Generalized Hill Model in Workbench?

- June 25, 2019 at 1:19 am
  
  PureInsanity
  Subscriber
  
  I am trying to translate data from APDL code to ANSYS workbench to define a material. The code defines with a generalized Hill but I cannot find any option in the toolbar. Generalized hill defines each of these stress ratios from C1 to C6. What do I do?
- June 25, 2019 at 6:16 am
  jj77
  Subscriber
  See the help manual for rate independent plast. and generalized Hill. In that example there is some code (below modified using matid, for workbench,, of course you need to understand and find out what material constants to use. Also look on this post/tutorial how to add material models to workbench:
```
! Define generalized Hill model

/prep7
```
```
/prep7

MP,EX,matid,2.0E5                   ! ELASTIC CONSTANTS

MP,NUXY,matid,0.3



TB,BISO,matid,1,,1                  ! Hardening and reference s

TBTEMP,0

TBDATA,1,300,0                  ! Can also BISO or BKIN



TB,HILL,matid

TBTEMP,0                        ! HILL TABLE

TBDATA,1,1.0,1.1,0.9,0.85,0.9,0.80
```
```
https://www.youtube.com/watch?v=A0NNXrV42HI
```
- June 26, 2019 at 2:20 pm
  
  PureInsanity
  Subscriber
  
  Much appreciated with this tutorial, but I have come to problem with the script:
  
  ANSYS mechanical read an unknown error and directed me to check the Solver Output. It turns out that there is a line that says
  
  "The number of temperature specifications exceeds the maximum of 1 for material number 1. The TBTEMP command is ignored. "
  
  I have inputted multiple temperature specifications because I am doing a thermal analysis. What should I do?
- June 26, 2019 at 2:45 pm
  
  jj77
  Subscriber
  
  As I said never used this, and the example I showed works, but that has only one temp. So it looks like you can not have more than that according to the message. Perhaps some of the Ansys guys has some more input.
- June 26, 2019 at 3:17 pm
  
  jj77
  Subscriber
  
  I looked in the manual and one needs to increase ntemp in the tb command. So I did that and this works (2 temp.)
  
  /prep7
  
  MP,EX,matid,2.0E5 ! ELASTIC CONSTANTS
  
  MP,NUXY,matid,0.3
  
  TB,BISO,matid,1,,1 ! Hardening and reference s
  
  TBTEMP,0
  
  TBDATA,1,300,0 ! Can also BISO or BKIN
  
  TB,HILL,matid,2
  
  TBTEMP,22 ! HILL TABLE
  
  TBDATA,1,1.0,1.1,0.9,0.85,0.9,0.80
  
  TBTEMP,100 ! HILL TABLE
  
  TBDATA,1,0.9,1,0.8,0.85,0.9,0.80
- June 26, 2019 at 5:02 pm
  
  PureInsanity
  Subscriber
  
  worked like a charm. thanks!
- June 26, 2019 at 5:04 pm
  
  jj77
  Subscriber
  
  Noworries. More thanwelcome.