TY - GEN
T1 - Non-uniformity of stresses within a sand specimen in triaxial shear
AU - Fu, Q.
AU - Hashash, Y. M.A.
AU - Ghaboussi, J.
PY - 2007
Y1 - 2007
N2 - Non-uniformity of deformations has always been a concern in interpretation of laboratory triaxial test results due to boundary effects. This paper describes the application of a relatively novel inverse analysis framework, SelfSim (Self learning simulations), which permits the extraction of relevant soil behavior using boundary measurements of load and displacement to triaxial compression tests with frictional ends on a sand specimen. Extracted soil behavior shows increased void ratio towards the middle of specimen. Soil elements along the central axis and mid-plane of the specimen do not experience principal stress rotation during shear while significant principal rotation is computed elsewhere in the soil specimen. The extracted soil behavior is used to interpret a range of mobilized internal friction angles under a variety of loading modes. The analysis provides greater insight into the sand behavior than the simple interpretation of behavior using global measurements of force and displacements.
AB - Non-uniformity of deformations has always been a concern in interpretation of laboratory triaxial test results due to boundary effects. This paper describes the application of a relatively novel inverse analysis framework, SelfSim (Self learning simulations), which permits the extraction of relevant soil behavior using boundary measurements of load and displacement to triaxial compression tests with frictional ends on a sand specimen. Extracted soil behavior shows increased void ratio towards the middle of specimen. Soil elements along the central axis and mid-plane of the specimen do not experience principal stress rotation during shear while significant principal rotation is computed elsewhere in the soil specimen. The extracted soil behavior is used to interpret a range of mobilized internal friction angles under a variety of loading modes. The analysis provides greater insight into the sand behavior than the simple interpretation of behavior using global measurements of force and displacements.
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M3 - Conference contribution
AN - SCOPUS:56249149288
SN - 0415440270
SN - 9780415440271
T3 - Proceedings of the 10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10
SP - 621
EP - 626
BT - Proceedings of the 10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10
T2 - 10th International Symposium on Numerical Models in Geomechanics NUMOG 10 - Numerical Models in Geomechanics NUMOG 10
Y2 - 25 April 2007 through 27 April 2007
ER -