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 - Johannesmann, Sarah AU - Claes, Leander AU - Henning, Bernd ID - 6588 T2 - Fortschritte der Akustik - DAGA 2022 TI - Estimation of viscoelastic material parameters of polymers using Lamb waves ER - TY - GEN AU - Johannesmann, Sarah ID - 6560 TI - Inverses Verfahren zur Bestimmung viskoelastischer Materialparameter 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 - JOUR AB - 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. AU - Claes, Leander AU - Schmiegel, Hanna AU - Grünsteidl, Clemens AU - Johannesmann, Sarah AU - Webersen, Manuel AU - Henning, Bernd ID - 21067 IS - 3 JF - tm - Technisches Messen SN - 2196-7113 TI - Investigating peculiarities of piezoelectric detection methods for acoustic plate waves in material characterisation applications VL - 88 ER - TY - JOUR AU - Johannesmann, Sarah AU - Claes, Leander AU - Henning, Bernd ID - 23791 IS - s1 JF - tm - Technisches Messen TI - Lamb wave based approach to the determination of elastic and viscoelastic material parameters VL - 88 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 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 - CONF AU - Johannesmann, Sarah AU - Becker, Sebastian AU - Webersen, Manuel AU - Henning, Bernd ID - 15264 SN - 978-3-9819376-2-6 T2 - SMSI 2020 - Measurement Science TI - Determination of Murnaghan constants of plate-shaped polymers under uniaxial tensile load ER - TY - CONF AU - Johannesmann, Sarah AU - Webersen, Manuel AU - Düchting, Julia AU - Claes, Leander AU - Henning, Bernd ID - 9718 T2 - 45th Annual Review of Progress in Quantitative Nondestructive Evaluation TI - Characterization of the linear-acoustic material behavior of fiber-reinforced composites using lamb waves VL - 38 ER - TY - CONF AU - Lugovtsova, Yevgeniya AU - Johannesmann, Sarah AU - Henning, Bernd AU - Prager, Jens ID - 15261 T2 - 2019 International Congress on Ultrasonics TI - Analysis of Lamb wave mode repulsion and its implications to the characterisation of adhesive bonding strength ER - TY - CONF AU - Johannesmann, Sarah AU - Springer, Dimitri AU - Thiel, Christian AU - Henning, Bernd ED - Gesellschaft für Akustik e.V., Deutsche ID - 10042 T2 - Fortschritte der Akustik - DAGA 2019 TI - Störeffektunterdrückung in 2D-Messdaten mittels DiscoGAN VL - 45 ER - TY - CONF AU - Claes, Leander AU - Johannesmann, Sarah AU - Baumhögger, Elmar AU - Henning, Bernd ID - 13647 T2 - 2019 International Congress on Ultrasonics TI - Quantification of frequency-dependent absorption phenomena ER - TY - JOUR AU - Johannesmann, Sarah AU - Düchting, Julia AU - Webersen, Manuel AU - Claes, Leander AU - Henning, Bernd ID - 6567 IS - 85 JF - tm - Technisches Messen KW - Continous-fibre reinforced plastics KW - material parameters KW - orthotropy KW - ultrasonics SN - 0171-8096 TI - An acoustic waveguide-based approach to the complete characterisation of linear elastic, orthotropic material behaviour VL - 2018 ER - TY - CONF AU - Johannesmann, Sarah AU - Brockschmidt, Tobias AU - Rump, Friedhelm AU - Webersen, Manuel AU - Claes, Leander AU - Henning, Bernd ID - 6568 T2 - Sensoren und Messsysteme TI - Acoustic material characterization of prestressed, plate-shaped specimens ER - TY - JOUR AU - Webersen, Manuel AU - Johannesmann, Sarah AU - Düchting, Julia AU - Claes, Leander AU - Henning, Bernd ID - 6577 JF - Ultrasonics TI - Guided ultrasonic waves for determining effective orthotropic material parameters of continuous-fiber reinforced thermoplastic plates VL - 84 ER -