; Uniaxial test of strain-softening material
title
Uniaxial test of strain-softening material
gen zone cyl p0 0 0 0 p1 1 0 0 p2 0 4 0 p3 0 0 1 size 12 30 12
gen zone reflect norm 1,0,0
gen zone reflect norm 0,0,1
model ss
pro den 2500 bulk 2e8 she 1e8 co 2e6 fric 45 ten 1e6 dil 10
pro ftab 1 ctab 2 dtab 3
table 1 0 45 .05 42 .1 40 1 40
table 2 0 2e6 .05 1e6 .1 5e5 1 5e5
table 3 0 10 .05 3 .1 0
fix x y z range y -.1 .1
fix x y z range y 3.9 4.1
ini yvel 2.5e-5 range y -.1 .1
ini yvel -2.5e-5 range y 3.9 4.1
def ax_str
str = 0
pnt = gp_head
loop while pnt # null
if gp_ypos(pnt) < 0.1 then
str = str + gp_yfunbal(pnt)
endif
pnt = gp_next(pnt)
endloop
ax_str = str / pi ; cylinder radius = 1
end
hist n 1
hist gp ydisp 0,0,0
hist ax_str
hist gp xdisp 1,1,0
plot hist -2 vs 1 ;axial stress vs axial disp.
step 5000
save beforeplzones.sav
; Plot of plastic region as zones with strain > 0.2
def ShowPlasticZones
zp = zone_head
loop while zp # null
if z_prop(zp,’es_plastic’) > 0.2
z_group(zp) = ’yield’
else
z_group(zp) = ’other’
endif
zp = z_next(zp)
endLoop
end
ShowPlasticZones
plo crea qqq
plo add surf red range group yield
plo add axes green
plo set rot 123 313 3
plo set mag 1.5
ret