Spring II
This is an example for a spring-mass simulation. Its purpose is to learn about discrete elements. A nonlinear elastic material with user defined force-displacement curve is used.
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Spring II
This is an example for a spring-mass simulation. Its purpose is to learn about discrete elements. A nonlinear elastic material with user defined force-displacement curve is used.
*BOUNDARY_PRESCRIBED_MOTION_NODE *BOUNDARY_SPC_NODE *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DATABASE_DEFORC *DATABASE_HISTORY_NODE_SET *DATABASE_NODOUT *DEFINE_CURVE *ELEMENT_DISCRETE *ELEMENT_MASS *END *KEYWORD *MAT_SPRING_NONLINEAR_ELASTIC *NODE *PART *SECTION_DISCRETE *SET_NODE_LIST *TITLE
*KEYWORD
*TITLE
SPRING-MASS Simulation
$
$ learn discrete elements, material for discrete elements
$ units: mm, s, ton, N
$ A. Tabiei, 3/10/98
$
*CONTROL_TERMINATION
$ ENDTIM
10.000E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*DATABASE_HISTORY_NODE_SET
1
*SET_NODE_LIST
1
2 3 4
*DATABASE_NODOUT
0.101E-01
*DATABASE_DEFORC
0.101E-01
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*DATABASE_BINARY_D3PLOT
$ DT/CYCL
0.100E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*PART
Spring
$ PID SID MID
2 3 2
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*SECTION_DISCRETE
$ SID DRO KD V0 CL FD
3 0 0.000E+00 0.000E+00 0.000E+00 0.000E+00
$ CDL TDL
0.000E+00 0.000E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*MAT_SPRING_NONLINEAR_ELASTIC
$ MID LCD
2 2
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*NODE
$ NODE X Y Z
1 0.000000000E+00 0.000000000E+00 0.000000000E+00
2 0.100000000E+02 0.000000000E+00 0.000000000E+00
3 0.200000000E+02 0.000000000E+00 0.000000000E+00
4 0.300000000E+02 0.000000000E+00 0.000000000E+00
5 0.400000000E+02 0.000000000E+00 0.000000000E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*ELEMENT_DISCRETE
$ EID PID N1 N2 VID S PF OFFSET
1 2 1 2 0 0.1000000E+01 0 0.0000000E+00
2 2 2 3 0 0.1000000E+01 0 0.0000000E+00
3 2 3 4 0 0.1000000E+01 0 0.0000000E+00
4 2 4 5 0 0.1000000E+01 0 0.0000000E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*ELEMENT_MASS
$ EID NID MASS
5 2 5.0000002E-04
6 3 5.0000002E-04
7 4 5.0000002E-04
8 5 5.0000002E-04
9 1 5.0000002E-04
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*BOUNDARY_SPC_NODE
$ NID/NSID CID DOFX DOFY DOFZ DOFRX DOFRY DOFRZ
1 0 1 1 1 1 1 1
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*BOUNDARY_PRESCRIBED_MOTION_NODE
$ NODE DOF VAD LCID SF
5 1 2 1 1.00E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*DEFINE_CURVE
1
0.0 0.0
10.0000000000000E+00 10.00000000000E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*DEFINE_CURVE
2
$ DISPLACEMENT FORCE
-2.5000000000000E+00 -0.20000000000E+00
-2.0000000000000E+00 -0.17500000000E+00
-1.5000000000000E+00 -0.15000000000E+00
-1.0000000000000E+00 -0.10000000000E+00
-0.5000000000000E+00 -0.02500000000E+00
0.0 0.0
0.50000000000000E+00 0.025000000000E+00
1.00000000000000E+00 0.100000000000E+00
1.50000000000000E+00 0.150000000000E+00
2.00000000000000E+00 0.175000000000E+00
2.50000000000000E+00 0.200000000000E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*END