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      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 


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akshaysp.09 last won the day on December 14 2017

akshaysp.09 had the most liked content!

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  1. Determine max./min. element and node ids

    Hello @Ray_Airbus, Greetings!!! I believe you could open the .fem file using notepad, and scroll down to Node cards and Element Cards. There you could see all node/element number in ascending order. This works for .key file(LS-Dyna). Hopefully, it should work for other platforms as well. If you find any other, convenient way, please do share. Thanks & Warm Regards, Akshay S Patil
  2. How to ensure elements are detached after detaching

    Hello @S R Arun, Greetings!!! You could check it by using the tool Edges. It could be found in Tool>Edges or Shift+f3. Change the tolerance value depending on your model, and check for PREVIEW EQUIV. If nodes are highlighted, then they are not attached. Thanks & Warm Regards, Akshay S Patil
  3. Hello @Jouher, Greetings!! When you say preprocessing stage, do you mean applying a pre-load to a component/part? If that's the case, you might want to look into the topic of explicit dynamic relaxation. http://ftp.lstc.com/anonymous/outgoing/jday/bolt_preload3.pdf If you are using LS-Dyna, you can have created a output file, wherein you can extract the data before the actual simulation begins (i.e during pre-load period). You can find something similar for RADIOSS I believe. (>DYREL option) Please, let us know, if you find a proper solution.
  4. cylindrical coordinate system

    Hello @karmanya, Greetings!! I believe there are still working on to include that option for LS-Dyna user profile, as its available for Nastran, ANSYS, Madymo. May be LS-Dyna is next Thanks & Warm Regards, Akshay S Patil
  5. Penetration in model after defining thickness

    Hello @Sebastian Henao, In you model, check for edges option with tolerance of 0.1 I am not familiar with interaction of Radioss. If you find it, please do share the information. Thanks & Warm Regards, Akshay S Patil
  6. Penetration in model after defining thickness

    Hello @Sebastian Henao, Greetings!!! When you do pentration/intersection check, you could isolate the intersecting/penetrating elements, (the option in black box) In you model, in the helighted region, there is a free edge, (fix it by equivalence the node in that region) , and in some other areas as well. Also, there are a couple of duplicate elements in your model, which needs to be deleted. Therefore, in general, before you do penetration/intersection check, Check for connectivity, duplicates, elemental quality criteria, and normals. Regarding, single side thickness, the mesh needs to be one of the sides, instead of the mesh being at the middle, and you need to make changes in the property, in case of LS-Dyna NLOC. Hopefully, this resolves the issue. Thanks & Warm Regards, Akshay S Patil
  7. Penetration in model after defining thickness

    Hello @Sebastian, Greetings!!! Penetration/ Intersection check is a must, before you set up for run. However, to resolve those issues, I would suggest you to manually translate the elements/nodes or use element offset (in 2D>shell offset) option, instead of using automatic fix tool. To avoid penetration/intersection , make sure, your mesh is on the mid-plane. Suppose, there is penetration/intersection in the geometry itself, then you need to make educated guess to resolve it. "When defining the thickness of a surface, this surface is assumed to be a mid plane so the thickness is distributed equally to both sides? Can this be modified?" For this Q, you could define single side thickness, instead of assigning thickness to mid-surface mesh, and sometimes, this could be used to avoid penetration/intersection. You could share your model, so that we could be more helpful. Also, let me know, if there are any corrections in what I told. Thanks & Warm Regards, Akshay S. Patil
  8. How to automatically merge nodes within some distance?

    Hello @Kaushik Greetings!!! Before, you use any options: defeature or autocleanup, make sure you have surfaces. In case,if you have solid component, you could generate surfaces out of them, as its easy to modify surface than solids. I would suggest you to use the option defeature ( Geom>defeature). In defeature option, you need to use surface fillets and edge fillets, Plug in the suitable range for minimum and maximum radius values. This should be able to helpful.
  9. Can not use shortcut keys in win10

    Hell Jenny, Greetings!!! Are you using HyperMesh on laptop? Usually, to use function keys, you need to press function key...like function key+F5. Thanks & Warm Regards, Akshay S Patil
  10. File Not opening- Corrupt

    Hello All, I was trying to mesh one of the geometry. And for some unknown reason HyperMesh-17 crashed. As usual, it gave an option to save the file, and I saved it. Before, HyperMesh got crashed, I was using the option Replace. But, when I try to open that .hm file, its showing an error - in the status bar. Is there a way, I could recover the file by my own, by exporting the .fem or .key file, and editing it. I want to learn how to recover the file, if possible. HM Version:
  11. Meshing by layers with irregular shape

    Hello Dilen, Greetings!!! I believe you are talking about the connectivity between (sharing common nodes) between pink and yellow part? That is what you mean by concentric here, right? In either case, you could mesh the pink part first using Auto-mesh option. After that, you could use the Auto-mesh option again for yellow part as well. If you are using HM-17, the connectivity should be maintained. Nevertheless, you need to check the connectivity using Edges option . If you have connectivity issue, use Replace option to connect the nodes, Project to line option to align the nodes back to boundary. Above steps are general steps, which are applicable to most of the cases. Thanks & Warm Regards, Akshay S Patil
  12. Menu not shown correctly since windows update

    Hello @OptiStruct , Greetings!!! I have experienced similar issue in the past, but it's completely random. Try changing View - Panel Configuration - Switch between Top/Bottom. Also, trying closing/opening HM. If they don't work , you can follow the instructions from the below post, that should work.
  13. Calculation of 2D Aspect Ratio

    Hello tinh, Greetings!!! I believe we are obtaining A/P ratio of 4.23 when the settings option is set to MINIMAL NORMALIZED HEIGHT in HM. Source: https://www.engmorph.com/2d-element-aspect-ratio-diff-simula
  14. Splitting the elements with a plane

    Hello @raskolnikov, Greetings!!! I believe HM doesn't have the option (N1.N2,N3) to split the elements, apart from splitting line . User defined script might be an option, but I am not sure about it. Anyway, its much more easier to re-mesh the part rather than splitting a bunch of elements. If you found do find a solution, please let me know as well. Thanks & Warm Regards, Akshay S Patil
  15. How to create a circle surface in HM

    Hello Pohan, To create the a circular surface using spin option, you need to a rotate a line with a pivot point and the surface generated is controlled by angles. Also, make sure your visualization is shaded.