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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.
|Title of host publication||Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014|
|Number of pages||6|
|Publication status||Published - 1 Jan 2014|
|Event||International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 - Cambridge, United Kingdom|
Duration: 1 Sep 2014 → 3 Sep 2014
|Conference||International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014|
|Period||1/09/14 → 3/09/14|
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- 1 Finished
1/11/09 → 1/05/13