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dc.contributor.authorCallejas Zafra, Antonio Manuel 
dc.contributor.authorRus Carlborg, Guillermo
dc.identifier.citationCallejas, A.; Rus Carlborg, G. Experimental Configuration to Determine the Nonlinear Parameter β in PMMA and CFRP with the Finite Amplitude Method. Sensors 2019, 19, 1156; doi:10.3390/s19051156.es_ES
dc.description.abstractParameters to measure nonlinearity in polymethylmethacrylate (PMMA) and carbon fiber reinforced polymer (CFRP) materials have been determined with nonlinear ultrasound (NLUS). The nonlinear parameter b 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 β decreases the noise in the measurements.es_ES
dc.description.sponsorshipThis research was funded by the Ministry of Education DPI2017-83859-R.es_ES
dc.rightsAtribución 3.0 España*
dc.subjectNonlinear parameter βes_ES
dc.subjectFinite amplitude methodes_ES
dc.subjectHarmonic generationes_ES
dc.subjectCarbon fiber reinforced polymeres_ES
dc.titleExperimental Configuration to Determine the Nonlinear Parameter β in PMMA and CFRP with the Finite Amplitude Methodes_ES

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Atribución 3.0 España
Except where otherwise noted, this item's license is described as Atribución 3.0 España