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This example is a general combined nonlinear problem with contact, plasticity and failure. Nonlinear Example 3 from A Roadmap to Linear an Nonlinear Implicit Analysis in LS-DYNA by George Laird and Satish Pathy,  presented at the 2017 Salzburg conference.

Keywords

*BOUNDARY_SPC_SET_ID
*CONTACT_AUTOMATIC_SINGLE_SURFACE_MORTAR_ID
*CONTROL_ACCURACY
*CONTROL_IMPLICIT_AUTO
*CONTROL_IMPLICIT_DYNAMICS
*CONTROL_IMPLICIT_GENERAL
*CONTROL_IMPLICIT_SOLUTION
*CONTROL_OUTPUT
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_CROSS_SECTION_PLANE_ID
*DATABASE_EXTENT_BINARY
*DATABASE_GLSTAT
*DATABASE_SPCFORC
*DEFINE_CURVE_TITLE
*DEFINE_CURVE_TITLE
*ELEMENT_SOLID (ten nodes format)
*END
*INITIAL_STRESS_SECTION
*KEYWORD
*LOAD_SEGMENT_SET_ID
*MAT_ADD_EROSION_TITLE
*MAT_PLASTIC_KINEMATIC_TITLE
*MAT_SIMPLIFIED_JOHNSON_COOK_TITLE
*NODE
*PART
*SECTION_SOLID_TITLE
*SET_NODE_LIST_TITLE
*SET_PART_LIST_TITLE
*SET_SEGMENT_TITLE

Reduced Input

*KEYWORD
*TITLE
Contact with Bolt Preload (INITIAL_STRESS_SECTION) with Fold Over
*CONTROL_ACCURACY
                                       1
*CONTROL_IMPLICIT_AUTO
         1                                    0.05    
*CONTROL_IMPLICIT_DYNAMICS
         1       0.6      0.38     
*CONTROL_IMPLICIT_GENERAL
         1      0.05        
*CONTROL_IMPLICIT_SOLUTION
                                                                     
                                       2
         
         
*CONTROL_OUTPUT
         
         
                                                 2  
         
*CONTROL_TERMINATION
       1.0        
*DATABASE_BINARY_D3PLOT
    1.0E-3       
         
*DATABASE_GLSTAT
    1.0E-3         3      
*DATABASE_SPCFORC
    1.0E-3         3
*DATABASE_EXTENT_BINARY
        
         
         8                           
         
*PART
         1         1        10         
*SECTION_SOLID_TITLE
Just your standard solid element formulation for nonlinear implicit
         1        -1         
*MAT_SIMPLIFIED_JOHNSON_COOK_TITLE
STEEL WROUGHT STAINLESS 304L BAR ANNEALED (courtesy of Varmit Al)
        10   7.92E-9  193000.0      0.29       
     15.14    1098.0   0.28894       
*MAT_ADD_EROSION_TITLE
STEEL WROUGHT STAINLESS 304L BAR ANNEALED (courtesy of Varmit Al)
        10                                    0.18     
                                    0.09  
         
         
*PART
         2         1         1        
*PART
         3         1         1       
*MAT_PLASTIC_KINEMATIC_TITLE
Standard Steel (Bolt / Bottom Plate)
         1   7.85E-9    2.0E+5       0.3     300.0     500.0       
      
*DEFINE_CURVE_TITLE
Bolt Preload Ramp It Up!
         1                         100.0     
                 0.0                 0.0
                0.25                 1.0
*DEFINE_CURVE_TITLE
Horizontal Lever Load (after bolt preload process)
         2        
                 0.0                 0.0
                0.25                 0.0
                 1.0                 1.0
*DATABASE_CROSS_SECTION_PLANE_ID
         1INITIAL_STRESS
         3 -978.9995 -964.0373 -996.9478 -978.9995 -964.0373 -995.9478      20.0
      
*SET_PART_LIST_TITLE
Cross Section
         3      
         3        
*BOUNDARY_SPC_SET_ID
        24FIXED
         2                   1         1         1        
*SET_NODE_LIST_TITLE
FIXED
         2       0.0       0.0       0.0       0.0MECH
*ELEMENT_SOLID (ten nodes format)
*NODE
*LOAD_SEGMENT_SET_ID
         1Fold Over Failure Load
         1         2       5.0       0.0
*CONTACT_AUTOMATIC_SINGLE_SURFACE_MORTAR_ID
         1General Single-Surface Contact
         0         0         0         4         0         0         0         0
       0.3       0.0       0.0       0.0       0.0         0       0.01.00000E20
       1.0       1.0       0.0       0.0       1.0       1.0       1.0       1.0
         0       0.1         0     1.025       2.0         2         0         1
       0.0         0         0         0         0         0       0.0       0.0
         1         1       0.0       0.0                           0.0         0
*INITIAL_STRESS_SECTION
         1         1         1         3         0
*SET_PART_LIST_TITLE
Cross Section@_1
         4       0.0       0.0       0.0       0.0MECH
         3         0         0         0         0         0         0         0
*SET_PART_LIST_TITLE
Cross Section@_2
         5       0.0       0.0       0.0       0.0MECH
         1         0         0         0         0         0         0         0
*SET_PART_LIST_TITLE
SET_PROPERTIES_0000000006
         6       0.0       0.0       0.0       0.0MECH
         1         2         3         0         0         0         0         0
*SET_SEGMENT_TITLE
Pressure Application
         1       0.0       0.0       0.0       0.0MECH
*END

Figures

figure_screw_0ms.png

figure_screw_60ms.png

Animated Result

contact3

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