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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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  1. Reference vector

    Got it George! Thank you very much
  2. Reference vector

    Attached are the images, where axis 1 & 2 define the fiber direction 1 & 2 respectively and L is the loading direction. So I would assume these values case1: vx=1; vy=0; vz=0 ( or should it be vx=0; vy=1;vz=0) phii = 0; alphai =90 case2: vx=1; vy=1; vz=0 with phii=0 or is it something different? I am sorry if I am totally wrong, because I am a bit confused even though reading the manual.
  3. Reference vector

    Currently I am running with Vx=1; vy=0; vz=0. If the fiber axis are not loaded parallel to one of the fibers then local skew would help me, but i'm a bit curious with other conditions as vx=0 ; vy=1; vz=0 vx=1; vy=1;vz=0
  4. Reference vector

    Hi! I have implemented typ 16 property for a fabric material and now creating a material card from tensile test results. I am a bit confused of the ref vector in the property card. I understand, if Vx =1 the direction of fiber is aligned with global X-axis, but how will it assign the x-axis of fiber to global axis? What happens with the other cases, if vx=0 ; vy=1; vz=0 vx=1; vy=1;vz=0 I have performed the tens. test by having a fabric(warp, weft fibers separated 90deg) whose warp and weft are parallel and perpendicular respectively to the loading direction. Any answers regarding this are highly appreciable. Thanks in advance
  5. animation results not in a sequence

    Ok George, will try and let you know if that's resulting to the similar thing.
  6. animation results not in a sequence

    Hi George, Thanks for verifying. Unfortunately I can't have access to those files out of office, sorry for that. I had a look at engine out file. In short, animation file of 001. 002 states are repeated after the end state.. Looks like ANIMATION FILE: tensile_testA001 WRITTEN ANIMATION FILE: tensile_testA002 WRITTEN ANIMATION FILE: tensile_testA003 WRITTEN ANIMATION FILE: tensile_testA004 WRITTEN .... .... ANIMATION FILE: tensile_testA996 WRITTEN ANIMATION FILE: tensile_testA997 WRITTEN ANIMATION FILE: tensile_testA998 WRITTEN ANIMATION FILE: tensile_testA999 WRITTEN ANIMATION FILE: tensile_testA001 WRITTEN RESTART FILES: tensile_test_0001_[0001-0004].rst WRITTEN ------------- ANIMATION FILE: tensile_testA002 WRITTEN
  7. animation results not in a sequence

    Hi George, has sent animation file and engine file through dropbox
  8. Hi, My model is run till 1 sec and at animation file write interval of 1 millisecond. The animation file displays 9.99E+002 and 1E+003 at the beginning and then starts with 2, 3, 4..... milli seconds. I really cannot figure why it shows the two states which are supposed to be at final. Could anyone give a hint, what might be the reason? checked with the engine file, to my knowledge everything seems fine.
  9. 3 node shell

    Hi, I have been working on fabric material meshed with all 3 noded R-tria shell elements for non linear analysis. I use LAW 58 material for this component and property type 16. In property, in the formulation for 3 node shell i used standard triangle(C0) till now and the fabric behaviour was fine but not so close to physical behavior. I see some other 2 formulations based on discrete kirchoff theory. Can someone please tell what is the difference between DKT18 and DKT_S3, in theory manual there is no technical difference.
  10. increased mass

    Thanks George
  11. increased mass

    Hi George, thanks for this option. Can one plot TH for mass of individual springs rather than the whole part of springs? I do not find the option for the single spring element
  12. increased mass

    Hi George, Could you please send your file, I will check with my HW version. I am using version 13 and when I calculate the mass in hypermesh it shows 0 because stitch type is not supported.
  13. increased mass

    Hi George, Thank you. I have sent the file through Dropbox
  14. increased mass

    Hi, I have the following questions. 1. I am trying to get the stress strain curves for 2 parts, one with all shells and other with all tetras. I could see the TH plots only for the individual elements, rather I am looking for the complete part. Is it really possible? 2. I have a couple of spring beam elements for which I have added mass (not input per length). When I check for the mass vs time I could see an increased mass of about 15 times of my assigned value (no ramp but constant mass from 0 msec). Could anyone tell what is causing this? Any suggestion is highly appreciable
  15. scale factor in LAW70

    Hi George, If I input a set of stress strain data into the function and give the scale factor as 1, the values remain same and if I mention the scale factor as 1.5, all the stress and strain data will be increased by 20%, am I correct? Is it possible to scale only Abscissa or Ordinate?