Crashbox
A symmetric short crush tube is impacted by a moving wall. Corner elements are removed on desired initial crush area. See file symtube.k for exploitation of symmetry. Download is available in the download section of this document.
Keywords
Keywords
This example has been taken from the introductory class of John D. Reid. Example name: tube.k
The used Keywords in alphabetical order.
*BOUNDARY_SPC_NODE *CONTACT_AUTOMATIC_SINGLE_SURFACE *CONTROL_ENERGY *CONTROL_TERMINATION *DATABASE_BINARY_D3PLOT *DATABASE_BINARY_D3THDT *DATABASE_EXTENT_BINARY *DATABASE_GLSTAT *DATABASE_HISTORY_NODE *DATABASE_MATSUM *DATABASE_NODOUT *DATABASE_RWFORC *DATABASE_SLEOUT *ELEMENT_SHELL *END *KEYWORD *MAT_PIECEWISE_LINEAR_PLASTICITY *NODE *PART *RIGIDWALL_PLANAR_MOVING_FORCES *SECTION_SHELL *TITLE
Reduced Input
Reduced Input
This example has been taken from the introductory class of John D. Reid. Example name: tube.k
*Node and *Element Cards are removed.
*KEYWORD
*TITLE
Short Crush Tube Impacted by a Moving Wall
$
$ J.D. Reid 2/14/95, 1/17/96, 2/15/00
$
$ Units: mm, kg, ms, kN, GPa, kN-mm
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
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$$$$ Control Ouput
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*CONTROL_TERMINATION
$ endtim endcyc dtmin endeng endmas
20.00
$
*CONTROL_ENERGY
$ hgen rwen slnten rylen
2 2
$
*DATABASE_BINARY_D3PLOT
$ dt lcdt
1.0
$
*DATABASE_EXTENT_BINARY
$ neiph neips maxint strflg sigflg epsflg rltflg engflg
$ cmpflg ieverp beamip
1
$
*DATABASE_BINARY_D3THDT
$ dt lcdt
999999
$
$
*DATABASE_GLSTAT
$ dt
0.1
$
*DATABASE_MATSUM
$ dt
0.1
$
*DATABASE_NODOUT
$ dt
0.1
$
*DATABASE_HISTORY_NODE
$ id1 id2 id3
99999 259 7
$
*DATABASE_RWFORC
$ dt
0.1
$
*DATABASE_SLEOUT
$ dt
0.1
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Contacts - Sliding Interfaces
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*CONTACT_AUTOMATIC_SINGLE_SURFACE
$ ssid msid sstyp mstyp sboxid mboxid spr mpr
0
$ Equating ssid to zero means that all segments are included in the contact
$
$ fs fd dc vc vdc penchk bt dt
0.08 0.08
$
$ sfs sfm sst mst sfst sfmt fsf vsf
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Stone Walls
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*RIGIDWALL_PLANAR_MOVING_FORCES
$ nsid nsidex boxid
0 0 0
$
$ xt yt zt xh yh zh fric
0.0 0.0 274.0 0.0 0.0 0.0 1.0
$
$ sw mass sw vel
800.000 8.94
$
$ soft ssid node1 node2 node3 node4
0 0 99999
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Materials and Parts
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*PART
$ pid sid mid eosid hgid grav adpopt tmid
corner 1
1 1 1
corner 2
2 1 1
corner 3
3 1 1
corner 4
4 1 1
$
$
*MAT_PIECEWISE_LINEAR_PLASTICITY
$ mid ro e pr sigy etan eppf tdel
1 7.830E-06 200.0 0.3 0.366 0.750
$
$ C p lcss lcsr
40 5
$
$ Values for plastic stress/strain curves
0.000 0.025 0.049 0.072 0.095 0.118 0.140 0.182
0.366 0.424 0.476 0.507 0.529 0.546 0.559 0.584
$
$
*SECTION_SHELL
$ sid elform shrf nip propt qr/irid icomp
1 2 3.0000
$ t1 t2 t3 t4 nloc
2.0 2.0 2.0 2.0
$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Constraints, Boundary & Initial Conditions
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$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
$$$$ Nodal single point constraints
$
*BOUNDARY_SPC_NODE
$ nid cid x y z rx ry rz
$
*END
Figures
Figures
This example has been taken from the introductory class of John D. Reid. Example name: tube.k
Animated Result
Animated Result
This example has been taken from the introductory class of John D. Reid. Example name: tube.k
Download
Download
This example has been taken from the introductory class of John D. Reid. Example name: tube.k
