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cwharpe
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@brandonman, EDITED 4/18/24: ..."von mises, principal, regular ol' stress, or strain [of beam elements]". For CCX solver: Your list of stress outputs are listed in CCX as available for 2nd Order beam elements, to date limited to Solid & Hol…
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All the various cross-sections are available for assigning beam properties to Line elements, not shells. When working with Line elements some consideration must be given to whether the connections are rigidly fixed or simply supported (pivoted), ho…
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For pressure against a vertical wall between, say, z=0 and z=40, you might simulate a linear hydrostatic type function by multiplying peak pressure * height ratio. Pressure = [Peak*(z-40)/40]. Adjust vector sign (+/-) as needed. If you try to dup…
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EDIT: Hmmm. Maybe instead of thinking F = P * A(sin(x)), think F = P(sin(x)) * A , where x = tilt angle. Enter P*sin(x) under Traction (y)? Still not very intuitive.... And then if there is a compound tilt angle?
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Agree there could be some refinement for the Move/Copy tool, but for your case shown: Is an extrusion of the end-faces possible? A total thickness (distance), with 73 subdivisions (new elements).
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FLIPLINE2: A Line2 coordinate ranking script to adjust U-axis directions. A time-saving alternative to Invert Tool requiring less selection scrutiny. Any constructed mesh might result in random alignments of element axis (through construction o…
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Great having the options of N-S coupling for the internal solver! and Thanks for cleaning up the Sum Tool. In haste, I kept making the very error (Sum Magnitudes) I had cautioned about. @prop_design: No Fair retiring before the rest of us. …
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Encountered no trouble. Opened in CAD, saw no gaps between lines. Created one polyline, exported as AutoCAD 2000 (ASCII) dxf. No trouble in Mecway. Automeshed surfaces as shown. EDIT: Went back and was able to duplicate your issue when I impor…
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@ing515: * Your original "automatic & point refined" mesh actually looked pretty nice, for my purposes. * I think your merging issues occurred because the element count along the edges of the Hole Plate mesh & block-out did not matc…
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(sorry, I am posting late...) This has come up before, and I have it noted in my Caution file: Summing reaction force magnitudes generally does NOT equal a System's Resultant (unless [rarely] all node resultants point the same direction). That p…
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Just that I've followed advice I read somewhere to "Fill the Volume" of the bolthead spanned when sizing spider cross-sections. Haven't quantified yet how important that is, since stiffness = E*I is more easily adjusted through Youngs Mod. Lot's o…
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@Sergio: Same/Same. Makes sense. That's how I've been using them. If another size fastener happens along within the model, I've just renamed into a different component. Try this...
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@kuhtip: When comparing (Mecway) Spiders of beam elements with FEMAP RBE2's, some adjusting of beam properties is necessary to produce an equitable simulation. Even so, an approx. 2-3% deviation between solutions is expected. (Ref. subject near ht…
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Liking everything you did for Line and Shell elements. Beam diagrams, Line contour plots, edge detection. Instant value added for me. Thank You.
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Big vote for the beam elements into shells at areas of interest, for reasons of node economy, improved solve times, and easier model inspection. Many analysts* successfully use RBE2/RBE3 (Kinematic/Distributed Couplings), i.e. "Spiders", to transit…
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Hmmm. Looks easy enough, but didn't work every time for me. Often saw a Warning: Coincident faces were ignored. message before failure. I first laid down the Hole Ctr. node on plane, then drew a line vector that. Next ran the Hole mesh routine,…
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For several components, Sergio's suggestion should work if you only select the nodes of interest -- that is, Hide all other Components under the Solution tree, then highlight only the part of interest before Finding Max/Min. If you don't select/hig…
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Try a click in clear-space, then Solution/ Find max/min. If the tracer lines are below the object surface, try deselecting the Show Element Surfaces. (Might also have to view internally with the Cutting Plane slider bar.) Verify its value by pick…
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A bit rusty, but trying to keep up... I'm a bit confused with the 3 axes (Tangential, Meridional, Hoop). Isn't tangential the same direction as hoop? For nomenclature's sake with pressure vessels I'm equating tangential=circumferential=hoop, mer…
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@Victor: I was able to get the *TRANSFORM card to work, so Thank You for that. No free lunch, however. I had to keep working the trig to load it properly, then to interpret the results from Beam coord. system back into World C.S. -- became a li…
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@disla: Well, you are on to something. Turns out CCX will pass solver for all principal angles in the plane up to the limit of arcsin(b/a). For b/a=100/150 yields my 42 degrees (41.81..). Just an eyelash past that angle CCX solver fails. That…
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@disla, Still mis-behaves if the beams are separated apart. Also, each beams' V-axis seems correct in the orthogonal position to the beam axis? It is puzzling why some angles work, others don't.
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@disla, Replying to first post. Very clever. Curious to find an efficient way you constructed it (?). I observed it was MUCH easier starting with Line3 elements up one end, then extrude into (one) column of stacked quad8 elements, then set up t…
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Got it. Thanks.
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@disla I'm loosely following here. Are you saying you created a gasket of sorts that is bonded between each part? And positioned correctly by mirror/revolve from the opposite pole w.r.t. center hub, maybe from 180 deg position?
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@disla -- you consistently demonstrate some very graphics. Glad it worked.
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PURSE a set of edge nodes together with Line elements Purpose: From a selection of perimeter nodes, script connects line elements (Purse) that can be Auto-meshed, which helps patch regular shaped voids in shell meshes. For high-density meshes sur…
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Could it be the mesh itself? I started from scratch and extruded a cylinder of your dimensions. Did not see the blue blob you show for moment/length, rather a uniform contour. Checked against a second model without Spiders, but with hard constrai…
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Yes, I see that now. You seem to be on the right track. Thanks.
