Stuck? 
support@mecway.com
support@mecway.com
Mecway
FEA
disla
About
- Username
- disla
- Joined
- Visits
- 1,795
- Last Active
- Roles
- Member
Comments
-
If you try this method refine enough the shells and check stresses in the area to discard any shell shear locking that could change the hyper elastic behavior.
-
Hi mbeauvais, I would create a very thin and soft (E=0.01 Pa) shells to cover the holes. Those shells could provide the area if the nodes are merged with the main body. By other hand, if the thickness of that shell is known and is very thin, perime…
-
Hi, This is how I have engaged the two gears. Mesh is very raw and model is not completed to keep it below 1000 nodes but it contains all the elements to show how I would do the set up. It runs in 30 sec. Notes. This is the nonlinear option wher…
-
It has been 4 years since this post was published. I,m working on the validation but meanwhile, numbers seem reasonable. Gears are fully shells so I think I will manage to get a <1000 nodes file to share. <img src="https://mecway.com/foru…
-
Hi Mike and thanks for your comment. I started again from Andrea file and one additional refinement makes the big difference. @Andrea. I have set up the whole model as Compression only and everything keeps below 0.02 MPa. If I set only the Arch…
-
I found your problem. You have not defined the element selection called ARCH. Your custom model ELSET is pointing to nowhere. Maybe Victor can take a look at this as it should fail and it is not. Take into consideration these are kind of tricky t…
-
Weight and reactions are very close too. It think it will get better with some refinement. You can create a New table in solution. Check in the manual.
-
1-Ccx Manual: The correction term is in fact identical to the term used to cut off tensile stresses for penalty contact in Equation(203) and Figure (130). Replacing “overclosure” and “pressure” by “principal strain” and “principal stress” in that fig…
-
Could you share your final set up ? It will be easier to follow.
-
Good question. Don’t know sorry. For questions more related with the theory involved you better ask at the Calculix forum directly. There are real experts there who can give you an answer or address you to some book or paper related with the subjec…
-
You can do that easy defining a load table. When Nonlinear Quasistatic analysis is active, loads can be entered as a function of time by means of a function or a table. Wait some seconds before activating the pressure load. You have a lot of possibl…
-
The custom model definition, custom Step, Custom element,.... are used to include in the .inp file that MECWAY prepares and send to the solver (Calculix), commands and functions that are still not available directly in the MECWAY GUI. They do not wo…
-
It works for me adding the named selection call "Arch." By your description seems your analysis is running but not converging. That's a different problem. Check the time settings in Nonlinear. Regarding the number of nodes, I would try symmetry if …
-
I think it is possible with custom model definition, calculix and nonlinear. Line load doesn't work . Find example with random material properties for a compression only arch. You need to erase the material on the main tree to avoid conflict. Check…
-
.
-
Hi, As a continuation of the previous example, I have completed another test in which I reviewed the response of the friction parameter in the contact BC. It performs very well, and the pressed plate has shown to slip/release at the expected value.…
-
Hi AndreaC91, Mmartin has a nice example with only compression and very similar to yours in the forum. Clay arch simulation https://mecway.com/forum/discussion/1089/clay-arch-simulation Be careful , I have seen some nodes disconnected on the lowe…
-
In the same line as @Sergio and regarding the buttons position, I would suggest moving the run analysis button farther from the save button. I have accidentally end up re-running a long analysis instead of saving the results many times.
-
EDITED. 23/05/2022 Another Validation File. Static and Nonlinear Quasi-Static Analysis of Cantilever Plate. I’m looking at Stresses and through thickness Shear Stress in the shell. To obtain through thickness stress and shear detail in the shell …
-
Thank you very much cwharpe. This is very simple to implement in an Excel file.
-
Problem 8 Nonlinear Bending of an Isotropic Plate. Validation File. Thin shells shows important Locking for small mesh density (4x4). Acceptable results for displacements starts after the first refinements. Compared with the Analytical solution an…
-
Hi Victor , You are right ..., in build shape functions are probably the natural way. I will look your code in detail. Thank you very much
-
Hi, Mishal, Not sure if this is what you are looking for, but Cornelius provided an API Script that computes the "Sum forces over a given set of nodes"
-
Thanks for your comments @prop-design “3) can't define element orientation for solids. it's locked to global xyz. so even though ccx uses solids for composites, you can't actually make and run a solid model yourself “ Solid Element orientation acc…
-
Victor, ¿would it be possible to modify the parameter that scales the "Open cracks" separation. I think this way the user could adjust the required space to see in between the composite layers.
