APDL Command to Export Specific Nodal Stress Values

[james.lee]

Apologies if this is the incorrect area to post the following, this is my first post.

I would like to export an array of nodal principal stress values to a text file and have created the following APDL command to do so:

The problem is my output file contains values that do not reflect those in the relevant contour plots and associated exported text files:

I have tried several options with the *VGET and *GET commands to no avail. Could someone point ime in the right direction as I am not overly familiar with APDL command references.

[Erik Kostson]

Hi

These example shows some different ways of doing this.

https://www.ansystips.com/2017/10/ansys-apdl-some-neat-commands.html

All the best

Erik

[james.lee]

Thank you Erik, much appreciated.

[SaiD]

Hello,

Based on Table 244 in in this Ansys Help link: *VGET you can see that when using Item1=S, ENTNUM has to be a node number. I am not sure what happens when it is left empty. My guess is that it defaults to node 1 and it keeps looping till the array 'Principal' is filled up. Could you check if the values printed in FLS1_1.txt match with the principal stress values for node 1 to 4?

[james.lee]

Hi, you are correct, the stress values reported appear to be associated with node 1 to 4. Is it possible to associate the selected nodes with the VGET command? I have updated the script to reflect the nodes selected but am only able to output zero values in the text file:

Your assistance is much appreciated.

[SaiD]

Hello, 
Maybe you can try looping over the selected set of nodes using the *DO command and use *GET command to retrieve the principal stress values for each node in the set.

! Loop over selected nodes
*DO, i, 1, numNd
*GET, nnum, NODE, 0, NXTH ! Get the next node number
! Perform operations on the node
*ENDDO