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B-Only Compression Support in which one DOF is released. Example attached.
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Hi, I recall some years ago Sergio found the way to create a compound part in GMESH before meshing so the mesh was conformal in between the different parts. Maybe it could work here. https://mecway.com/forum/discussion/comment/3956#Comment_3956 E…
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Hi Victor, I think it is a very good idea to have a consistent framework for the different solver outputs and I trust your final criteria as always. Regardless the final selected option that update would also apply to Principal Strains, right? …
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Hi @JamesH , -For simple stiffeners you could also try to use manual mesh generation by extrusion. -*Tie should also work here. Regards
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Hi @aftab & @Fatmac -To fix opposite normals I have imposed an overall orientation and then inspect the model to see which normals are still pointing in the "opposite direction". The monitor provides some node numbers which can help to locate …
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If you solve with "No extra contact step" it solves the quasistatic problem too. Initializing the contacts without any load can be difficult because each contact element is pulling without any external driving force that gives a preferred direction…
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Regarding Validation: I'm missing 137 Kg in the overall vertical reaction. I'm using some springs in the support to separate External loads from reactions and measure properly.I measure reaction at the spring base. I think some couplings could be …
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That's an interesting approach for modeling connections. I would try to validate with some known reference. The issue I think it's one of the bolts. If one runs the analysis without the quasistatic option, it completes without issues. Fix those …
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Maybe you could approach the problem in the other direction. I mean to make the real piece to resemble to your stress-free initial design conditions model. That is the so-called Post weld heat treatment (PWHT). ASME Secction VIII, División 1 provide…
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Note that the magnitude of the velocity should also be a function of position. Each node rotational velocity depends on the distance of the point to the axis of rotation. (The shortest distance). That " radio" of each node can be computed with the …
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Thanks Victor.
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Appart from my previous question: I would add a suggestion . A reminder if the user changes the stress recovery point in the material definition. Something like: "Recalculation required". Appart from that, I just finished a small Mecway template…
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....Comment on your inbox
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Is this simplification still reasonable for an explicit nonlinear dynamic response analysis or does it suppress something important? @Sebastianmaklary Non-linear Buckling involve out of plane displacements. If you impose symmetry BC you are re…
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Congratulation Victor for the new Version. !!!
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Membranes can’t sustain bending . In a bending test you would expect a V shape compared to the U delivered by a regular shell. To see the expansion add NODE FILE OUTPUT 3D option
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Thank you Victor.
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Hi, Following the above discussion, If Perimeter value is not involved in the stiffness matrix, would I be wrong if I assume that value as 1 [m2/m] by default so I can indistinctly convert in-between linear load (KN/m) and Traction load (KN/m2)?.…
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Makes sense. Doubts cleared up. Thanks Victor.
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Example One arrow size should be 10 times higher than the other.
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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…
