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    • Rahul Ponginan

      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. 

Merula

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Merula last won the day on May 13 2017

Merula had the most liked content!

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About Merula

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    Expert User

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  • Gender
    Male
  • Country
    Germany
  • Interests
    Topology, Thermal Simulation, Optimization
  • Are you University user?
    Yes

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  1. Thanks for this clarification. Looking forward to this update.
  2. Hi @Prakash Pagadala, as far as I understood this, maxsucc is a constraint from manufacturing side... Why is it limited to 0 90 45 -45 ? Is there a physical reason for this or just a TODO in the feature list? Best regards
  3. As promised, here are the files. StackingModel (1).out StackingModel (1).fem
  4. I will create an academic example I can share, which I will send to you shortly. Thanks
  5. Sure. .out attached... we noticed that the constraint was violated, so we increased it to see if it would have any results... I attached the .html as well for you to see what changes with every iteration... Unfortunatly I cant share the .fem file. Thanks Prakash. StackingModel.shuf.html StackingModel.out
  6. Hey all, currently I am working on a composite optimization process that involves no 45 and -45° plies. What I experienced was, that with the step 3 (shuffle optimization), optistruct did not consider my constraint of maximum ply successor. Is this a knows issue? Additionally, why can't we define pairing constraints between other plies than the 45 and -45° ? Is there a physical reason why you would do that just with 45 and -45 ? Thanks and best regards Merula
  7. Shape (?) Optimization for 1D Elements

    It could also be a cube, if the spherical movement is the problem. I just can't see how I can implement the optimization setup (i.e. the design variables ) Best regards, Merula
  8. ERROR # 703

    Hey there, if this is a help for everyone, I had a similar issue: Error in input data - Lower bound larger than upper bound***** 0.166667E+01 0.100000E+01 Error in input data - Lower bound larger than upper bound***** 0.166667E+01 0.100000E+01 Error in input data - Lower bound larger than upper bound***** 0.166667E+01 0.100000E+01 Error in input data - Lower bound larger than upper bound***** 0.166667E+01 0.100000E+01 Error in input data - Lower bound larger than upper bound***** 0.166667E+01 0.100000E+01 Error in input data - Lower bound larger than upper bound***** 0.166667E+01 0.100000E+01 Error in input data - Lower bound larger than upper bound***** 0.166667E+01 0.100000E+01 *** ERROR # 703 *** number of design variables = 750432 number of constraints = 20 error code from optimizer = 900 The optimizer failed to find a solution of the optimization problem at the current iteration. This error occurs in module "appdrv". I searched first in my design constraints as I had a design constraint to limit the static displacement, but it was actually the laminate definition and the free sizing boundaries which I set like this: Minimum 5 Maximum 20. Problem was: The Laminate definition in its originally state had more than 5, so it threw an error. Best regards, Merula
  9. Shape (?) Optimization for 1D Elements

    Much appreciated!
  10. Hey guys, I was wondering if it is possible to setup the following optimization problem. Lets say I have a set of nodes and bar elements. This framework has some loads and boundary conditions. I am not sure if the node position of each node is optimal regarding compliance. I would like to define "shapes" for the nodes where I can set some pertubations e.g. Node x can move in a sphere of radius y. I have not seen this kind of optimization although I think it must be possible from an algorithmic point of view. Any suggestions? Thanks!
  11. Skateboard Tutorial

    There you go: https://altairuniversity.com/skateboard/ I made a video series about it:
  12. How to export FE-results for 3D Printing?

    Any News on this ?
  13. How to export FE-results for 3D Printing?

    Rahul, youre the best. Thanks a million! Unfortunately there is no option to export the color of the contour with the .vrml. Do you know something about this: Is there a way to do it? Are there plans in the future? Personally I like the idea of colored prints with the stress contours for discussion or other things like presentations! Best regards!
  14. Export the shape of the layers

    Can't find this script on Script Exchange. Is there a (updated) version available somewhere? Thanks and best regards!
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