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Elastic Properties - Coggle Diagram
Elastic Properties
Visco-Elastic
exhibit both elastic and viscous behaviors when stress applied
elasticity results in an instantaneous strain
only when the Apply Viscous Properties
viscosity results in a time-dependent strain rate
Three types of Visco-Elastic models are available in RS2
Maxwell, Burgers, and Standard
Orthotropic
material has properties which vary with direction
elastic properties are specified in THREE orthogonal directions
three Young's moduli are required
E1, E2 and Ez
Three separate Poisson’s ratios
n12, n1z and n2z
Basic Software Parameters
Young’s Modulus (E)
Poisson’s Ratio (ν)
Shear Modulus (G)
Duncan-Chang Hyperbolic
capable of modeling the non-linear
can only be used in conjunction with the Mohr-Coulomb failure criterion in RS2.
input parameters
Modulus Number (Ke
Modulus Exponent (n)
Unloading Modulus Number (Ku)
Failure Ratio (Rf)
Atmospheric Pressure (Patm)
Poisson's Ratio (v)
Bulk Modulus Number (Kb)
Bulk Modulus Exponent (m)
Isotropic
single value of Young’s Modulus and a single value of Poisson’s Ratio.
Same behavior in all directions
Transversely Isotropic
properties which vary with direction
Different stiffness in different directions
Custom
allows users to define their own elastic property model
six Custom Mode options
Custom P - mean effective stress
Custom q - scalar deviatoric stress
Custom S3 - min effective principal stress
Custom u - pore pressure
Custom EpsV - volumetric strain
Custom Gamma - scalar deviatoric strain
Overview
Define Material Properties dialog
Isotropic
Transversely Isotropic
Orthotropic
Duncan-Chang Hyperbolic
Non-linear Isotropic
Visco-Elastic
Non-linear Isotropic
can now be modeled using one of three different non-linear elastic models