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Comments
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yes i agree with this as well
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this is a long video but i think it covers this topic. https://youtube.com/watch?v=M9YunnJhZbo&list=PLzGiietqAECXnIFl6ngHvhzgBxgTrC_qW&index=12 It looks like around the 17-20 min mark is showing this issue.
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no unfortunately you can only move the midplane offset. but you can move it positive or negative. so it's something you can try before creating a completely different surface. the main thing i look for now is which way the elements expand into any f…
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i've run into the issue of having to switch midplane surface and direction of offset as well. it's a pain but you can eventually get it to work. sometimes i can use the mid-plane and go one direction but not the other. i have modeled all three at ti…
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I can't figure out the Gmsh interface. I would love auto-hex meshing though. That would make it worth trying to learn.
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Thanks guys. Prior to your replies I tried Salome. I also tried gmsh again. I have tried that several times and I just can't stand it. Salome was equally terrible. The windows download is ridiculously huge. It takes up a lot of hard drive space once…
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oh I've been wanting a solve all config ability. i didn't know it was already there
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thanks I'll have to give it a try. does it do automatic hex dominant meshing
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what did you mesh that with
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thanks for your tireless work Victor. i look forward to trying it out.
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Thanks Victor, I'm new to YouTube and social media. So I don't know how to do a lot of things. Feel free to link to my channel if you want or can. I have to re-record the last to videos I did. One of them is the third attempt. Just having software …
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i finished the assembly. it is intended to help anyone wondering how to properly include a bolt assembly in their model. i will post it in a new thread so people can find it easier.
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hi hooshsim, here is an update with perhaps better BCs. i noticed you didn't have the shank bonded to the nut. so i added that. i also changed how the forces and moments are applied. i changed the contact stiffness values. i changed the fixed displ…
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ok thanks. i will take a look. i'm currently working on updating the example to a standard bolt so that i can compare to known values of force and torque. i picked a M16 class 12.9 bolt to work with. so it's of the highest strength allowing max forc…
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hi hooshsim, i attached an updated model. there are additional configurations. i noticed your fixed support didn't seem right. i tried to correct it the best i could. however, there doesn't seem to be geometry showing what fixes it in the z axis. i…
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hooshsim, i was starting to add more detailed BCs to the bolts and noticed your fixed BC was not right. you had some of the blot/nut faces fixed. this greatly changes the results since the cg of the assembly is off axis. i will post and update soon…
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i wouldn't say my suggested approach was not realistic. but it wasn't what you wanted apparently. honestly, i'm not sure what you want. the second time i just tried to get it to solve. it seemed like you didn't care about the bolt stress because the…
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hi victor, i started with the default contact and stiffness value from the program then had to experiment with a bunch of different setups and stiffness values. usually the stress was corrupted at high stiffness values and at lower values the defle…
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* updated model in a later post
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hi hooshsim, ok i think i got what you want. i modified your contact setup based on the experiments i did with a test model. i can't say for sure if it's right as i'm not a mecway expert. but it converges and looks pretty cool. * updated model in …
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i can't seem to edit the original post to this thread. i tried the displacement method and it wasn't good. when i tried to reset the model back to the way it was i got different results. they seem better than they were now. not sure why the nut exp…
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i experimented with the simplest bolted assembly i can think of. i don't see the value in trying to add this to your model. i will start a new thread with the example there. i have some questions and need others input. it's definitely a lot faster, …
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this is a pretty cool pic of displacement from config 3
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hi hooshsim, i updated the cad model fillets. i was able to get rid of the sharp point in my first model. this is much better from a safety and manufacturing point of view. everything about the mecway model is the same. i just updated the geometry …
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i have been using rhino 5 but have grown to hate it. i am waiting for moi v4 to come out. but if you are in a pinch you can use the moi v4 beta now and no charge to get v4 when it comes out. i was just waiting to save installation hassle. you could …
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i played around with adding the bolt loads and cyclic symmetry. with mecway i usually can't use cyclic symmetry because it uses so much resources, whereas ansys does not. but in this example, i was able to get it to run. i have found in my tests and…
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ahh thanks for the clarification. sergio and victor will be better able to answer your contact quesiton. i used ansys workbench for a very long time and it excelled at that task. so going to mecway was so painful in that regards that i avoid doing t…
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i'm wondering about your blade model. it seems like there should be fillets. the material says nylon. so i'm assuming this is a solid and not two plates welded together. but either way, looks like some fillets would be in order. i would also add a c…
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i took a look at your model. i attached a very simplified version. this is along the lines of what i was saying earlier of just fixing the washer faces. i wasn't sure of a lot of what you setup, so i removed a lot of things unrelated to what i was t…
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oh i didn't see you attached the model. id love to try it as well. i model similar things. ansys workbench is really good for retention modelling, cyclic symmetry, bolt loads, and contact. but i got tired of a lot of its other issues and switched to…
