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Ultrasonic material characterization using large-aperture PVDF receivers.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Adamowski, Julio Cezar Buiochi, Flávio Higuti, Ricardo Tokio |
| Copyright Year | 2010 |
| Abstract | This work describes the use of a large-aperture PVDF receiver in the measurement of liquid density and composite material elastic constants. The density measurement of several liquids is obtained with accuracy of 0.2% using a conventional NDE emitter transducer and a 70-mm-diameter, 52-microm P(VDF-TrFE) membrane with gold electrodes. The determination of the elastic constants is based on the phase velocity measurement. Diffraction can lead to errors around 1% in velocity measurement when using alternatively the conventional pair of ultrasonic transducers (1-MHz frequency and 19-mm-diameter) operating in through-transmission mode, separated by a distance of 100 mm. This effect is negligible when using a pair of 10-MHz, 19-mm-diameter transducers. Nevertheless, the dispersion at 10 MHz can result in errors of about 0.5%, when measuring the velocity in composite materials. The use of an 80-mm diameter, 52-microm-thick PVDF membrane receiver practically eliminates the diffraction effects in phase velocity measurement. The elastic constants of a carbon fiber reinforced polymer were determined and compared with the values obtained by a tensile test. |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.ultras.2009.09.018 |
| Alternate Webpage(s) | http://www.lus.poli.usp.br/file/Adamowski_Ultrasonics_2009.pdf |
| PubMed reference number | 19853269 |
| Alternate Webpage(s) | https://doi.org/10.1016/j.ultras.2009.09.018 |
| Journal | Medline |
| Volume Number | 50 |
| Issue Number | 2 |
| Journal | Ultrasonics |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
