The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities
The objective of this thesis is to evaluate bender elements as a source and receiver of elastic waves in cohesionless sand. The techniques used to build the benders that are detailed include the use of an impedance analyzer to monitor changes in the electrical and mechanical response. Placing the...
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ndltd-LACETR-oai-collectionscanada.gc.ca-BVAU.2429-34522014-03-14T15:39:00Z The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities Jarvis, Kevin Donald Gibson The objective of this thesis is to evaluate bender elements as a source and receiver of elastic waves in cohesionless sand. The techniques used to build the benders that are detailed include the use of an impedance analyzer to monitor changes in the electrical and mechanical response. Placing the benders in a bucket of sand demonstrated the short compact nature of the bender waveform in both a shear and compressional wave orientation. An experiment in a non-homogeneous sandbox showed the change in shear waveform with separation of the elements. A Plexiglas cylinder with benders was used to measure changes in shear and compressional wave velocity as a function of confining pressure and the saturation with water and silicon oil. The effects of friction along the walls of the cylinder resulted in an unknown and irreproducible confining stress on the sand between the benders. An experiment to study the effect of silicon oil viscosity on shear modulus was inconclusive as a result of the unknown stress condition. The bender elements proved to be an excellent source and receiver of elastic waves in cohesionless sand. 2009-01-09T18:18:12Z 2009-01-09T18:18:12Z 1994 2009-01-09T18:18:12Z 1995-05 Electronic Thesis or Dissertation http://hdl.handle.net/2429/3452 eng UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/] |
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English |
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NDLTD |
description |
The objective of this thesis is to evaluate bender elements as a source and receiver of
elastic waves in cohesionless sand. The techniques used to build the benders that are detailed
include the use of an impedance analyzer to monitor changes in the electrical and mechanical
response. Placing the benders in a bucket of sand demonstrated the short compact nature of
the bender waveform in both a shear and compressional wave orientation. An experiment in a
non-homogeneous sandbox showed the change in shear waveform with separation of the
elements. A Plexiglas cylinder with benders was used to measure changes in shear and
compressional wave velocity as a function of confining pressure and the saturation with
water and silicon oil. The effects of friction along the walls of the cylinder resulted in an
unknown and irreproducible confining stress on the sand between the benders. An
experiment to study the effect of silicon oil viscosity on shear modulus was inconclusive as a
result of the unknown stress condition. The bender elements proved to be an excellent source
and receiver of elastic waves in cohesionless sand. |
author |
Jarvis, Kevin Donald Gibson |
spellingShingle |
Jarvis, Kevin Donald Gibson The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities |
author_facet |
Jarvis, Kevin Donald Gibson |
author_sort |
Jarvis, Kevin Donald Gibson |
title |
The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities |
title_short |
The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities |
title_full |
The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities |
title_fullStr |
The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities |
title_full_unstemmed |
The application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities |
title_sort |
application of piezoceramic bender elements to the laboratory measurement of elastic wave velocities |
publishDate |
2009 |
url |
http://hdl.handle.net/2429/3452 |
work_keys_str_mv |
AT jarviskevindonaldgibson theapplicationofpiezoceramicbenderelementstothelaboratorymeasurementofelasticwavevelocities AT jarviskevindonaldgibson applicationofpiezoceramicbenderelementstothelaboratorymeasurementofelasticwavevelocities |
_version_ |
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