No tension + PP material

[miladm2]

hi

i need some kind of material that model a soil behavior, i mean a material that be perfectly plastic in compression and doesn't have tensile strength. i tried Elastic-Perfectly Plastic Gap Material, but the script did not converge. then i tried Series Material and I used ENT + PP material, but i got same error. please help me :(:(:

[vesna]

Elastic-Perfectly Plastic Gap Material is the right one for you to use. To overcome convergence problems assign the same material in tension but assign very small stiffness (10e-10). If this does not solve your problem show me the warning messages you get from OpenSees.

[miladm2]

hi vesna

thanks a lot for your help i assigned same material in tension and the problem disappear :):)
wow, im really thankfullllllllll

[Behnoosh]

Hi,
I have the same problem but I want to have a tension only material, I couldn`t use the help. Would you please send me the codes that you used?
thank you.
leopard_sh87@yahoo.com

[linguan118]

something like this??
uniaxialMaterial ElasticPPGap 11 $E1 $fy 0.0; # Tension
uniaxialMaterial ElasticPPGap 22 -10e-10 [expr -0.1*10e-10] 0.0 # Compression
uniaxialMaterial Parallel 1 11 22