Contact I
A shell element drops and rebounds on an elastic plate.
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Contact I
A shell element drops and rebounds on an elastic plate.
*CONTACT Shell Rebounds from Plate Using Five Contact Types LS-DYNA Manual Section: *CONTACT Additional Sections: *INITIAL_VELOCITY Example: Shell Rebounds from Plate Using Five Contact Types Filename: contact.plates.k Description: A shell element drops and rebounds on an elastic plate. Model: The plate measures 40*40*1 mm3 and contains 16 shell elements. The dropped shell element has a side length of 10 mm, a thickness of 2 mm and drop height of 10 mm. All shell elements are elastic with Belytschko-Tsay formulation. The dropped shell element has an initial velocity of 100,000 mm/second vertically towards the plate. The calculations terminate at 0.0002 seconds. Input: All four nodes of the dropped shell element have an initial velocity specified by *INITIAL_VELOCITY. Contact types 3, 5 and 10 use the dropped shell element as slave side and the four shell elements in the center of the plate as master side. The example file has type 3 contact activated, while the other contact types are commented out. To change contact types, simply comment out type 3 and un-comment the desired contact. Type 3 contact is a two way surface to surface algorithm. The segments on the slave side are checked for penetration of the master segment then the opposite search takes place. Type 4 is a single surface algorithm. The nodes of all segments are checked for penetration of all segments. Type 5 is a node to surface one way algorithm. The program checks that no slave node penetrates any master segment. Type 10 converts surface to surface definition into a node to surface definition. Type 13 is a more robust version of the single surface algorithm. Reference: Schweizerhof, K. and Weimar, K.
$$*CONTACT_AUTOMATIC_SINGLE_SURFACE $$*CONTACT_NODES_TO_SURFACE $$*CONTACT_ONE_WAY_SURFACE_TO_SURFACE $$*CONTACT_SINGLE_SURFACE $$*SET_NODE_LIST $$*SET_SEGMENT *CONTACT_SURFACE_TO_SURFACE *CONTROL_ENERGY *CONTROL_HOURGLASS *CONTROL_TERMINATION *CONTROL_TIMESTEP *DATABASE_BINARY_D3PLOT *DATABASE_BINARY_D3THDT *DATABASE_EXTENT_BINARY *DATABASE_GLSTAT *DATABASE_HISTORY_NODE *DATABASE_MATSUM *DATABASE_NCFORC *DATABASE_NODOUT *DATABASE_RCFORC *ELEMENT_SHELL *END *INITIAL_VELOCITY *KEYWORD *MAT_ELASTIC *NODE *PART *SECTION_SHELL *SET_NODE_LIST *SET_SEGMENT *TITLE
*KEYWORD
*TITLE
Sliding Interface Types 3,4,5,10,13
$
$ LSTC Example
$
$ Last Modified: September 5, 1997
$
$ Five different contacts are defined for the same problem. The only one
$ active is type 3, surface to surface. The other four are commented out.
$ To switch contact types, comment out the active one and remove the comments
$ from the desired one.
$
$ Units: mm, s
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Control Ouput
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
*CONTROL_TERMINATION
$ endtim endcyc dtmin endneg endmas
.200E-3
$
*CONTROL_ENERGY
$ hgen rwen slnten rylen
2 1 2
$
*CONTROL_HOURGLASS
$ ihq qh
4
$
*CONTROL_TIMESTEP
$ dtinit scft isdo tslimt dtms lctm erode ms1st
0.50 0
$
*DATABASE_BINARY_D3PLOT
$ dt lcdt
0.0100E-3
$
*DATABASE_BINARY_D3THDT
$ dt lcdt
2.0000E-3
$
*DATABASE_EXTENT_BINARY
$ neiph neips maxint strflg sigflg epsflg rltflg engflg
1
$ cmpflg ieverp beamip
$
*DATABASE_GLSTAT
$ dt
0.01e-04
$
*DATABASE_NCFORC
$ dt
