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Rate Effects in the Superior Sand Model
This paper aims at analyzing the response of the elasto-viscoplastic model Superior sand proposed by Boukpeti et al. for describing rate effects in undrained loading of loosely-packed granular deposits. The equations governing the model in triaxial compression are solved for three loading histories: constant strain rate, constant stress rate, and creep. The resulting stress-strain-time curves are discussed in the light of material instability states in relation to static liquefaction. It is shown that the classical second-order work rate instability criterion is no longer valid, and a new criterion based on the deformation acceleration is presented.
Rate Effects in the Superior Sand Model
This paper aims at analyzing the response of the elasto-viscoplastic model Superior sand proposed by Boukpeti et al. for describing rate effects in undrained loading of loosely-packed granular deposits. The equations governing the model in triaxial compression are solved for three loading histories: constant strain rate, constant stress rate, and creep. The resulting stress-strain-time curves are discussed in the light of material instability states in relation to static liquefaction. It is shown that the classical second-order work rate instability criterion is no longer valid, and a new criterion based on the deformation acceleration is presented.
Rate Effects in the Superior Sand Model
Boukpeti, Nathalie (author) / Mróz, Zenon (author) / Drescher, Andrew (author)
First Japan-U.S. Workshop on Testing, Modeling, and Simulation ; 2003 ; Boston, Massachusetts, United States
Geomechanics ; 123-135
2005-03-18
Conference paper
Electronic Resource
English
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