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Very nice set. Thanks JohnM. That Graph Grabber shows a bit more polish than the (free) Engauge Digitizer I've been using.
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@prop_design Thanks. That clears up a few things. Are you also using the CCX folder modify keyword *STATIC ==> Name=SOLVER , Value=PARDISO ?
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Unpacked the files from http://www.dhondt.de/ and was able to get Pastix running by pointing to the ccx_static_i8.exe file from Tools/Options/Calculix/Solver line. Thank You. (What's the difference between static.exe & static_i8.exe?) Pardiso…
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Are there any updates to steps for improving the performance of CCX since the release of Mecway v.15 ? I had upgraded my PC to Windows 10 some time back and got spun around trying to regain Pardiso functionality. Never tried Pastix, but would also…
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@BenDragon81037, Reading Materials: I agree with @MikeMcMullen on the "### for Dummies" or any other summary stuff you can get your hands on, whether online, Youtube, trip to the local library. Examine the worked-out problems, maybe Chaps. 1-3? M…
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@disla, No worries. If it proves accurate enough, was kind of hoping to see it evolve into a Python script for the Mecway API cache. I'm an old Fortran guy, so I would need assistance. The vertical slope/divide by zero "quick patch" was bugging m…
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@disla, Learning something new every day. Never heard of Radial Basis Functions until your post. Looks like the beast. Along the way discovered various geospatial interpolation techniques out there..... But yes, ...Shape functions seem to be the…
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@BenDragon81037, The essence of those "specific terms" you mention can, from time-to-time, give a few of us around here trouble as well . When I read your earlier posts I thought to reference the basic fundamentals in (at least) the following su…
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Great tips, guys! That might qualify for a TED Talk. Just wanted to reference previous mesh parameter tips posted by @disla, @prop_design, @VMH: * http://meshcapades.byethost13.com/netgen_intro.html?i=1 * http ://youtu.be/6amu7J26kqY * htt…
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Nice work, disla! The method employing direction cosines is the proper general approach for 3D space. @StefanH: I see you need to track the X coordinate for your ramp function, which the (Constant) Line Pressure function does not allow (it needs …
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Ha! @Victor beat me to the punch. Couldn't resist getting up for that snack....
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Hope I'm not over-simplifiying your issue, but I've always modeled welded frames like a sandwich. Using Mecway tools, I create the shell footprint of all bottom flanges joined together. Often this begins in the form of several rectangles, and usin…
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Yes, with Plate Mesh transitions from curved to straight, particularly in regions near holes (e.g. lug brackets).
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Also curious how the graphics show the deformed orientation of the joint end faces. One expects a relative angular displacement between faces, but the initial orientation is preserved, thereby distorting the end element of one of the joint members.…
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I agree with the more rigorous application of the constraints. Back in the day with NASTRAN entry software we used as students, you couldn't solve the flagpole-in-compression scenario without first 1) fixing the base rotations or 2) guiding the fre…
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You might also try an adjusted Traction pressure equation. This approach costs no further work when changing resolution. Say you have a simple ramp load function (ax+b) in the -z direction, with x as the beam length axis. [Or, if the first beam nod…
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Crafty external editing hack. Seems I can't avoid scripting in one form or another. I'll give it a try. By the way, some very nice improvements in release 14. Some of my favorites: * Outline Tree doesn't scroll after edit & stays put (Th…
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File below.
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Yes, I think the classical solution produced by Roark neglects stress concentration at the fixed support. Your suggestion led me to create a rigid "picture frame" surrounding the plate, which I made rigid by increasing the Modulus by 4-6 orders o…
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The ASME B30.20-2018 Standard refers to two classes of testing -- Operational Tests & Load Tests. Operational is qualitative -- clasps close, arms rotate, switches throw, etc. These things are mandatory. Whether to Load Test (typically 125% o…
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What also works to retain the top-edge shape is to increase the stiffness of your spider beams, whether by bumping the spider's Young's Modulus up by, say, x1000, or by increasing the spider cross-sectional inertia by a similar magnitude. I seem to…
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@Victor, If the named load groups (folders) is still in the works for ver. 14, I'm wondering if the needle has moved yet for adding a multiplier (Co-Factor) outside of the group? This multiplier would apply to all the loads within the group, and w…
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Thanks for the reassurance. I was half a minute away from a clean re-install to chase out the gremlins. Also, had never expressly loaded an .frd file to check results. Until now. Nice workaround.
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[A belated Thanks to everyone who contributed an answer. Clearly, modeling a bolt with solids gives a superior result. Seems I learn more when things go wrong -- I'd never heard of hour-glassing before this.] Lately I've been trying to verify the…
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I actually have the same question. So, I'm next in line after DCH. Hoping to simulate the bolt spiders using node-surface coupling and inducing preload by node displacement. Preload by constraint equation would be nice, but it's not available in …
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Thanks! This helps me begin at least within the ballpark of the successful solution.
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Thanks for the reassurance. Regarding initial Contact Stiffness (C.S.) between two dissimilar materials, say E1=30e6 psi, E2=10e6 psi. Let E1 material be 2" tall, 3" wide, 4" long, and E2 material be 1" tall, 2" wide, 3" long. Using your formula …
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I made Victor's constraint adjustment, set the time step to .01 s and reproduced the plot (Cheers). Another point of the exercise was to see how close to theory the results came. For quick comparison, I am using the calculator found here: https://a…
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@Victor Is it possible to peek at your Analysis Settings window on your Non-Linear Static 3D solution. I've input your suggested values but I'm not getting the expected solution. My time step graphs are do not look smooth like yours, and when I d…
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@JohnM I'm a total newbie with the CCX side. Couldn't get your example to work. CCX solver says "cannot open file MY_AMPLITUDES.INP". Maybe I've got the file in the wrong place??
