Abstract :
In this research, effect of strain rate on the albany sand has been studied by elastic visco-plastic constitutive model within the three component framework. Strain rate effect can be modeled by using any one of the (i) isotach, (ii) tesra (temporary effects of strain rate and acceleration) or viscous evanescent and (iii) p & n (positive and negative viscosity), models of the three component framework. Usually “isotach†is appropriate for clay and soft rock, “tesra†is appropriate for sand and “p & n†is appropriate for sand with less angularity like albany sand. Here in this research triaxial compression (tc) tests results of albany sand at different strain rate has been modeled successfully into a commercially available package called “abaqusâ€. The p&n model was implemented into a generalized elasto-plastic isotropic strain-hardening non-linear model in C++. The model is then embedded in the finite element computer program abaqus. Abaqus was used for the actual analysis.
Keyword :
Constitutive Law, Numerical Simulation ,Three Component Framework, P&N Model, Elasto-Plastic Model, UMAT