0.01e-04
$
*DATABASE_NODOUT
$ dt
0.01e-04
$
*DATABASE_HISTORY_NODE
$ id1 id2 id3 id4 id5 id6 id7 id8
12 13 101
$
*DATABASE_MATSUM
$ dt
0.10e-05
$
*DATABASE_RCFORC
$ dt
0.01e-04
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Contacts
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
$$$$$$$$$$ Type 3, surface to surface
$
*CONTACT_SURFACE_TO_SURFACE
$ ssid msid sstyp mstyp sboxid mboxid spr mpr
1 2 1 1
$ fs fd dc vc vdc penchk bt dt
$ sfs sfm sst mst sfst sfmt fsf vsf
$
*SET_SEGMENT
$ sid
1
$ n1 n2 n3 n4
101 103 104 102
$
*SET_SEGMENT
$ sid
2
$ n1 n2 n3 n4
7 8 13 12
8 9 14 13
12 13 18 17
13 14 19 18
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
$$$$$$$$$$ Type 4, single surface
$ to make active, remove the $$ from the lines below
$
$$*CONTACT_SINGLE_SURFACE
$ ssid msid sstyp mstyp sboxid mboxid spr mpr
$$ 1 0 1 1
$ fs fd dc vc vdc penchk bt dt
$$
$ sfs sfm sst mst sfst sfmt fsf vsf
$$
$
$$*SET_SEGMENT
$ sid
$$ 1
$ n1 n2 n3 n4
$$ 101 103 104 102
$$ 7 8 13 12
$$ 8 9 14 13
$$ 12 13 18 17
$$ 13 14 19 18
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
$$$$$$$$$$ Type 5, node to surface
$ to make active, remove the $$ from the lines below
$
$$*CONTACT_NODES_TO_SURFACE
$ ssid msid sstyp mstyp sboxid mboxid spr mpr
$$ 1 2 4 1 1
$ fs fd dc vc vdc penchk bt dt
$$
$ sfs sfm sst mst sfst sfmt fsf vsf
$$
$
$$*SET_NODE_LIST
$ sid
$$ 1
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
$$ 101 103 104 102
$
$$*SET_SEGMENT
$ sid
$$ 2
$ n1 n2 n3 n4
$$ 7 8 13 12
$$ 8 9 14 13
$$ 12 13 18 17
$$ 13 14 19 18
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
$$$$$$$$$$ Type 10, surface to surface
$ to make active, remove the $$ from the lines below
$
$$*CONTACT_ONE_WAY_SURFACE_TO_SURFACE
$ ssid msid sstyp mstyp sboxid mboxid spr mpr
$$ 1 2 1 1
$ fs fd dc vc vdc penchk bt dt
$$
$ sfs sfm sst mst sfst sfmt fsf vsf
$$
$
$$*SET_SEGMENT
$ sid
$$ 1
$ n1 n2 n3 n4
$$ 101 103 104 102
$
$$*SET_SEGMENT
$ sid da1 da2 da3 da4
$$ 2
$ n1 n2 n3 n4
$$ 7 8 13 12
$$ 8 9 14 13
$$ 12 13 18 17
$$ 13 14 19 18
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
$$$$$$$$$$ Type 13, automatic single surface
$ to make active, remove the $$ from the lines below
$
$$*CONTACT_AUTOMATIC_SINGLE_SURFACE
$ ssid msid sstyp mstyp sboxid mboxid spr mpr
$$ 0 0 1 1
$ fs fd dc vc vdc penchk bt dt
$$
$ sfs sfm sst mst sfst sfmt fsf vsf
$$
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Initial Conditions
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Nodes of the Impactor Material are given an initial velocity.
$
*INITIAL_VELOCITY
$ nsid nsidex boxid
1
$ vx vy vz
0.0 0.0 -100000.0
$
*SET_NODE_LIST
$ sid
1
$ nid1 nid2 nid3 nid4 nid5 nid6 nid7 nid8
101 102 103 104
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Parts and Materials
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
$
*PART
$ pid sid mid eosid hgid adpopt
Impacted Material
1 1 1
Impactor Material
2 2 1
$
$
*MAT_ELASTIC
$ mid ro e pr da db k
1 1.00e-8 100000.0 0.300
$
$
*SECTION_SHELL
$ sid elform shrf nip propt qr/irid icomp
1 0.83333 2.0 3.0
$ t1 t2 t3 t4 nloc
1.0 1.0 1.0 1.0
$
*SECTION_SHELL
$ sid elform shrf nip propt qr/irid icomp
2 0.83333 2.0 3.0
$ t1 t2 t3 t4 nloc
2.0 2.0 2.0 2.0
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$$ Define Nodes and Elements
$
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$
$$$ Outer edge nodes of the Impacted Material are fixed in translation (tc = 7)
$
*END