Tension V — Welcome to LS-DYNA Examples

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With this series of examples you can study a specimen under tension and see the effects of different number of elements through thickness and different materials. Fifth example shows usage of shell elements and user defined material with piecewise linear plasticity and specified failure strain.

Keywords

*BOUNDARY_PRESCRIBED_MOTION_NODE
*BOUNDARY_SPC_NODE
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DATABASE_BINARY_D3PLOT
*DATABASE_CROSS_SECTION_PLANE
*DATABASE_ELOUT
*DATABASE_EXTENT_BINARY
*DATABASE_GLSTAT
*DATABASE_HISTORY_SHELL
*DATABASE_NODAL_FORCE_GROUP
*DATABASE_NODFOR
*DATABASE_SECFORC
*DEFINE_CURVE
*ELEMENT_SHELL
*END
*KEYWORD
*MAT_PIECEWISE_LINEAR_PLASTICITY
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST
*SET_PART_LIST
*TITLE

Reduced Input

  *KEYWORD
  *TITLE
  TENSION TEST SIMULATION, mat=24, displacement
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *CONTROL_TIMESTEP
      0.0000    0.9000
  *CONTROL_TERMINATION
      0.0100
  *DATABASE_EXTENT_BINARY
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  $        i         i         i         i         i         i         i         i
  $    neiph     neips    maxint    strflg    sigflg    epsflg    rltflg    engflg
                                    
  $        i         i         i
  $   cmpflg    ieverp    beamip
                     1
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *DATABASE_BINARY_D3PLOT
     0.0010
  *DATABASE_GLSTAT
     0.00001
  *DATABASE_NODFOR
     0.00001
  *DATABASE_ELOUT
     0.00001
  *DATABASE_SECFORC
     0.00001
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *DATABASE_NODAL_FORCE_GROUP
          2
  *SET_NODE_LIST
          2
  29,30,31,32,33,38,39
  *DATABASE_HISTORY_SHELL
  71,72,73,74,75,76,77,78
  79,80
  *SET_PART_LIST
  1
  1
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *DATABASE_CROSS_SECTION_PLANE
           1         5        10        10       200        10        10
           5       -10       -10        20        20
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *MAT_PIECEWISE_LINEAR_PLASTICITY
  $      MID        RO         E        PR       SIG      ETAN      FAIL
           1 7.890E-09 2.100E+05 3.000E-01 3.150E+02 0.000E+00     0.660
  $        C         P      LCSS
  $ note that if LCSS is defined the EPS vs ES is ignored
  $ if C and P are set to zero, no strain rate effect will be considered
        40.0         5         0
  $ (EPS) effective plastic strain vs efftive stress (ES)
         0.0     0.019      0.05     0.165      0.33     0.495     0.625       1.0
         315       315     427.8     500.8     504.3     506.5       400         0
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *SECTION_SHELL
           1         2 0.000E+00 3.000E+00 
   2.670E-00 2.670E-00 2.670E-00 2.670E-00
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *PART
  SHELL
           1         1         1
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *DEFINE_CURVE
           1
  0.00000000000000E+00 0.0000000000000E+00
  0.01000000000000E+00 50.000000000000E+00
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *BOUNDARY_SPC_NODE
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *BOUNDARY_PRESCRIBED_MOTION_NODE
  $---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  *NODE
  $
  *ELEMENT_SHELL
  $
  *END

Figures

image01.gif

image02.gif

Animated Result

Result

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