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The file separated in case I need to update. Feel free to comment in case someone finds any improvement. This same problem can be found solved on YouTube with Abaqus but my approach has some small differences (more symmetric mode shape).
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By the way. I’m not aeronautical engineer. The proposed example is not intended to show how to constrain the base of a wing. It is just to point or make more evident why the error message emerge. Constraining all translational DOFs goes beyond what…
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Hello, I think I can help with this. To solve the problem one needs to keep in mind that when applying a Symmetry BC in ccx , Victor is first transforming the coordinate system to align it to the shell lip. Then 1 Translational DOF and 1 ROT In the…
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@Sergio Me I was also finding some discrepancy too. I have look at the source of that problem and solve the equation again. Arpaci, V. S. (1966). Conduction Heat Transfer. Addison-Wesley Book Series. (p. 130). Free acces: https://archive.org/det…
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HI Victor, Here another working example using the same criteria but diferent transform. I would say that as far as the new transform is coincident with the local coordinate system and loads are expresed acording to it is should work. Orientation is…
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Regarding the *transform definition I would say that the key point is to select a rectangular coordinate system that perfectly match the beam orientation. Beam orientation can’t be left to default. You can try and it fails. From all the reference…
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The file in a separated post in case I need to update.
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Hi Wjasiew ¿Have you consider using a Laminate material model ? Regards
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Thanks Victor. Seems I copy/paste a Russian word from a webpage.
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Hi Victor I finally found the reason. It is related with the file name itself. There must be something on it "a forbiden character I guess" that prevents from opening the file. Curiously, when using the internal solver, it works fine but ccx solver…
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I have found an old thread talking about this but I'm not using Bconverge and my executable is always the same when using MECWAY. "ccx_MKL"
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I thought about this problem for some days without any idea. First equation is an ODE that could be solved exactly once you get the Temperature evolution profile T(t) from the transient. I’m assuming E and R approximately constant. One side can be …
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Hi, Someone asks me in private about this approach. This is a reduced version below 1000 nodes to show it. Regards
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You still have a mixture of First and Second order elements. Merge nodes after homogenization. Then it will work. Your model looks difficult to me. Your spring is thin and has significant presence of Shear Mode III . . I would try to do some valid…
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There is a mixture of First and Second order elements. There is a line element in between the model too. You can find it with the tool Select elements by ----> and then Line 2 Line 3. Then erase it. What a cool shape.
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Thanks Victor.
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I completed the exercise with very good agreement. I don't do electrical FEA at all so probably my first part of the analysis to obtain the internal heat generation could be improved or speed up. Regarding the thermal analysis I had to do it with t…
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I have work Joule Effect on Mecway based on an example problem very similar to yours (more complete) that has analytical solution to compare. It solves the nude and insulated wire. It could eventually help to validate your Setup and Procedure. Read…
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You need to put all your electrical and thermal material properties right into place first. Clean and with their units. You started the post saying something about h=10 which now seems that has disappeared, You are mixing material properties with r…
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Thermal Conductivity units are W/m/K What about your electrical properties.? How did you end up in this value of "Tmax should be approximately 50C".
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Starting with a small brass rod 1mm dia. x 5mm long, I am applying 0.42A. Ta=ambient 20C , h=10, K=109 Tmax should be approximately 50C ¿Could you detail the Brass material properties units you are using?
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Here an example. Thermal Transient with varing negative mass flow. Result shows an alternating MF. That do not happen when the mass flow is positive. (constant or varing). I think this is a ccx problem because frd is showing the alternating value to…
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Hello Victor, I'm considering including an amplitude for the mass flow. First thing I have done is to request the actual value with *NODE FILE MF and I have found that the one defined as negative (water in the attached file) is showing and alternat…
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I have written the surfaces by hand and the result now matches very well with the theoretical expected result. The small deviation is due to the idealization of zero tube wall thickness used by the formulas. I have had to use a minimum thickness to …
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@Fammal Probably too late but recall to request for CDIS and CSTR to see contact results. Mecway doesn't add them automatically as it's supposed you are not unsing contact in Axy 2D. @JohnM If you enforce a maximum time increment your BC will be…
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I try and keep the ways to do things to a minimum :-) I agree but I thought it's good to know users can get much more if they explore. Mecway has clearly prioritized reliability over the number of functions. This makes it a more robust program…
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Since the solvers don't do non linear in 2D Axi ccx does. Just push the run button. Contact will automatically trigger the NLGEOM analysis.
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You could take a look at the modes you are using to build the solution.
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HI, Assuming the are no external forces on the bases, aren't beam forces at the edges near external bounding conditions same as reactions? Axial could be debatable as it may not be strictly vertical reaction force if the columns are hinged but she…
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Thanks Victor.
