How to insert the compressive and tensile stress - strain curve for concrete in Ansys APDL?
Regards,
G.Velrajkumar
You may try to use the command TB to define a data table for material properties.
I use the Multilinear Isotropic Hardening Model to define a stress-strain curve.
Check the following links for more information.
https://www.sharcnet.ca/Software/Ansys/16.2.3/en-us/help/ans_cmd/Hlp_C_TB.html
https://www.sharcnet.ca/Software/Ansys/16.2.3/en-us/help/ans_mat/amp8sq21dldm.html#miso
Hi,
I have used TB commands in identifying material properties(stress and strain) for steel structures, as below. I hope you can get hint to apply it for concrete structures too.
TBTEMP,,STRAIN
TBDATA,,0.001724,0.0149,0.0253,0.0556,0.131,0.16
TBTEMP,0
TBDATA,,344700000,350000000,382200000,449200000,506200000,508400000
Dear Sir,
You can easily insert curves for concrete using Drucker-Prager concrete model.
For instance:
/prep7
! ELASTIC CONSTANTS
MP,EX,1,20.0E9
MP,NUXY,1,0.2 ! Base Drucker-Prager concrete Rc=30.0E6 ! uniaxial compressive strength
Rt=3.0E6 ! uniaxial tensile strength
Rb=36.0E6 ! biaxial compressive strength delta_t=0.25 ! dilatancy factor tension
delta_c=1.0 ! dilatancy factor compression ! COMPRESSION
kappa_cm=0.0025-Rc/20.0E9
kappa_cr=0.0025
omega_ci=0.33
omega_cr=0.1
!TENSION
kappa_tr=0.0005
omega_tr=0.2 TB,CONCR,1,,,DP
TBDATA,1,Rc,Rt,Rb TB,CONCR,1,,,DILA
TBDATA,1,delta_t,delta_c TB,CONCR,1,,,HSD6
TBDATA,1,kappa_cm,kappa_cr,omega_ci,omega_cr,kappa_tr,omega_tr
This model has good convergence rate and agreement with experimental results.
https://www.sharcnet.ca/Software/Ansys/17.0/en-us/help/ans_mat/mat_geomechanics.html
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