Learning Forum

[Amin]

Hi, 

I am doing a numerical analysis using ANSYS workbench 15.0

The model contain 130 concrete body, 160 steel bars, and about 300 contact elements between the bodies. 

To select SOLID65, or LINK180 in ANSYS workbench it must use command objects.

1- Because of the high number of elements, It takes a while to input the material properties for all elements.

I want to ask, How can I use an APDL code to assign the material properties for all concrete elements only at once and also for the Steel elements. (For example, how to select all the concrete bodies through command then assign the material properties of concrete, after,  select all steel bars and assign to them the material  properties of steel, and the same things for contacts)

2- Sometimes, when I solved the model ANSYS recommended to switch the solver to unsymmetrical, Knowing that I am using a Static Analyses and this solver type does not exist in Workbench, only Direct and Iteration solvers exist in Solver Type.

How can I select the Unsymmetrical solver?

3- The above message (unsymmetrical solver) appears when I use the frictional contact type with a friction coefficient greater then 0.2

I would like to know, why ANSYS recommended a friction coefficient less or equal to 0.2 and didn't allow a higher value?

[jpasquerell]

1. Make a unique named selection for each group of bodies that have the same mat properties.  insert a command object that runs prior to the solve with these commands

fini

/prep7

use *get to get the max defined material  into mpnum

! repeat for each material

cmsel,s,bod001 ! selects the applicable elements

add 1 to mpnum

! issue MP and TB commands for the properties using id of mpnum

emod,all,mat,mpnum

! repeat for other named selections

allsel

fini

/solu

 

2. see eqslv command - it can be in a separate command object prior to solve or added to the one that defines the material props.

3. check the help. it may be based on a developer consensus where models seem to fail to solve.

  

 

[Amin]

Hi jpasquerell,

Thank you your reply. I hope you can give me an example of how to do it