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Thanks’ Victor and ConelisP, I will follow the code in detail. Seems to me it opens a whole set of new options. I think I could remove Displacement BC too by deleting the constrained elements once they do what I need. Thank you very much again. N…
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Thank you very much in advance CornelisP. I will open a new Post as it could be a useful procedure to someone else. I will call it "MODEL CHANGE- CONTACT PAIR, REMOVE/ADD"
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Hello Lorenzo, This happens when there are large models with very small details on it like the half coupling and its internal lip.See image. Read suggestions carefully. point 3) “avoid small radius, chamfers or holes that will not affect the ove…
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Thanks for your comments JohnM. I reproduced those two video tutorials some days ago. My post is the direct application of the first one with “real world numbers” to check its performance. The reason for displacement functions is that if you find…
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Form-finding-Sail shape. [JMF] Perimetral steel it's being crucial to keep some initial tension and make it converge. Wrinkles may develop at the lower edges too. Runs in about 5 min with Pastix. ccx 2.19 is required. Thanks for your inspiring e…
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@cwharpe It works. Great !! So we have a generalized method for any load function in any direction and it can be used with the internal solver and all its beam sections. Really Nice. Thank. Regarding direction cosines, once you discover quaterni…
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I have reproduced a study case from ANSYS forum to help me better understand how contact works. Seems ANSYS can automatically adjust Contact Stiffness to reach a desired Contact Clearance. I have done it manually to be <than 10-6. All the detail…
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HI StefanH, The problem could be solved using some algebra but once applied it is difficult to make it work because line pressure as a function of position is not a follower or doesn’t work to me on Beams. If you want to try modelling with solids o…
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@JohnM Those numbers started to appear automatically with each update of the OneAPI toolkit. EDITED: I managed to make ccx_dynamic.exe v2.18 to work. I added the route to all the drivers into the system variables path and change the name of mkl_i…
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AMD Ryzen 9 5900HX 8 cores Laptop. MEMORY: 16GB 3200MHz calculix_2.19\ccx_static.exe MKL_INTERFACE_LAYER=LP64 MKL_THREADING_LAYER=INTEL OMP_NUM_THREADS = [8] OPENBLAS_NUM_THREADS =[1] PASTIX_MIXED_PRECISION = [1] Pastix --Bolt Assembly Test.liml…
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You are right. Green dots are hydrostatic and normal pressure arrows. Model simplify as soon as I press any mouse button and move it. I have switched mouse buttons in the options menu and now keeping pressure on the right button when zooming has …
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Yes, you read my mind. I think the "REF" node is still there but rigid body and shell elements ...mmhh, not yet...and if I convert them to solids the model had more than 1.000 nodes. AlexJagow could give it a try for sure.
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Thank you very much Sergio, The transform Card is new for me and it works perfectly. I wasn’t able until today to apply a radial displacement properly. How I feared the most tricky part is that adjustment to set the Rubber in place again and out of…
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Thanks Sergio, You are right. My simulation could be a bracelet on a cold day. . I hope AlexJagow didn’t take it too much verbatim. I couldn’t figure what was the real application for that. I couldn’t access to your example as I was linked to goo…
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I have edited my previous file to add some thermal restrain as Sergio suggest and contacts between rubber and metal. Still below 1000 nodes.
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Hi AlexJagow, ¿What do you mean by preloading the bushing?. I have done an example like loading in one direction first and then radially on a rubber bushing. ¿Is it like what you are looking for? It needs ccx to run. File edited
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Thanks for sharing, Ken. Really nice post.
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Hi Sergio, I recently managed to make the user element US3 to work with the help of Victor. It is a real shell element which can be useful for what you are looking for and avoid interferences when expanding. It works in thermal analysis as well as …
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I have updated the file below 1.000 nodes just in case someone is giving a try to MECWAY in the free version. Accuracy decreases but it is just to show the idea. Run is less than 1 min. It requieres ccx ver2.18
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Hi Victor , Ken I have read one paper about Poisson's ratio in orthotropic materials which exposes some constrains in between their values. Now I understand better why there is sometimes a warning when introducing certain combinations of Poisson v…
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You could also introduce rotating loads applying the polar rotation matrix to the equivalent periodic load. x'=x*cos(2*pi()*t)-y*sin(2*pi()*t) y'=x*sin(2*pi()*t)+y*cos(2*pi()*t) Find attached example with 13 pinions. Time would drive the number of…
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Hi StefanH, The theoretical framework that covers the equivalent area and contact pressure between two parabolic bodies is the Hertz contact theory ( in your case Cylindrical contact). There is an analytical solution under the assumptions of small…
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Hi again ddraht, Really awesome work. The more I look at it the more I realize how much work you invest. Thanks for sharing. The forum is a nice source of tricks and knowledge for me. I have computed the modes using PERTURBATION and it seems to wo…
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HEllo ddraht, I see some possible conflict points: 1-There are some Springs defined as Truss and with an empty section definition in the general material window. 2- Three of those springs have a custom V axis aligned with the elements. It should …
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@Victor. Time Period=100s / Time Step=0.1s *WARNING reading *STATIC: the minimum increment 0.0000000000000000 is smaller then 1.e-6 times the step time; the minimum increment is changed …
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@Manuel. Thank’s for your response. I’m not sure 100% of which properties prevail when defining a custom model. Check carefully because the “Mass” tool use the density from MECWAY not custom model. If some values in the Solution Tree are compute…
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Very Nice example Manuel !. Thanks. ¿May I ask you something? I have notice there are some additional materials properties defined in the custom model definition. I have read in the ccx manual about them to understand their meaning and 0.0005 (…
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I didn’t notice about this fact before but …., if you think about it for a while, in fact it seems more accurate this way. The shell is an idealization, the midplane of something with thickness. If you apply the formula to the shell (midplane) , M…
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Hi RPP, If you apply the formula to the nodes the value will be the same as the node coordinates. As you are applying the temperature to the face of a shell, the value shown is the coordinate of the corresponding expanded surface (it will change de…
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It worked! Thanks
