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shear deflection Right. Nice point. Theory: 24.66 mm + 0.24mm= 24.9mm Result : 24.87 mm Deviation : 0.1% To build the section I have start from my standard section library. It was published in the forum some years ago. https://mecway.com/forum…
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Even better & easier. Add *NODAL THICKNESS to the Modify Keyword option window so it could be change there acting just on a named Node Set.
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HI Victor, ¿Do you see too much inconvenience in writing the shell thickness adding the *NODAL THICKNESS card? That would mean moving from : *SHELL SECTION,ELSET=SHELL1,MATERIAL=MAT1,OFFSET=0 0.005 To here: *SHELL SECTION,ELSET=SHELL1,MATERIAL=…
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File.
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What about working with shells but shells with variable nodal thickness? I have tried and seems a plausible approach. ¿Does someone have experience with that?.¿Any warnings about it? *SHELL SECTION,ELSET=Eall,MATERIAL=EL,OFFSET=0.0, NODAL THICKNESS…
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https://calculix.discourse.group/t/problem-using-u1-element-general-beam-section/600/5
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Could you sketch the profile section view?
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Hi, Try to follow this liml file as reference. Beams are not easy to apply Boundary conditions and these custom beams are known to have some limitations.Be sure to validate the beam before using it. By other hand , once expanded, they end up as sol…
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Thank you, Victor. First tries and I love the script. It has so few code lines that I even feel a little bad that I am not able to write it myself. One thing, It seems to send the new beam elements to another component. Not sure why.
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You are right, the other transverse and longuitudinal modes will change value. I have try extruding a thin layer and assigning the equivalent inertia by means of adjusting that layer density and seems a more accurate substitute. Again, just for tor…
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harryvanlangen has a script in the Python API Scripts folder called "Shape.py" that can move a set of nodes in the normal direction to the surface. ¿Maybe that script could be rearranged to be able to offset a set of selected nodes a given distance …
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¿Why is beta damping not working?. It has no sense to me. It's the one that could really help to remove all that noise ¿isn't it? ¿Could the pendulum be a rigid body? ¿Why two spheres? Their contact is difficult by itself. Maybe better flat surface…
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dynamics misery club . Thank you Sir.
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Shear ZX Stress seems to show discontinuities in-between elements. Right. EDITED:Reduced integration doesn't seem to have this problem.
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Deleted.
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Hi John, I have been able to make some humble progress with Explicit. At least I feel more confident to make it converge. Take all what I will say carefully. Explicit Dynamics account for quickly changing conditions and discontinuous events. Select…
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I would say one could adjust the rotational inertia with an offset of that ref node with respect the axis of rotation. I have done a couple of tests and the natural oscillation frequency of the system varies (Increase of the rotational inertia)
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HI Victor, I would kindly ask if the "Hallow" tool could also be implemented to work in the same way as it actually does with solids but for shells. The goal would be to convert the constituent element sides into beams. That way one could easily tr…
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Hi, Roark's formula is an aproximate value. It for this I section (r=0) is It=47.963 cm4 Introducing that value on a general beam section produces the exact result of 14.56º which agree with the analytical solution
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Thanks!. just comment I can see both displacements, real and imaginary parts.?¿? I'm using v2.19.
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Hi DeAngelis, Thanks for comment. New subject so I appreciate it. you are plotting the imaginary values of the FRF Right. Just in some cases. The tool is not implemented yet and Mecway can't extract it properly yet. I had to choose the most no…
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Is frequency response.liml this? Yeessss. I need to incorporate this into Mecway's UI eventually I think it would be very appreciated. Meantime users can try with custom cards: Previous *STEP *FREQUENCY,STORAGE=YES is needed *STEP *STEAD…
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I have applied the procedure exposed above to the liml file DampedVibratingStrip.liml provided in the Examples of Mecway. I have first identified the dominant mode w1. (7.14 Rad/sec) As an example, I have determine the Damping coefficients for a des…
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No, I haven't try it. I will take a look. Thanks 3Rav.
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Thanks, JohnM and Sergio. Developers comment to me they are using the nonlinear Levenberg-Marquardt algorithm. Not much more information about it. -K. Levenberg, "A method for the solution of certain non-linear problems in least squares", Quart. Ap…
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Thank you, Sergio, I sent to you a private message. These two graphs compare how a well-known commercial software and the free curve Fit tool adjust a given set of experimental data. Not bad at all... In fact, it looks slightly better to me. The on…
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-¿Could this be one of those cases where the window goes out of screen or behind other unnoticed.?¿Could you try switching in between windows with the Alt TAB key combination to see if the second job monitor shows up.? -¿Are you running both files …
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If you are planning to reduce the time step, you could also reduce the number of elements. The brick is symmetric and BC also makes this a 2D problem.
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One could use this Nonlinear spring element to set up an only Compression or Only Tension Truss. Just provide the proper Reaction /Elongation Curve. NOTE: Do not confuse displacement with elongation. Not the same. It has puzzle me for a while. Mec…
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Thanks John, Not easy but it's worth the effort. It’s good to confirm the different tools work properly and understand their limitations. I have found that Contact can be slightly sticky so it’s not a good idea to abuse of the Stiffness parameter.…
