TY - CONF
A1 - Bulling, Jannis
A1 - Franosch, Georg
A1 - Lugovtsova, Yevgeniya
A1 - Prager, Jens
A2 - Rizzo, P.
A2 - Milazzo, A.
T1 - Sensitivity of Ultrasonic Guided Waves to Elastic Constants: A Numerical Study
T2 - Lecture Notes in Civil Engineering
N2 - The dispersive properties of Lamb waves can be utilised for material characterisation because the frequency-wavenumber-relationship, as well as the group velocity, depend on material parameters. These dependencies make a non-destructive estimation of an elastic constant possible. This preliminary study investigates the sensitivity of dispersion curves caused by a change in elastic constants. The Scaled Boundary Finite Element Method is used to compute special dispersion curves, which show the sensitivity value of the frequency and group velocity as a colour value. This representation allows for easy identification of patterns and local effects. Two sets of dispersion curves are presented, one set for a steel plate and the other set for a plate made of a carbon fibre reinforced polymer. In general, we notice that the sensitivity often increases with the frequency and that higher-order modes seem to be more suitable for material characterisation. Moreover, specific modes respond to material changes while others are relatively unaffected, which must be taken into consideration for material characterisation.
PB - Springer
CY - Cham
T2 - European Workshop on Structural Health Monitoring (EWSHM 2020)
CY - Online meeting
DA - 06.07.2020
KW - Scaled Boundary Finite Element Method
KW - Lamb waves
KW - Dispersion curves
KW - Carbon fibre reinforced polymer
KW - Transverse isotropy
PY - 2021
UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/51986
AN - OPUS4-51986
SN - 978-3-030-64593-9
VL - 127
SP - 759
EP - 768
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany