Experimental investigation and numerical modeling of piezoelectric bender element motion and wave propagation analysis in soils
| Autor: | Hongwei Liu, Pooneh Maghoul, Giovanni Cascante, Ahmed Shalaby |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
engrXiv|Engineering|Civil and Environmental Engineering|Civil Engineering
Materials science Strain (chemistry) bepress|Engineering Wave propagation Numerical modeling Motion (geometry) Mechanics bepress|Engineering|Civil and Environmental Engineering|Civil Engineering Geotechnical Engineering and Engineering Geology Piezoelectricity Characterization (materials science) engrXiv|Engineering bepress|Engineering|Civil and Environmental Engineering engrXiv|Engineering|Civil and Environmental Engineering|Geotechnical Engineering Soil water engrXiv|Engineering|Civil and Environmental Engineering Element (category theory) bepress|Engineering|Civil and Environmental Engineering|Geotechnical Engineering Civil and Structural Engineering |
| Zdroj: | Canadian Geotechnical Journal. 59:330-341 |
| ISSN: | 1208-6010 0008-3674 |
| Popis: | The bender element (BE) test has been widely used for the characterization of soil specimens to determine the dynamic or low-strain shear modulus. However, the actual behavior of the BE inside the soil specimen still remains unknown. The current ASTM standard does not consider the interference of P waves in BE measurements, which can lead to significant errors in the evaluation of shear wave velocities. In this paper, the BE motion inside different media is numerically studied through a coupled piezoelectric and solid mechanics finite element (FE) model. The numerical results are calibrated and compared with the real motion of the BE monitored using a high-frequency laser vibrometer. The proposed model successfully captured the measured motion of the BE in the air as well as transparent soils.More importantly, the proposed model provided a method for understating the interactions of P waves and S waves in a soil specimen. Simulated signals for an Ottawa sand specimen showed a good agreement with independent results from resonant column tests. The proposed piezoelectric-solid mechanics FE model can be used to study the soil-bender element interaction so that sound recommendations can be given to improve the interpretation of BE tests for different soils. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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