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prop_design
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@disla i haven't tried the new version yet, so i can't answer your question. i would doubt that the option to select the solver type has been removed though. i don't think i'm going to bother upgrading the solver either. there doesn't seem to be a r…
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i would beware of how you compare pastix to pardiso. people are reporting with pastix mixed precision turned on, it gives wrong results sometimes. if you do an apples to apples comparison, using double precision, pastix was slower for me. it was als…
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it's hard to tell exactly, but it looks like it is just varying from +/-. I would imagine the absolute value of the deformation would be the same number. I looked at one of my old models and it does something similar to what you show. Usually, I can…
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yeah that feature works well. only implemented for some operations, like volume optimization, right now.
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yeah, that sounds like what i mention in the video. there seems to have been an undocumented change to netgen, that happened pretty recently. victor had already updated netgen for me, not that long ago. however, since then, they improved it more. it…
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for your specific issue, in the topology doctor, i attached a picture of what to look for. on my model it says there is one solid. so on your problem geometry, i expect it to say you have some other entities in there and maybe not even a solid. the …
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no, it must be referring to a previous install of actual netgen. it won't affect mecway's netgen at all. i have a video of some getting started tips, that might help too. https://youtube.com/watch?v=6amu7J26kqY the part about starting off with ad…
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cool aircraft. i don't do consulting anymore. i created a program called PROP_DESIGN. it was sort of a bucket list task for me. hopefully, i'm finished working on it now. spent the last 14 years making it better. it's not for your horizontal rotors …
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it looks like netgen will at least show you if the imported geometry is a solid or not. use the iges/step topology doctor tool. it also shows some other things that might have let you spot the problems. you can download netgen from here; https://ngs…
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one thing i do is check the volume in cad and again in mecway. making sure they are reasonably close. if there is a problem with the geometry, the cad program i use won't calculate volume. so i use that as a check of the geometry as well. i think in…
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I think I saw something similar to this recently. There is a certain option you have to use with SolidWorks to get step files to work right. I don't recall exactly what that is though, possibly split periodic faces. I've never personally used SolidW…
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@Victor that is an exciting development. If it is a Mecway solver specific feature, it would be really helpful to have the Mecway nonlinear solver reintroduced as well. Unfortunately, linear only isn't accurate enough for my models. The deformations…
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Oh, I think I remember testing the i8 versions and they were much slower at the time. I think there is an old post about it. In any event, I can't really remember. This time, I just did a quick check to see if they run. I didn't look for the speed d…
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I just downloaded the files again and tested them. I'm confused as well. There is a ccx dynamic i8 that doesn't run. I can run ccx dynamic or the static versions. So there is another library or something that he hasn't mentioned what it is. I guess …
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I think the i8 is for double precision integers. People were having crashes for very large models and that seems to be the fix. However, in the version I downloaded, I don't think that file is in there. So it seems to be new. I've posted the setup …
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thanks victor, i overlooked one thing. in the table it only shows hz. where as on screen it shows hz and rad/s. so another area to look at would be the table. maybe have an option for which units or report all three. hz, rad/s, rpm.
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Hi Victor, For v16 would it be possible to have a setting for angular velocity input and output. When I apply a centrifugal load it always defaults to rad/s. I have to manually switch it to rpm. I do this a lot, so it would be nice to have it defau…
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Just tried v15 for the first time. I definitely like the old way of having the selection buttons in the graphics window. They are easier to get to there and much easier to see. I'm glad there is an option to toggle the old way in the settings. Pleas…
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If you are using CCX, you can find the following info in the *.dat file: E I G E N V A L U E O U T P U T MODE NO EIGENVALUE FREQUENCY REAL PART IMAGINARY PART …
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as far as the issue with not saving. check in solution view how many nodes there are. the calculix solver expands shells to solids. so you end up with a lot more nodes than what you start with. it good be that in model view you are below 1000 nodes …
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thanks. sounds exciting. i may be using the wrong terminology when i said tet. i think when you said tri6, that is probably what i meant. basically a triangular surface element with midside nodes. it seems like netgen is best at making those. the qu…
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Is there a way to apply the new formulation to tets and quads with midside nodes? Will it work with laminates?
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that's not good about element axis not updating for nonlinear analysis
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i tested your file with an orthotropic material and it seems to do the trick. everything else seems ok.
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i think you need to use an orthotropic material property as well.
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maybe something was updated wrt solid element orientation. i did my testing a long time ago. back then, even if you defined an element orientation for a solid, it was ignored. you can view the element orientation by clicking on an icon in the toolba…
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hi victor, 1) i'm still hoping for a delete all option on the solution results. this would allow me to switch from nl stress to modal analysis a lot easier. delete all would also remove custom formulas. 2) also still hoping to have what mecway use…
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hi disla, i did tests along these lines as well, when i first started testing the composite capabilities of mecway. to your point here: "-Surprisingly to me, shell elements in ccx and Internal solver seems to give better results for thick plates t…
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Experimenting with the laminate orientation is the funnest part of doing composite analysis. The sad thing is, you can't get a good view of the internal layers. So it makes it a bit harder. Sometimes, the open cracks option allows you to see the inn…
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My understanding is, for solids, the element orientation is always the global coordinates. So solids are not very useful for composites. For shells, I believe the element orientation is applied by the original definition. Interesting catch on the mi…
