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Mecway
FEA
Victor
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Comments
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I'll fix that bug of not updating rpm from centrifugal force. Not sure about including rpm for frequency results just because it's a bit more work. I've had to make some changes to Netgen so Mecway can interface with it, so it won't work properly …
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The CCX beams being solids can require refinement where traditional beam elements may give an exact solution with a single element. This picture shows the close match I see after refining
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Regarding different modes between solvers, refine the mesh and they match. Mesh refinement is the solution to most errors in FEA. No mass participation factors for the internal solver, sorry.
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As MikeMcMullen said, it's not well documented, sorry. I've tried to include references in the manual for special features like cyclic symmetry, but most of it is very standard. The 2D and 3D solid elements and the linear static solver are the same…
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The last RC version is now the final 15.0 release. Thanks to everyone for providing feedback and extra thanks to Germán Bresciano for maintaining the Spanish versions of the manual and tutorials linked at the top of here https://mecway.com/product.…
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@AndreaC91, sorry, I must have read 801kN at t=0 instead of t=0.5 s. I agree that half the external force should be 1702 kN. The difference between 1610 and 1702 is probably because external force is partly cancelled by part of the weight of the e…
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@AndreaC91, principal stress 1 at that location reduces to 0.019 MPa with a Refine x2 applied. I guess the tensile stress is being tested at integration points inside the element so it might be higher at the surface. BASE-SX is only one side's supp…
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Thanks @Sergio. No way to find the current length unit, sorry.
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It's not because of the free version. The error "element set ARCH has not yet been defined." is because Mecway didn't generate an ELSET for ARCH which is because it doesn't generate duplicate ELSETs and already has Element_Selection which is the sa…
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@protontim, which version of Mecway is this? I've changed how that works in 15. Hopefully it's more reliable, but might also go wrong in some cases that were OK in 14. If you could send me the STEP file, that would really help in the long term sinc…
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@ddraht, I'll reinstate bonded contact symbols of some sort in the next version, which won't be so far away this time because I'm changing to smaller and more frequent updates. @Sergio. The button placement is a tricky one since on the right is not…
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Tet, I'm not sure, but yes, there's a similar formulation for quad8 and tri6. I just haven't worked on that yet and don't want to overpromise. Yes, it will work with laminates.
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I'm now replacing the internal solver's quad4 shell element with an improved formulation (MITC4). It was already something like a flat-plate equivalent but the new one works better with non-planar and non-rectangular elements. It will also have more…
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Intentional. Hopefully Move/copy serves that purpose instead.
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Mecway doesn't have an easy way to combine solutions. The feature that's meant to address your problem is configurations. In each configuration, you suppress a different combination of loads and solve them all separately.
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I've updated the beta to release candidate link at the top which will be the final v15 if there are no new problems found.
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Better use the "code" formatting for posting code on the forum otherwise the indenting and possibly some symbols get broken. @JohnM, I've edited your post to apply code formatting.
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You can do the interpolation with a script but it's a bit of work. Here's an example for hex8 elements. For other shapes, you would need to use the appropriate shape functions. To use the script, specify an element and a point inside the element us…
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I see what you mean. I think the target audience of the manual, at least chapters 1-5, was taken to be engineers who haven't used FEA before. So engineering terms like stress-strain relationship and buckling may be just plonked there while FEA terms…
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Hello @BenDragon81037 and welcome. Regarding chapter 6, I'll try to summarize all the mechanical analysis types in terms of vehicles: Static - Least powerful. Essentially Hooke's law (F=kx) generalized to 3D. No momentum and no displacements large…
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@Sebastianmaklary I forgot to mention, you can re-enable *DISTRIBUTING in Tools -> Labs. Appreciate the feedback @JohnM
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@Sebastianmaklary Only Spooles, sorry. The MKL files are just to make compiling it with that easier. *DISTRIBUTING seems to give wrong results in some cases so I don't want to include it. You can make a remote force using moment applied to the face…
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It needs 3 values - start time, end time, and increment size. Perhaps I need to make that clearer somehow.
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You had me even more worried there, but I think your example is actually OK because the displacements are huge (~100000 x mesh size) and would be swamped by any actual constraints. So I wouldn't worry about the position dependence or inconsistent ro…
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It looks like some of the shell elements with certain curved shapes are leaking moment to ground. It improves slowly with mesh refinement. I don't understand what's causing it and maybe I need to replace the entire shell formulation to solve this an…
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Hello ehoule I think you might be running into a problem that the internal solver's shell elements have with some curved geometries. You can see that the solution is wrong because it isn't converging with mesh refinement: 6342 elements. Max. displ…
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Everything is reflected at symmetry boundary conditions, so fibers at an angle would have a kink along the symmetry line/plane. Yea, probably not useful for general laminates.
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> which in real world should build tension in the surface that opposes to the pressure, That sounds like a problem since the first iteration will have the applied pressure but none of the tension caused by that will have appeared yet, so the ent…
