Search found 1283 matches

by HarryvL
Wed Mar 27, 2024 5:46 pm
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

Same model but finer mesh? Can you share the mesh settings? According to the fcVM panel the maximum CSR in the integration points is 4.329. This is also what the load-CSR plot shows. The ResultMechanical panel shows a maximum nodal value of 8.07. This is higher because of the extrapolation from inte...
by HarryvL
Wed Mar 27, 2024 2:35 pm
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

I updated the ResultMechanical object to display Critical Strain Ratio [-] instead of Temperature [K] when the fcVM workbench is installed.
by HarryvL
Wed Mar 27, 2024 2:29 pm
Forum: Python scripting and macros
Topic: SOLVED - imported modules not in sys.modules
Replies: 1
Views: 96

SOLVED - imported modules not in sys.modules

I see what the issue is. The sys.modules entry is femtaskpanels.task_result_mechanical and not task_result_mechanical. So this works as expected:

Code: Select all

femtaskpanels.task_result_mechanical in sys.modules.keys() #True
by HarryvL
Wed Mar 27, 2024 10:06 am
Forum: Python scripting and macros
Topic: SOLVED - imported modules not in sys.modules
Replies: 1
Views: 96

SOLVED - imported modules not in sys.modules

Hi, I am reviewing the behaviour of the FEM ResultMechanical object and am puzzled by the absence of the task_result_mechanical module in sys.modules after import in view_result_mechanical.py. I inserted the following code in view_result_mechanical.py import FreeCADGui from PySide import QtGui from ...
by HarryvL
Mon Mar 25, 2024 9:50 am
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

I have updated fcVM to export nodal stress and strain values for display in the ResultMechnical object. Because stresses and strains are calculated in the integration points , this involves an extrapolation step. I previously averaged the extrapolated values of all connected elements to a particular...
by HarryvL
Tue Mar 19, 2024 1:02 pm
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

I can show that for von Mises plasticity (where the volumetric plastic strain increment equals zero), the two definitions are equivalent: . PEEQ comparison.png . please keep in mind that eps_xy =eps_yx, etc. when comparing this last result with the CCX / fcVM / Abaqus formula. However, I still don't...
by HarryvL
Tue Mar 19, 2024 10:14 am
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

... and Abaqus uses the same definition (http://130.149.89.49:2080/v2016/books/u ... bmetalplas):

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Screenshot from 2024-03-19 11-11-25.png
Screenshot from 2024-03-19 11-11-25.png (54.23 KiB) Viewed 505 times
by HarryvL
Tue Mar 19, 2024 8:51 am
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

In CCX and fcVM, an increment of PEEQ is calculated as follows: . PEEQ.png . with summation over ij. This is short-hand for: eps_ij eps_ij = eps_x^2+eps_y^2+eps_z^2+eps_xy^2+eps_yz^2+eps_zx^2+eps_yx^2+eps_zy^2+eps_xz^2). For the tensile test (where at failure eps_x=eps, eps_y=eps_z=-0.5eps and the s...
by HarryvL
Mon Mar 18, 2024 1:06 am
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

I do not really understand the triaxiality concept. When doing a hand calculation (with stress/strain tensors at yellow "X") I get a very low triaxiality, as to expect, nearly pure shear. PEEQ is 5%, analog to IdeaStatica the plastic limit is reached. In the end I get a epsilon_cr of 32%....
by HarryvL
Sun Mar 17, 2024 7:35 pm
Forum: FEM
Topic: fcVM workbench
Replies: 90
Views: 6672

Re: fcVM workbench

I do not really understand the triaxiality concept. When doing a hand calculation (with stress/strain tensors at yellow "X") I get a very low triaxiality, as to expect, nearly pure shear. PEEQ is 5%, analog to IdeaStatica the plastic limit is reached. In the end I get a epsilon_cr of 32%....