Micromechanics of seismic wave propagation in granular materials

J. O'Donovan, S. Hamlin, G. Marketos, C. O'Sullivan, E. Ibraim, M. Lings, D. M. Wood

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

In this study high quality experimental studies on an analogue soil in a cubical cell are compared with discrete element simulations to investigate the propagation of waves through the soil sample from a grain-scale perspective. Examination of the data resulting from the two analyses confirms the complexity surrounding interpretation methods used for small-strain stiffness evaluation. Complex, but similar, responses to perturbations generated by bender/extender piezoceramic elements in experiments and controlled movement of particles in numerical simulations were observed. In both cases tests were repeated for a range of confining pressures and the system response was interpreted to give values of the shear and constrained moduli. At a given stress level, there was good agreement between the shear modulus values, however the laboratory test data gave higher constrained modulus values.
Original languageEnglish
Title of host publicationGeomechanics from micro to macro
Subtitle of host publicationproceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
EditorsKenichi Soga, Krishna Kumar, Giovanna Biscontin, Matthew Kuo
Place of PublicationLondon
PublisherCRC Press
Pages305-310
Number of pages6
Volume1
ISBN (Print)9781138027077
Publication statusPublished - 26 Aug 2014
EventInternational Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 - Cambridge, United Kingdom
Duration: 1 Sep 20143 Sep 2014
http://is-cambridge.eng.cam.ac.uk/

Conference

ConferenceInternational Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
CountryUnited Kingdom
CityCambridge
Period1/09/143/09/14
Internet address

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Cite this

O'Donovan, J., Hamlin, S., Marketos, G., O'Sullivan, C., Ibraim, E., Lings, M., & Wood, D. M. (2014). Micromechanics of seismic wave propagation in granular materials. In K. Soga, K. Kumar, G. Biscontin, & M. Kuo (Eds.), Geomechanics from micro to macro : proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 (Vol. 1, pp. 305-310). CRC Press. http://www.crcpress.com/product/isbn/9781138027077#