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disla
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Comments
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Thanks barrti, That debate would be interesting in the frame of some other software but actually Mecway doesn’t have any shell formulation at all. https://mecway.com/forum/discussion/629/mindlin-thick-shell-kirchoff-thin-shell-formulation In fact…
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Also comment that if I apply a local refinement the nodes in the transition area disconnects.
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wow .That's pure brainstorming.
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Nice, First time a see dynamic analysis in Mecway. Seems you can obtain the natural frequency of the system ¿Isn't it? Found a second option which maybe is easier to implement. See attached file. Line pressure on the axis of a beam with unit lengt…
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You mean a way to make existing formulas available to other files? Yes
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I’m working on the Stiffness Matrix in Cylindrical coordinates and it would be nice if once developed I can have available all the formulas for each component for the rest of the models without having to write them again one by one. Maybe as you sug…
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Thanks Victor. ¿Is it possible that for future versions a custom formula can become part of the program library, so it can be used for the rest of the models?
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I was thinking and maybe you could build two pushpins. Unit surface on the head and apply the same pressure BC to both surfaces at the same time.Pin could be a beam element.
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" I am still trying to determine the formula for radial and tangential displacement" “I think you can get tangential displacement with a cross product but not sure of the formula off the top of my head” Nice challenge.
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My solution was not what was needed sorry.
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Hello SteveMelton You comment on previous post that “I was able to apply bolt pre-tension by using offset nodes and the contact feature” Here it looks the same strategy.” prestress on rivets at .005 inch tension” ¿Do you mean you draw the bolt short…
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KLINGERSIL C-4400 I used a constant value of 3 GPa. ¿Which constitutive model would you suggest?.
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Result can be confusing. I was able to mesh it, but it only generates shell elements. The slab is "empty".
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Bad geometry Your higher element in the hierarchy is a shell with and not fully closed. Cut it with the sliding bar and you will see there is no solid to mesh below the surface.
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Nonlinear material and Quasi Static in tree steps. Bolt Preload . Internal Pressure. Internal Pressure release. -Reduce the model to 1/28 and apply symmetry: OK. I found slave nodes needs to be removed from symmetry plane in order to work. No need…
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Thanks Sergio. Actually not. Most of the models I’m working in are kind of “second opinion”. At this moment I feel much more confident with hand calculations. My main concern here was to check my skills with contact and validate maximum stress/stra…
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Hello Victor, ¿Did you have the chance to introduce an ALT- key combination to show/hide elements? Thanks
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I tried. Option (meter gmsh 4), and it correctly scales the whole mesh. I’m using gmsh 4.0.4 The problem is that on the maximum element size definition box the scale factor is not applied so it incorrectly assumes 1 mm is 1 m as the maximum element …
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Thanks Victor. Meshing looks really fast now. WOW!! When meshing with Gmsh version 4.0.4. I need to introduce minimum element size x 10E-3. I remember to comment this with you on previous version. If I do not scale it seems like when I say 1mm is…
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Stiffeners below the perforated plate looks like they are not solid objects. Seems two surfaces together very close and "empty" . Check the image below. ¿Is that what you wanted to model? The geometry healing of netgen shows some small edges too. V…
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Could you post the file? Previously clean the solution for lighter file.
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Could you attach the step file?
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290.000 Nodes solved without issues. This do not seem a limitation of ccx. At least ccx_2.14_MT Intensive PC use but windows manage properly memory usage through the hard drive in case is needed. I only have 8 Gb. Try ccx ver 14. The link is in the…
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Thanks for sharing your experience with us.
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Hello Steve. “a couple of things going on here, one, the arm to clamp interface”. ¿Which kind of contact are you considering.? I think you didn’t merge nodes as it looks like a free clamp that could open or slip but ; ¿Isn’t a phisical gap between…
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Modify the step file with your favorite software, save it with the same name and in the same place as the original and then "reload" the geometry in the geometry menu in Mecway. Do nor import as new Step, just reload. As Sergio said be sure to add …
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Hello davefo, Don’t underestimate what you got. You problem is not trivial at all. I dare you to find a code which analytically solves the transition between a skirt and a cone with the supporting line "in the cone" itself. It is not by chance that…
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Hi davefo I’m getting soft Von Misses result. Check the deformed view of your result to see if it has sense. If it blows to hell or goes out of your axis center your BC are probably wrong and Stresses are nonsense. It is not mandatory but preferab…
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Hello, Victor it would be very nice if in version 10 the circular selection tool keeps the origin fixed when zooming so you can be more accurate on the radius without losing the initial circle center. Same for rectangle selection tool. Davefo the…
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I would suggest you consider your reference axis aligned (same elevation) with the lateral pins instead of the central , so you can impose they will not move vertically, only laterally. On this new reference the pins on the axis of symmetry (both) w…
