The present work attempts to simulate and analyze the mechanical behavior of block-in-matrix (BIM) colluvial materials using virtual specimens. This study carried out a series of numerical simulation as virtual mechanical tests in order to look into the important factors that affect the mechanical properties of BIM colluvium. It was found that (1) the strength of BIM colluvium increases with increasing block proportion, (2) rock-block orientation affects the anisotropy of mechanical properties, raising confining pressure reduces the anisotropy, and (3) the rock-block aspect ratio has a minor influence on the mechanical behavior/properties. The effect of specimen size on the mechanical behavior/properties of BIM colluvium was also evaluated. It was shown that the variation of mechanical behavior tends to converge as the specimen size approaches to a representative elemental volume (REV). Due to the inevitable difficulties in obtaining colluvium specimens close to the REV for laboratory tests, it may be possible to adopt virtual mechanical tests to complement insufficient data of laboratory tests, provided an appropriate calibration can be made.
|State||Published - 1 Dec 2008|
|Event||42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium 2008 - San Francisco, CA, United States|
Duration: 29 Jun 2008 → 2 Jul 2008
|Conference||42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium 2008|
|City||San Francisco, CA|
|Period||29/06/08 → 2/07/08|