TY - GEN
T1 - The influence of macropores on strength and mode of failure of square specimens 2D numerical simulation and experimental validation
AU - Jespersen, Colleen
AU - Spence, Randy
AU - MacLaughlin, Mary
AU - Parkhurst, Jesse
AU - Hudyma, Nick
PY - 2008
Y1 - 2008
N2 - This study attempts to quantify the effects of macropore spacing on failure mode and engineering properties of rock material. Changes in the unconfined compressive strength, elastic modulus and mode of failure of 4" square specimens with circular holes are investigated using 2D numerical simulations (FLAC and Phase2) and from approximately forty unconfined compression tests on 4" cubic specimens of synthetic material (HydrocalTM, a high-quality plaster). Cubic specimens have cylindrical "tunnels" extending through the cubes. Results show that as the center-to-center spacing is increased between holes, the unconfined compressive strength increases and failure mode changes from tensile to shear. During failure of specimens with holes in the minimum center-to center spacing configuration, the individual holes act as a single void. Results at the minimum center-to-center hole spacing show a low unconfined compressive strength and tensile failure. The maximum spacing between inclusions results in relatively high peak strengths and shear failure.
AB - This study attempts to quantify the effects of macropore spacing on failure mode and engineering properties of rock material. Changes in the unconfined compressive strength, elastic modulus and mode of failure of 4" square specimens with circular holes are investigated using 2D numerical simulations (FLAC and Phase2) and from approximately forty unconfined compression tests on 4" cubic specimens of synthetic material (HydrocalTM, a high-quality plaster). Cubic specimens have cylindrical "tunnels" extending through the cubes. Results show that as the center-to-center spacing is increased between holes, the unconfined compressive strength increases and failure mode changes from tensile to shear. During failure of specimens with holes in the minimum center-to center spacing configuration, the individual holes act as a single void. Results at the minimum center-to-center hole spacing show a low unconfined compressive strength and tensile failure. The maximum spacing between inclusions results in relatively high peak strengths and shear failure.
UR - http://www.scopus.com/inward/record.url?scp=84868613528&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84868613528
SN - 9781622762514
T3 - 41st Symposium on Engineering Geology and Geotechnical Engineering 2008
SP - 37
EP - 48
BT - 41st Symposium on Engineering Geology and Geotechnical Engineering 2008
T2 - 41st Symposium on Engineering Geology and Geotechnical Engineering 2008
Y2 - 9 April 2008 through 11 April 2008
ER -