LS Dyna

LS Dyna

Topics related to LS-DYNA, Autodyn, Explicit STR and more.

MAT 318 from PolyUMod models library

    • valerym.m5
      Subscriber

      Will it be possible to use model 318 for EFG, SPG, SPH formulations ?


    • valerym.m5
      Subscriber

      Previously, when using the polymod library, it was possible to use the following parameters:

      ODE solver id (ODE)

      Jacobian calculation method (JAC)

      Varying these parameters often helped solve the tasks.

      in the latest version LS-DYNA (318 model), these parameters are not available.

      Will they be available in future versions of this model?

      If these parameters are not available, it would be useful to understand:

      1. Why did they become unavailable to users?

      2. What values ​​of these parameters does the program use "by default"?

    • valerym.m5
      Subscriber
      here is another example where the problem is solved using "old" external models from the library PolyUMod and an old version of ls-dyna.
      Six_Absorber_1.2_Dr-3_Initital-TNV_Mortar-TNM.key
      https://drive.google.com/file/d/12PuM3x4Dzhp3kP6pHU9Tbw-PexEOB1JG/view?usp=sharing


      the same model is not solved in the new version of ls-dyna, where the built-in material model 318 is used
      0_05.key
      https://drive.google.com/file/d/1pJViLRThhYFLWui1N7erdZcY6pacPz_D/view?usp=sharing 


      $# Material Model: PolyUMod-Three-Network (Mat318)
      https://drive.google.com/file/d/14B60mxRfUwm-M6VeuTtMSjAgqwcm2jqT/view?usp=sharing

       


      ======================================

       E r r o r   t e r m i n a t i o n                             10/18/24 23:35:12
      forrtl: severe (157): Program Exception – access violation
      Image              PC                Routine            Line        Source             
      lsdyna_dp.exe      00007FF787286B82  TET_FORCEU               5728  dyn38.F
      lsdyna_dp.exe      00007FF787325C9E  TET_SLD1IP               4407  dyn38.F
      lsdyna_dp.exe      00007FF7899E87CB  SOLDE                    1694  dynpe.F
      lsdyna_dp.exe      00007FF7841299EF  FEM3D_DO235              2977  fem3d_a.F
      lsdyna_dp.exe      00007FF784128F2D  FEM3D_DO235D             2705  fem3d_a.F
      libiomp5md.dll     00007FF92CFB81D3  Unknown               Unknown  Unknown
      libiomp5md.dll     00007FF92CF06E97  Unknown               Unknown  Unknown
      libiomp5md.dll     00007FF92CF081F1  Unknown               Unknown  Unknown
      libiomp5md.dll     00007FF92CEC2754  Unknown               Unknown  Unknown
      lsdyna_dp.exe      00007FF784128003  FEM3D_DO235D             2672  fem3d_a.F
      lsdyna_dp.exe      00007FF7840EEAF6  FEM3D                    9738  fem3d.F
      lsdyna_dp.exe      00007FF7840E6D78  SOLTN                     441  fem3d.F
      lsdyna_dp.exe      00007FF7842225D8  OVERLY                    277  dyn0.F
      lsdyna_dp.exe      00007FF782DA47BF  LSDYNA1                   965  dynm.F
      lsdyna_dp.exe      00007FF782DA4129  MAIN__                   2060  dynm.F
      lsdyna_dp.exe      00007FF790E63BE2  Unknown               Unknown  Unknown
      lsdyna_dp.exe      00007FF79181BC08  Unknown               Unknown  Unknown
      KERNEL32.DLL       00007FF9A70E257D  Unknown               Unknown  Unknown
      ntdll.dll          00007FF9A884AA58  Unknown               Unknown  Unknown

       

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