Stress Density Material

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This command is used to construct a multi-dimensional stress density material object for modeling sand behaviour following the work of Cubrinovski and Ishihara (1998a,b).

nDMaterial StressDensity $matTag $mDen $eNot $A $m $nu $a1 $b1 $a2 $b2 $a3 $b3 $fd $muNot $muCyc $sc $M $patm <$ssl1 $ssl2 $ssl3 $ssl4 $ssl5 $ssl6 $ssl7 $ssl8 $ssl9 $ssl10 $hsl $p1 $p2 $p3 $p4 $p5 $p6 $p7 $p8 $p9 $p10>
$matTag integer tag identifying material
$mDen mass density
$eNot initial void ratio
$A initial bulk modulus
$m overconsolidation ratio
$nu Poisson's ratio
$a1 peak stress ratio coefficient (etaMax = a1 + b1*Is)
$b1 peak stress ratio coefficient (etaMax = a1 + b1*Is)
$a2 max shear modulus coefficient (Gn_max = a2 + b2*Is)
$b2 max shear modulus coefficient (Gn_max = a2 + b2*Is)
$a3 min shear modulus coefficient (Gn_min = a3 + b3*Is)
$b3 min shear modulus coefficient (Gn_min = a3 + b3*Is)
$fd degradation constant
$muNot dilatancy coefficient (monotonic loading)
$muCyc dilatancy coefficient (cyclic loading)
$sc dilatancy strain
$M critical state stress ratio
$patm atmospheric pressure (in appropriate units)
$ssl1 void ratio of quasi steady state (QSS-line) at pressure $p1

The material formulations for the StressDensity object are "ThreeDimensional" and "PlaneStrain"


Code Developed by Saumyashuchi Das, University of Canterbury. Maintained by Chris McGann


General Information

This nDMaterial object provides the

Notes