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I would say you have something not properly linked to the .dll? This is how my working directory looks like. I'm using the dynamic version of ccx 2.21 from official webpage and very last MFRONT portable sent by Rafal v2.8. By sure the working dire…
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Is there someone else that the convergence fails at that time step.? Is it for all s1 s2=s3 combinations or just some of them. Just for reference: Could you try this two time steps. EDITED: Loading conditions are not easy to constrain in such a…
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It must fail but not at the time step its shown on your monitor.(9.766E-6s ?¿?) Have you change material parameters or loading conditions.?
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If before defining the laminate you enter the overall thickness in the geometry window, the less than 10micron error disappear.
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I have finished the testing and the agreement with the expected result is very good. DRUCKER PRAGER CAP material behavior needs custom cards as shown above and the portable MFRONT drivers recently published by Rafal.brzegowy in the Calculix forum. …
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Seems like the forum do not accept the symbols Bigger than and lower than and removes it's content. What I can't relate is constant MFRONT Tau with Abaqus beta, K , sigmac. NOTE: First post can't be edited. Damn it. Units are obviously wrong. C…
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Ok, I will try. Thank you.
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Initial position: The boogie has velocity 1000mm/s and offset t0=.75 seconds. It is advanced 1000*0.75=750mm from the origin. The center of the load is in between two elements and Mecway has split the load. For the load to arrive on the center of th…
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@Victor, I was setting this up and abondon when realized the amount of equation required. Colinearity should be imposed by pairs of nodes on each equation. Writing all nodes in one *equation card isn't enough.
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Hi John, Have you tried two springs instead of one and a solid or beam section in between? The pretension would be applied to the that mid element. This is the idea.
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The different Strain measures helps you to understand the result and convert them as needed. By now you have probably found that the Strains given by ccx when NLGEOM is ON are the Lagrange Strains. If you want to use them to plot a Stress Strain Cu…
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Hi Fatmac, I have also noticed that you should also take a look at your graphs. They don't seem consistent with your results. They reflect the importance of distinguishing correctly not only the stresses but the Strain you are talking about. Engi…
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You are in the right direction. I can barely express how much light a simple cube can bring on this subject. -First let me tell you I like to express imposed displacements as it’s equivalent Stretch. Stretch do not depend on the Strain framework, a…
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There is another source of discrepancy when looking at the "reaction forces". When the applied force is distributed (like gravity), part of the force ends up at the constrained nodes and it is deduced when evaluated. Reaction force = Sum of all Ex…
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Is Shech asking for a CFD?."Internal 2D problem". I don't understand well the question. "Flow field" and thermal field can be transient with pipe element if that what is asked for.
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Forced convection ......Wasn't this what was introduced in v19? It should work with shells too ¿right? https://mecway.com/forum/discussion/comment/6917#Comment_6917
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I see . There are many details to consider. Thanks both, @FERNANDO When concrete cracks, it stops supporting traction. Yep. I have noticed on the calculation report. There is a completely different Young modulus before and after Mcr. @MikeMc…
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Hi, I have some progress. I can now predict the failure point (in a Brazilian test for example) and it agrees well once the results are represented into the Mohr Coulomb Diagram. (Failure=Circle touch the line).The problem is that the expected fail…
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First, I'm mapping all those material properties involved in a report into ccx material properties. Compression_only material has two constants, apart from density,.... *USER MATERIAL,CONSTANTS=2 **• E. - ----Ec28 According to EC2 Below Mc…
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Hi Mike, I have read that your formula refers to what EC2 calls fctm and it’s a mean value for tensile strength. fctm [MPa] = 0.30⋅fck^2/3 and it is valid for a range of concrete class ≤ C50/60 fctm [MPa] = 2.12⋅ln[1+(fcm / 10 MPa)] for concrete c…
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Hi, I ‘m working to get that concrete beam reference file for MECWAY/CCX. Segio suggestion is too intimidating for me to start with concrete, so I’m starting with a simpler example. It is based on an EC2 calculation of a simply_supported T cross se…
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Great, Are you using the old portable version of MFRONT or the new published?
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Oficial ccx_dynamic.exe ver 2.21 as your ccx solver. http://www.dhondt.de/calculix_2.21_4win.zip @Sergio Most of the available material models I have tested doesn't or provide nonsense results. Each material behavior .mfront need the user revisio…
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Well, That's some progress. Could you push on the Details button and post to see what’s the problem.?
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Have you set up ccx_dynamic.exe ver 2.21 as your ccx solver.? It should look like this.
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Hi Fernando, Rafal.brzegowy will try to compile a new portable version by the end of this week. Let's see if that helps. Mean time you could try the old portable one. It works for me, at least for the most basic material models. Just put all those…
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Strange it worked before. This is like a press and typically works better solved imposing displacement.
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How did you install the Library.? What's the error message?
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Hi Fernando, Do you have some realistic parameters for a standard concrete.? Let's Say HM-25 I can't find information about : **• Dilation angle ψ in degrees and the relationsheep between **• Cohesion yield stress and its Equivalent plastic st…
