I am trying to vary shear and bulk moduli as a function of mean confining stress. I have a code for it that works in version 6 of FLAC3D but at the moment i need it for version 5.

for instance, 

model new

;set fish safe off

zone create brick point 0 0 0 0 point 1 -10 0 0 point 2 0 10 0 point 3 0 0 -10

zone cmodel assign elastic

zone property density 2300

;

model gravity 9.8

zone initialize-stresses

In the last line, how do i put the equivalent expresion in flac3d v5? zone initialize-stresses is not a valid command in this version. Anyone got an idea? thnaks in advance