RT Journal Article
T1 Experimental Configuration to Determine the Nonlinear Parameter in PMMA and CFRP with the Finite Amplitude Method
A1 Callejas, Antonio
A1 Rus, Guillermo
K1 nonlinear parameter
K1 finite amplitude method
K1 harmonic generation
K1 polymethylmethacrylate
K1 carbon fiber reinforced polymer
K1 Acoustic nonlinearity
K1 Ultrasonic-waves
K1 B/a
K1 Diffraction
K1 Generation
K1 Water
AB Parameters to measure nonlinearity in polymethylmethacrylate (PMMA) and carbon fiber reinforced polymer (CFRP) materials have been determined with nonlinear ultrasound (NLUS). The nonlinear parameter has been determined using the variation of the Finite Amplitude Method (FAM) with harmonic generation. Using this as a reference, the first contribution of this work consists of deducting the experimental configuration necessary to measure this nonlinear parameter in a correct and feasible way. Excitation level, frequency of the wave generated, number of cycles analysed and the distances transducer-specimen and specimen-hydrophone have been determined in both materials. The second contribution is a semi-analytical model that allows to obtain the nonlinear parameter in materials by removing water contribution and considering geometric and viscous attenuation, using the data obtained in an immersion tank. Finally, an application of this model has been carried out in PMMA in order to determinate the nonlinear parameter in this material. From the results, we confirm that the configuration determined in this paper to obtain the parameter decreases the noise in the measurements.
PB MDPI AG
YR 2019
FD 2019-02-28
LK http://hdl.handle.net/10668/19327
UL http://hdl.handle.net/10668/19327
LA en
NO Callejas A, Rus G. Experimental Configuration to Determine the Nonlinear Parameter β in PMMA and CFRP with the Finite Amplitude Method. Sensors (Basel). 2019 Mar 7;19(5):1156.
NO This research was funded by the Ministry of Education DPI2017-83859-R.
DS RISalud
RD Apr 6, 2025