Elastic Beams

A simply supported half-symmetric beam is analyzed using beam, shell and solid (8 node brick and 10 node tetrahedral) elements. Linear Example 1 from A Roadmap to Linear an Nonlinear Implicit Analysis in LS-DYNA by George Laird and Satish Pathy.

*BOUNDARY_SPC_NODE
*CONTROL_IMPLICIT_GENERAL
*CONTROL_IMPLICIT_SOLUTION
*CONTROL_OUTPUT
*CONTROL_SHELL
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_EXTENT_BINARY
*DEFINE_COORDINATE_SYSTEM
*DEFINE_COORDINATE_SYSTEM
*DEFINE_CURVE_TITLE
*ELEMENT_BEAM
*ELEMENT_SHELL
*ELEMENT_SOLID (ten nodes format)
*END
*KEYWORD
*LOAD_NODE_POINT
*LOAD_SEGMENT
*LOAD_SHELL_ELEMENT
*MAT_ELASTIC_TITLE
*NODE
*PART
*SECTION_BEAM_TITLE
*SECTION_SHELL_TITLE
*SECTION_SOLID_TITLE

*KEYWORD
*TITLE
Roadmap to Linear and Nonlinear Implicit - Linear Elastic
*CONTROL_IMPLICIT_GENERAL
         1       1.0        
*CONTROL_IMPLICIT_SOLUTION
         1       
        
         
        
*CONTROL_OUTPUT
        
       
                                                 1 
        
*CONTROL_SHELL
     
                   1   
        
        
*CONTROL_TERMINATION
       1.0    
*DATABASE_BINARY_D3PLOT
       1.0     

*DATABASE_EXTENT_BINARY
                            -3        
                             9       
         8               
       
*PART
         1         1         1         
*SECTION_SOLID_TITLE
Hex
         1        18        
*MAT_ELASTIC_TITLE
Al
         1               1.0E7       0.3      
*PART
         2         2         1       
*SECTION_SOLID_TITLE
Tet
         2        16        
*PART
         3         3         1         
*SECTION_SHELL_TITLE
Shell with Lobatto Integration (see *Control Shell)
         3        21     0.833         3      
       0.5                  
*PART
         4         4         1        
*SECTION_BEAM_TITLE
Beam
         4         4      0.85         4               
       0.5       0.5       0.5       0.5
*BOUNDARY_SPC_NODE
*DEFINE_COORDINATE_SYSTEM
         3       5.0      0.25       0.0 -0.006246      0.25       0.0         0
       5.0  5.256246       0.0
*DEFINE_COORDINATE_SYSTEM
         4       5.0      1.75       0.0 -0.297405      1.75       0.0         0
       5.0  7.047405       0.0
*DEFINE_CURVE_TITLE
Load Curve
         1         0       1.0       1.0       0.0       0.0         0         0
                 0.0                 0.0
                 1.0                 1.0
*ELEMENT_SOLID (ten nodes format)
*ELEMENT_SHELL
*ELEMENT_BEAM
*NODE
*LOAD_NODE_POINT
*LOAD_SEGMENT
*LOAD_SHELL_ELEMENT
*END