A framed structure deforming under a load applied on one node. The frame is pinned to ground at two nodes. Arc-length method is used to capture the post-buckling behavior of the structure. Example 7 from Introductory Manual for LS-DYNA Users by James M. Kennedy.
*BOUNDARY_SPC_NODE *CONTROL_IMPLICIT_AUTO *CONTROL_IMPLICIT_GENERAL *CONTROL_IMPLICIT_SOLUTION *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DATABASE_GLSTAT *DATABASE_HISTORY_NODE *DATABASE_MATSUM *DATABASE_NODAL_FORCE_GROUP *DATABASE_NODFOR *DATABASE_NODOUT *DEFINE_CURVE *ELEMENT_BEAM *END *KEYWORD *LOAD_NODE_POINT *MAT_ELASTIC *NODE *PART *SECTION_BEAM *SET_NODE_LIST *TITLE
*KEYWORD
*TITLE
Lee's Frame Buckling Problem
*CONTROL_IMPLICIT_AUTO
1 20 5 1.000e-09
*CONTROL_IMPLICIT_GENERAL
1 0.003000 2 100 2 1
*CONTROL_IMPLICIT_SOLUTION
6 30 15 1.000e-06 1.000e-05 1.000e-05 0.990000 1.000000
2 1 1 2
0 1 0.0 1 2
*CONTROL_TERMINATION
1.000000 0 0.0 0.0 0.0
*DATABASE_GLSTAT
0.001000 1
*DATABASE_MATSUM
0.001000 1
*DATABASE_NODFOR
1.0000e-04 1
*DATABASE_NODOUT
1.0000e-04 1
*DATABASE_BINARY_D3PLOT
0.010000 0 2
*DATABASE_NODAL_FORCE_GROUP
1
*DATABASE_HISTORY_NODE
56 36 1
*DEFINE_CURVE
1 0 1.000000 1.000000 0.0 0.0
0.0 0.0
1.00000000 5.0000000e+04
*ELEMENT_BEAM
*NODE
*BOUNDARY_SPC_NODE
*PART
1 1 1
*SECTION_BEAM
1 1 0.830000 5 0 0.0
0.030000 0.030000 0.02 0.02
*MAT_ELASTIC
1 7850.0007.1740e+10 0.0 0.0 0.0 0.0
*LOAD_NODE_POINT
56 2 1 -1.000000
*SET_NODE_LIST
1 0.0 0.0 0.0 0.0
1 6 36 56
*END
