A dome has an impulsive pressure load. The dome contains shell and brick element joined with shell-brick interfaces.
*CONSTRAINED_SHELL_TO_SOLID Impulsively Loaded Cap with Shells and Solids LS-DYNA Manual Section: *CONSTRAINED_SHELL_TO_SOLID Additional Sections: *LOAD_SEGMENT Example: Impulsively Loaded Cap with Shells and Solids Filename: constrained.shell_solid.dome.k Description: A dome has an impulsive pressure load. The dome contains shell and brick element joined with shell-brick interfaces. Model: Only 1/4 of the dome is modeled due to symmetry. The dome shells are Hughes-Liu shell elements with three integration point through the thickness. Four shell elements have a pressure load of 5,308 psi over 0.0017246 square inches. The termination time is 0.0004 seconds. Input: The model contains one shell-brick group that has 7 shell nodes tied to 5 brick node (*CONSTRAINED_SHELL_TO_SOLID). The model contains four pressure surfaces (*LOAD_SEGMENT). Five nodes are written to the time history ASCII database file nodout (*DATABASE_HISTORY_NODE, *DATABASE_NODOUT). Results: The plots show the response of the dome. Reference: T. Littlewood
*CONSTRAINED_SHELL_TO_SOLID *CONTROL_OUTPUT *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DATABASE_BINARY_D3THDT *DATABASE_ELOUT *DATABASE_EXTENT_BINARY *DATABASE_GLSTAT *DATABASE_HISTORY_NODE *DATABASE_HISTORY_SHELL *DATABASE_HISTORY_SOLID *DATABASE_NODOUT *DEFINE_CURVE *ELEMENT_SHELL *ELEMENT_SOLID *END *KEYWORD *LOAD_SEGMENT *MAT_ELASTIC *NODE *PART *SECTION_SHELL *SECTION_SOLID *SET_NODE_LIST *TITLE
*KEYWORD
*TITLE
Impulsively Loaded Cap with Shell-Brick Interfaces
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$ LSTC Example
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$ Last Modified: September 4, 1997
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$ Units: lbf-s^2/in, in, s, lbf, psi, lbf-in
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$$$$ Control Ouput
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$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
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*CONTROL_TERMINATION
$ endtim endcyc dtmin endneg endmas
0.0004
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*CONTROL_OUTPUT
$ npopt neecho nrefup iaccop opifs ipnint ikedit
1 3
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*DATABASE_BINARY_D3PLOT
$ dt lcdt
0.00001
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*DATABASE_BINARY_D3THDT
$ dt lcdt
5.000E-07
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*DATABASE_EXTENT_BINARY
$ neiph neips maxint strflg sigflg epsflg rltflg engflg
1
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$ cmpflg ieverp beamip
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*DATABASE_ELOUT
$ dt
5.000E-07
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*DATABASE_HISTORY_SHELL
$ id1 id2 id3 id4 id5 id6 id7 id8
1
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*DATABASE_HISTORY_SOLID
$ id1 id2 id3 id4 id5 id6 id7 id8
1
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*DATABASE_GLSTAT
$ dt
5.000E-07
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*DATABASE_NODOUT
$ dt
5.000E-07
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*DATABASE_HISTORY_NODE
$ id1 id2 id3 id4 id5 id6 id7 id8
1 116 284 361 326
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$$$$ Constraints
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
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$$$$ Constrain shell nodes on the inner radius of the dome shells
$$$$ to the outer radius of the dome solids
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*CONSTRAINED_SHELL_TO_SOLID
$ nid nsid
326 1
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*SET_NODE_LIST
$ sid da1 da2 da3 da4
1
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
116 158 200 242 284
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*CONSTRAINED_SHELL_TO_SOLID
$ nid nsid
327 2
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*SET_NODE_LIST
$ sid da1 da2 da3 da4
2
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
117 159 201 243 285
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*CONSTRAINED_SHELL_TO_SOLID
$ nid nsid
328 3
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*SET_NODE_LIST
$ sid da1 da2 da3 da4
3
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
118 160 202 244 286
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*CONSTRAINED_SHELL_TO_SOLID
$ nid nsid
329 4
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*SET_NODE_LIST
$ sid da1 da2 da3 da4
4
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
119 161 203 245 287
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*CONSTRAINED_SHELL_TO_SOLID
$ nid nsid
330 5
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*SET_NODE_LIST
$ sid da1 da2 da3 da4
5
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
120 162 204 246 288
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*CONSTRAINED_SHELL_TO_SOLID
$ nid nsid
331 6
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*SET_NODE_LIST
$ sid da1 da2 da3 da4
6
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
121 163 205 247 289
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*CONSTRAINED_SHELL_TO_SOLID
$ nid nsid
332 7
*SET_NODE_LIST
$ sid da1 da2 da3 da4
7
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
122 164 206 248 290
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$$$$ Define Loads
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$$$$ Load 4 segments with pressure at 5,308 psi for 2.0E-04 seconds
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$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
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*LOAD_SEGMENT
$ lcid sf at n1 n2 n3 n4
1 1.000E+00 0.000E+00 1 2 4 3
1 1.000E+00 0.000E+00 2 5 7 4
1 1.000E+00 0.000E+00 3 4 8 6
1 1.000E+00 0.000E+00 4 7 9 8
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*DEFINE_CURVE
$ lcid sidr scla sclo offa offo
1
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$ a o
0.000E+00 5.308E+04
2.000E-04 5.308E+04
2.010E-04 0.000E+00
1.000E+00 0.000E+00
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$$$$ Define Parts and Materials
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$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
*PART
$ pid sid mid eosid hgid adpopt
Brick
1 1 1 0 0 0
Brick2
2 1 1 0 0 0
Shell
3 2 1 0 0 0
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$$$$$$ Materials
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*MAT_ELASTIC
$ mid ro e pr da db
1 2.00e-4 29.00e+6 0.330
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$$$$$$ Sections
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*SECTION_SOLID
$ sid elform
1 0
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*SECTION_SHELL
$ sid elform shrf nip propt qr/irid icomp
2
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$ t1 t2 t3 t4 nloc
1.576E-02 1.576E-02 1.576E-02 1.576E-02
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$$$$ Define Nodes and Elements
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*END
