Reduced Input
*Node and *Element Cards are removed.
*KEYWORD
*TITLE
hinged shell w/ stop angle
$
$ LSTC Example
$
$ Last Modified: October 16, 1997
$
$ - This problem has a pair of concentrated loads applied to
$ the end nodes of a hinge-jointed shell system.
$
$ - 30 degree stop angle (must add joint stiffness, local coord system)
$
$ - control timestep with maximum 4.15E-06
$
$ Units: lbf-s2/in, in, s, lbf, psi, lbf-in
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Control Ouput
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*CONTROL_TERMINATION
$ endtim endcyc dtmin endeng endmas
2.000E-02
$
*CONTROL_TIMESTEP
$ dtinit scft isdo tslimt dtms lctm erode ms1st
5
$
*DEFINE_CURVE
$ lcid sidr scla sclo offa offo
5
$ abscissa ordinate
0.0 4.15E-06
1.0 4.15E-06
$
$
*DATABASE_BINARY_D3PLOT
$ dt lcdt
5.000E-04
$
*DATABASE_GLSTAT
$ dt
0.0001
$
*DATABASE_JNTFORC
$ dt
1.000E-04
$
*DATABASE_NODOUT
$ dt
0.0001
$
*DATABASE_HISTORY_NODE
$ nid1 nid2
3 4
$
*DATABASE_RBDOUT
$ dt
0.0001
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Revolute Joint
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*CONSTRAINED_JOINT_REVOLUTE
$
$ Create a revolute joint between two rigid bodies. The rigid bodies must
$ share a common edge to define the joint along. This edge, however, must
$ not have the nodes merged together. Rigid bodies A and B will rotate
$ relative to each other along the axis defined by the common edge.
$
$ Nodes 1 and 2 are on rigid body A and coincide with nodes 9 and 10
$ on rigid body B, respectively. (This defines the axis of rotation.)
$
$ The relative penalty stiffness on the revolute joint is to be 1.0,
$ the joint is well lubricated, thus no damping at the joint is supplied.
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$ n1 n2 n3 n4 n5 n6 rps damp
1 9 2 10 1.0
$
$
$
$$$$$$$$$$$$ Define a joint stiffness for the revolute joint described above.
$
$ Attributes of the joint stiffness:
$ - Used for defining a stop angle of 30 degrees rotation
$ (i.e., the joint allows a positive rotation of 30 degrees and
$ then imparts an elastic stiffness to prevent futher rotation)
$ - Define between rigid body A (part 1) and rigid body B (part 2)
$ - Define a local coordinate system along the revolute axis
$ on rigid body A - nodes 1, 2 and 3 (cid = 5). This is used to
$ define the revolute angles phi (PH), theta (T), and psi (PS).
$ - The elastic stiffness per unit radian for the stop angles
$ are 100, 10, 10 for PH, T, and PS, respectively.
$ - Values not specified are not used during the simulation.
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*CONSTRAINED_JOINT_STIFFNESS_GENERALIZED
$ jsid pidA pidB cidA cidB
1 1 2 5 5
$
$ lcidPH lcidT lcidPS dlcidPH dlcidT dlcidPS
$
$ esPH fmPS esT fmT esPS fmPS
100.0 10.0 10.0
$
$ nsaPH psaPH nsaT psaT nsaPS psaPS
30.0
$
$
*DEFINE_COORDINATE_NODES
$ cid n1 n2 n3
5 1 2 3
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Loading
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*LOAD_NODE_POINT
$ nid dof lcid sf cid m1 m2 m3
3 3 1-1.000E+00
4 3 1-1.000E+00
$
*DEFINE_CURVE
$ lcid sidr scla sclo offa offo
1
$ abscissa ordinate
0.00000000E+00 1.00000000E+00
1.00000000E+00 1.00000000E+00
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Parts and Materials
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*PART
$ pid sid mid eosid hgid grav adpopt
rotating
1 1 1 0
fixed
2 1 2 0
$
$
$$$$ Materials
$
*MAT_RIGID
$
$ mid ro e pr n couple m alias
1 7.000E-04 3.000E+07 3.000E-01
$
$ cmo con1 con2
$
$ lco/a1 a2 a3 v1 v2 v3
$
$
*MAT_RIGID
$
$ mid ro e pr n couple m alias
2 7.000E-04 3.000E+07 3.000E-01
$
$ cmo con1 con2
1.0 7 7
$
$ lco/a1 a2 a3 v1 v2 v3
$
$
$$$$ Sections
$
*SECTION_SHELL
$ sid elform shrf nip propt qr/irid icomp
1 2 3.0
$ t1 t2 t3 t4 nloc
0.1 0.1 0.1 0.1
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Nodes and Elements
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
*END