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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
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Hi denissps, I hope someone knows a workaround and will tell you how to import lines from Salome. I don't know how so I would suggest you don't forget about the possibility of meshing manually. I have seen many comments on this forum of users strug…
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I have never used it either. I'm not sure if it is the same but when meshing I would say I have seen some message in the console regarding OptimizeMesh at the end of the process.
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Thanks, JohnM, I was lucky to press the button but it would be a pity if someone needs it and do not give it a try just for seeing that red alert. I'm still trying to run the Ball file with Nonlinear and Plasticity and it is not responding to me.…
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It doesn't respond. ¿Is it just me?. I would appreciate if someone else can give it a try. I have tried v.17.1, v.18, v.19 on a WIN10 machine and the one coming with Mecway. ¿Could you post your ccx executable?
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Which version of ccx are you using?. When I try to run it, exits the solver without any message.
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Hi , I think this should be just a bug in the UI. There is a red colour in the "contact" text for the Dynamic Response and it disappears when I switch to Nonlinear Dynamic Response. Contact seems available for both analyses. Thanks for the example…
