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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…
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Now I have remembered I already made a test example with Mohr Coulomb but it is related to Soil Stability. It is a copy paste based on a You tube video and I did not found too much application to my working area so I didn't go more in deep.
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I'm not civil engineer and don't have experience with concrete, but if anyone else is up for it, I'm in. I can try to apply this Mohr Coulomb to my previous file as I know is converging fast. Later we could try; 1.2. Reinforced Concrete Beam or …
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Be careful if you are using: PASTIX_MIXED_PRECISION = 1 It can speed up the analysis but there has been reported some issues.
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I assume that this option allows using multiple processors For running multprocessor, create new Windows System Variables with settings: OMP_NUM_THREADS=6 CCX_NPROC_STIFFNESS=6 Using more than 6-8 proc for most models will not reduce run time f…
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Hi Fernando and welcome, Ccx manual says that for those models “In essence, a one-dimensional Hooke-type relationship is established between the principal stresses and principal strains.” So, the Only tension and Only compression materials models i…
