevgeniya AU - Nicolai, Marcel AU - Prager, Jens AU - Henning, Bernd ID - 27367 JF - at - Automatisierungstechnik SN - 2196-677X TI - An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates ER - TY - GEN AU - Claes, Leander AU - Zeipert, Henning AU - Koppa, Peter AU - Tröster, Thomas AU - Henning, Bernd ID - 6594 TI - Additiv gefertigte, akustische Diffusor-Strukturen für Ultraschallanwendungen ER - TY - CONF AU - Claes, Leander AU - Zeipert, Henning AU - Koppa, Peter AU - Tröster, Thomas AU - Henning, Bernd ID - 6559 T2 - Proceedings of Meetings on Acoustics TI - Additively manufactured acoustic diffuser structures for ultrasonic measurement applications ER -