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 -