How to output stress/strain/displacement on a cross section?

[ouyang]

Hi everyone,
I am learning opensees. I would like to output stress/strain/displacement on a cross section for Brick8N_u_p_U element.
I have tried it for a while but still don't know how to do that.
I appreciate your help. Thanks a lot.

Ouyang
The following is the example tcl input file.

model BasicBuilder -ndm 3 -ndf 7
set p 1.667
set np -6.667
set g 9.81
set lf1 1.0
node 1 1.0 1.0 0.0
node 2 0.0 1.0 0.0
node 3 0.0 0.0 0.0
node 4 1.0 0.0 0.0
node 5 1.0 1.0 2.0
node 6 0.0 1.0 2.0
node 7 0.0 0.0 2.0
node 8 1.0 0.0 2.0
fix 1 1 1 1 1 1 1 1
fix 2 1 1 1 1 1 1 1
fix 3 1 1 1 1 1 1 1
fix 4 1 1 1 1 1 1 1
fix 5 0 0 0 0 1 1 1
fix 6 0 0 0 0 1 1 1
fix 7 0 0 0 0 1 1 1
fix 8 0 0 0 0 1 1 1
nDMaterial ElasticIsotropic3D 1 70000 0.3 1.8
element Brick8N_u_p_U 1 5 6 7 8 1 2 3 4 1 0.0 0.0 -9.81 0.8 1.0 1.8 1.0 10e-5 10e-5 10e-5 10e5 10e5 0
set Series "Path -filePath NR228.txt -dt 0.005 -factor 1"
pattern UniformExcitation 1 3 -accel $Series
#recorder Element -file stress_strain.out -time -ele all gausspoint
integrator Newmark 0.55 0.2756
numberer RCM
constraints Penalty 1e15 1e15
test NormDispIncr 2.0e-5 20 1
algorithm Newton
numberer RCM
system SparseGeneral
analysis Transient
analyze 1000 0.04
wipe

[silvia]

you might want to look the material up in the manual and see if stress-strain is an option in the recorder. also, you might want to contact the authors of the material (contact given in the documentation) for more on that.