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Victor
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I know this is kind of theoretical, but fairly generally, failure to converge happens at a point in time when the loads can't be balanced by reaction forces at constraints so no static solution exists. A tension-only material would be at risk of thi…
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@disla, the message "Pressure load requires too many sampling points. Using 1001 uniformly spaced time values for *AMPLITUDE." comes from Mecway converting the formula to a table of discrete (time, load) pairs for CCX. Mecway chooses time points for…
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Thanks Disla. I thought I should post a screenshot because it looks so beautiful. I added the triangular load function because it tends to produce a more mesh independent load whereas the step function used here can have bigger errors as it trans…
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Yes, there are two *SHELL SECTIONs for the same elements, so they can conflict. Remove the material from the component in Mecway to prevent it generating that. Catenaries are pretty difficult but it is possible to model a straight line and let grav…
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@MikeMcMullen Yes
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The (ever)upcoming version 15 of Mecway will be able to export solutions to Paraview .pvd + .vtu format. I agree with disla that the free version can be used as a viewer.
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You should be able to drag and drop .png or .jpg images into the editing window. ? I still don't understand what the domain of the inner integral is. But if you can evaluate that using the table data, then great. If the only obstacle is obtaining …
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That is a pretty clear paper, @disla! I'm confused though about what volume ∆V the inner integral is evaluated over. The equation for risk of rupture of a volume V is The sum is over the elements in V. The outer integral is over the volume of a s…
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No others.
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Here's an example of an extra *STEP section. It adds another 50 s of time, changing the total period from 100 s to 150 s. It looks like the contact is being released and the parts suddenly move further at 100 s. Time-dependent displacement doesn't …
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It generated a mesh for me with the default meshing parameters (press Reset button in Meshing parameters to be sure). Some elements were badly shaped (red X) but turn off Fit midside nodes to geometry for a quick dirty fix of that, or reduce element…
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Mecway doesn't have that option, sorry. You would have to place the nodes in the offset location and connect them to the rest of the structure with additional beam elements or constraint equations.
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Great hack! I didn't know you could do that This is a tricky problem of simplifying the model for zoom then somehow knowing when to unsimplify it. If you have a Spacemouse, that zooms the smoother way with simplifications because it knows when you'…
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Just concurring with how disla's example does it. You don't need anything complicated like multiple steps or restarting the solver to apply different loads in sequence. Just define their time dependence with a table or formula. Do that with Nonlinea…
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Fantastic. Thanks. There are a lot of redundant hidden face selections that are just there so that if you add a new one from the geometry, it'll know which mesh faces it is without remeshing. It's safe to delete them like you did.
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Hello RPP. Unfortunately, this is currently a limitation with named selections. But there are some shortcuts to redefining everything: 1. Don't remove or import the STEP file again. Just replace it with the new version and regenerate the mesh and …
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Haha and incredibly similar too!
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I would do it like this: * Start with a refined 2D plate for the plan of the whole structure. * Delete elements for the holes (shown partially done in the picture). * Adjust rows of coordinates at a time to position everything correctly. * …
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Easy to not notice with such an incredible coincidence occurring! The same thing confused me while I was checking it. @disla You've run into an even more insidious problem in that there are two different conventions that both use the same name and …
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There's a difference in the definitions. The Poisson's ratios in CCX are nu12, nu13, nu23 whereas in Mecway they are nu12, nu23, nu31 For exporting to .inp, Mecway converts nu31 to nu13 using the formula nu13 = nu31 * E1 / E3 It's just a surp…
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Here's an example of normal pressure due to a force in the X direction following the function P = 123 Pa * cos(θ) where θ = atan2(y, x) For other directions, add the angle to the angle obtained from atan2().
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From the CCX manual, the direction of the 1st tangential direction is "the normalized projection of a vector along the global x-axis on the master surface. If the global x-axis is nearly orthogonal to the master surface, the projection of a vector a…
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EDITED: Excuse me, I misread your question. Add axial force, bending moment, etc. through Solution -> New force and moment.
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Ah, it's already sort of answered there You just need to put any load on it, along with the necessary constraints for a static analysis and that activates stress stiffening which causes elastic bonded contact to work. I've confirmed it with a small…
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I think you may be stuck here. Elastic (which is *CONTACT PAIR with *SURFACE BEHAVIOR,PRESSURE-OVERCLOSURE=TIED) doesn't work with modal. I'm not sure why. It should be mentioned in the manual but isn't, sorry. I just confirmed it on a simple solid…
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@struthon. No, the API doesn't allow that but will do in the next release (v15). Yes, you can add data to the .liml file. It accepts both a binary format and a text format which you can work out by looking at files saved by older versions up to v3 h…
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Thanks for the update. I'm surprised that relaxing the stress as it goes is correct but it sounds like you understand it better than me.
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Are you looking at the same variable? The stress is concentrated at that end and looks something like that, but the displacement varies more uniformly along the whole length. Did the solver show any error messages? If it didn't converge, you might …
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Thanks for those details, @disla The graph keeps the maximum time range of the modeler and solution, so it's stuck at 100 s after you solve because the solution has that. This is intentional for consistency when you switch between the two. Regard…
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Very nice, especially that it appears to have captured wrinkling near the edges. Can you tell if that's real or some sort of error? @disla. Good point that the mass tool in the solution ignores any density defined in the CCX branch. Formula field v…
