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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. 

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Found 2 results

  1. Some doubts about material LAW38

    Hi all, From the manual of /mat/law38, the curves are always nominal stresses versus engineering strains. However, from the manual of /prop/solid, It is recommended to use IHKT = 2 with HEPH and Lagrange type total strain, Ismstr = 10 for foam or rubber materials like laws 38, 42, 69, and 82. I think Ismstr=10 is not small strain formulation, so true stress vs true strain curve should be used. This two comments seem incompatible. How to do this? How to model package foam with LAW38? Thank you Roy
  2. Hi all, Which material model should be used for a package foam when doing package dropping simulation? From the help manual, both /mat/law38 and /mat/law70 are visco-elastic Foam Tabulated material. What's the difference between this two models? Is there any example about package dropping simulation? Best Wishes Roy
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