Learning Forum

[Koen_Franse]

Hi, nI've build a model in Mechanical, exported an input file for this and now I'm trying to solve it with APDL. The model solves correctly in APDL, since the displacements are as I expect. However, I cannot seem to export the correct stress/ strain results to a text file. I added the following lines to the end of my input file for exporting:nn /post1n *get,numnode,node,,countn *cfopen,'myfile','txt'n *vwrite,'Node num','x_coor','y_coor','z_coor','VMS'n (A8,X,A8,X,A8,X,A8,X,A8)n *DO,i,1,numnoden *get,xi,node,i,loc,xn *get,yi,node,i,loc,yn *get,zi,node,i,loc,zn *get,VMSi,node,i,s,eqvn *vwrite,i,xi,yi,zi,VMSin (F8.0,X,E13.6,X,E13.6,X,E13.6,X,E13.6)n *ENDDOn *cfclosennThe node coordinates are correct in the text file. Besides, if I export the displacement in this manner this also works. But as soon as I try to get stress/strain results, the output in the txt file is 0.788861E-30 (aka zero). the error file says the following for all nodes:nn Requested data is not stored for node 18322. n Line= *GET, VMSi, node, i, s, x n The *GET command is ignored. nn I read on some other pages that this could be because I'm using mid-side noded elements (SOLID186), and by default the stress/strain results are not stored for the mid-side nodes. I found that this could be solved by adding /EFACET,2 to my input file (before the solve command), but unfortunately this also doesn't work. Anyone knows how to fix this?nThanks in advance!nn

[Ashish Khemka]

nnTo get the result at mid-side nodes, please check if the Powe Graphics is ON. You can use the following command syntax:nn/post1n/graphics,powern/efacet,2nprnsol,s,prinnnHope this helps.nnRegards,nAshish Khemkan

[Koen_Franse]

Hi Array,nThanks for your reply. Unfortunately this doesn't solve the problem; I added the three lines under the /post1 command, but still all the stresses give the value 0.788861E-30 . Furthermore now the warning  The requested S data is not available. The PRNSOL command is ignored. appears at the top of the error script. So somehow there is still no stress data available at the nodes.Furthermore I have these two warnings on top of my error file, but I did not expect that they had something to do with not being able to see the stress results.nn *** WARNING ***             CP =    3.359  TIME= 10:13:24n Element shape checking is currently inactive. Issue SHPP,ON or     n SHPP,WARN to reactivate, if desired.                   nn *** WARNING ***             CP =    3.703  TIME= 10:13:26n Material number 2 (used by element 8163) should normally have at least  n one MP or one TB type command associated with it. Output of energy by  n material may not be available.nnDo you have any other suggestions to fix my problem?n

[永辉 王]

Hello, have you solved your problem? I had the same problem. I used unit SOILD186. When batch processing was used, node strain could not be extracted as a result. I still don't know how to solve it. I hope I can get help.Thanks.