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  1. polak7

    ECAP - material flows between the punch and the die?

    I have a new problem. I am getting very high strains in a billet, where it is in contact with the die. It should not be like this. What may be the cause?
  2. polak7

    ECAP - material flows between the punch and the die?

    Update: It works also with discrete rigid punch, but surface-to-surface contact must be defined also for sides of the tools. Previously I defined contact surface only for bottom surface of the punch.
  3. polak7

    ECAP - material flows between the punch and the die?

    It works. Thanks FEA way. What helped was to replace the discrete rigid punch with the analytical rigid punch. Second thing, which was necessary is the use of surface-to-surface contact. Using the general contact generates errors. The next step is to add heat analysis to it. The problem is...
  4. polak7

    ECAP - material flows between the punch and the die?

    Hello. I have a problem with modelling of ECAP (Equal Channel Angular Pressing) process. The problem is, that the mesh distorts heavily – it looks like the material (billet) flows between the punch and the die during the processing: The assembly is given below: The ECAP canal has 10 x 10...
  5. polak7

    Steel rolling process with large deformation - implementing ALE adaptive meshing

    The frequency is set to 1 per increment, so it can't be increased more: The kinetic energy is relatively low:
  6. polak7

    Steel rolling process with large deformation - implementing ALE adaptive meshing

    I am simulating a rolling process of steel. The model is 3D with symmetry planes in Y and Z directions. I am using Abaqus Explicit for this. The height reduction of the material is high - around 80%. The simulation runs successfully, however mesh elements deform heavily, so I want to use...
  7. polak7

    Abaqus 6.12 is running very slow suddenly

    Try to manually download from website and upgrade your graphic card's drivers. It helped me.
  8. polak7

    Volumetric locking in CPE3T elements - possible?

    Thank you
  9. polak7

    Volumetric locking in CPE3T elements - possible?

    Is it possible, that volumetric locking will occur during compression of CPE3T elements, if the material is elastic (without plastic behaviour)? The Poisson ratio of the material is 0.3.
  10. polak7

    Time Increment in DFLUX subroutine

    How can I get the time increment in DFLUX subroutine? There is no variable DTIME there. I thought about using some kind of substraction equation where I substract a variable containing total time at the end of the previous increment from the actual total time TIME(2). Do you have any idea how...
  11. polak7

    Different mesh density on the individual part

    Ok, thank you.
  12. polak7

    Different mesh density on the individual part

    Mustaine, I did what you said. I enforced local mesh seed to two cells. Aprproximate element size was 5 and 1 respectively. I marked option: "Do not allow the number of elements to change". After that, when I tried to mesh the part, the message showed up: Did I something wrong...
  13. polak7

    Different mesh density on the individual part

    I see. How can I do it with the partition? It is good that Tie will be added automatically, because it will save a lot of time. And saving time is the purpose why I started this topic.
  14. polak7

    Different mesh density on the individual part

    Hello, Look at the figure: Here are two parts TIE'ed together and the mesh densities on them are different. Is it possible to obtain the same results using one part with partitions? I tried to do that, but I can only change the number of elements on the thickness of partitions.
  15. polak7

    Separation of two bodies

    Thank you, I will check the manual.
  16. polak7

    Separation of two bodies

    Hello Lets say, that I have the situation as in figure below: There are two elastic parts. They are subjected to compression and tension as the arrows indicate. There is some friction between the parts and the substrate. Now, normally parts will separate from each other at some point. I want...
  17. polak7

    Matching the meshes of two parts

    Mustaine, your trick is nice to match meshes, however contact between cylinders doesn't work when I do it. I have problem with my analysis, so I thought that matching these meshes could help. But maybe I should try something else. I will describe my problem. The scheme of the model is given...
  18. polak7

    Matching the meshes of two parts

    I do not know how to much two meshes of different parts together. I want to have nodes from surfaces of these parts in the same positions (at edge at which these surfaces are in contact). Below is the screenshot from Abaqus: I tried changing node global sizes and local seeds, using different...
  19. polak7

    Abacus runs really slow

    Upgrade your graphic card drivers.
  20. polak7

    Ball bounce from the material

    Great clues Mustaine3, thank you. Mass scaling was activated. It was a problem. Now it is ok.

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