Contact Friction I
This should model a drum rotating with initial angular velocity which should be brought to rest by a rubber pad pressed against it. This example does not work and you can learn from it, how to debug a LS-DYNA deck. See next example for solution.
https://www.dynaexamples.com/introduction/intro-by-a.-tabiei/contact/contact-friction-i
https://www.dynaexamples.com/@@site-logo/LS-DYNA-Examples-Logo480x80.png
Contact Friction I
This should model a drum rotating with initial angular velocity which should be brought to rest by a rubber pad pressed against it. This example does not work and you can learn from it, how to debug a LS-DYNA deck. See next example for solution.
*BOUNDARY_SPC_SET *CONSTRAINED_EXTRA_NODES_NODE *CONSTRAINED_NODE_SET *CONTACT_NODES_TO_SURFACE *CONTROL_ENERGY *CONTROL_TERMINATION *CONTROL_TIMESTEP *DATABASE_BINARY_DPLOT *DATABASE_GLSTAT *DATABASE_HISTORY_NODE_SET *DATABASE_MATSUM *DATABASE_NODOUT *DATABASE_RCFORC *DEFINE_CURVE *ELEMENT_SHELL *ELEMENT_SOLID *END *INITIAL_VELOCITY_GENERATION *KEYWORD *LOAD_NODE_SET *MAT_MOONEY-RIVLIN_RUBBER *MAT_RIGID *NODE *PART *SECTION_SHELL *SECTION_SOLID *SET_NODE_LIST *TITLE
*KEyWORD
*TItLE
BRAKING PROBLEM (N2S, RUBBER PAD)
$ learn how to debug an LS-DYNA deck
$ units: m, s, Kg, N
$ A. Tabiei 3/30/98
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*CONTROL_TIMESTEP
0.0000 0.9000
*CONTROL_TERMINATION
0.2500
CONTROL_CONTACT
$ SLSFAC RWPNAL ISLCHK SHLTHK PENOPT THKCHG ORIEN
2 2
$ USRSTR USRFAC NSBCS INTERM XPENE
*CONTROL_ENERGY
$ hgen rwen slnten rylen
2 2
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*DATABASE_BINARY_DPLOT
0.01
*DATABASE_MATSUM
0.100E-04
*DATABASE_NODOUT
0.100E-04
*DATABASE_RCFORC
0.100E-02
*DATABASE_GLSTAT
0.100E-04
*DATABASE_HISTORY_NODE_SET
10
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*MAT_RIGID
$ MID RO E PR
1 7.890E+30 2.100E+11 3.000E-01
$ CMO CON CON2
1.000E+00 7.000E+00 5.000E+00
$ alternative method for specifying local system below (optional)
*MAT_MOONEY-RIVLIN_RUBBER
$ MID RO PR A B
2 5.000E+03 4.900E-01 5.520E+05 1.380E+05
$ if A=B=0, then a least square fit is computed from test based on data below
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*SECTION_SHELL
1 2 0.000E+00 3.000E+00 0.000E+00 0.000E+00
5.000E-03 5.000E-03 5.000E-03 5.000E-03 0.000E+00
*SECTION_SOLID
2 1
*PART
DRUM:
10 1 1
*PART
BRAKE-PAD:
2 2 2
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*CONSTRAINED_NODE_SET
$ NSID DOF
11 1
*CONSTRAINED_EXTRA_NODES_NODE
$ PID NID/NSID
1 259
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*INITIAL_VELOCITY_GENERATION
$ ID STYP OMEGA
1 2 3.000E+02
$ XC YC ZC NX NY NZ PHASE
0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.000E+00 0.000E+00 0
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*SET_NODE_LIST
10
259
*SET_NODE_LIST
11
215 216 219 220 223 224 227 228
231 232 235 236 239 240 243 244
247 248 251 252 255 256
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*LOAD_NODE_SET
$ NID/NSID DOF LCID SF CID
11 1 1 -1.59E+02 0
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*BOUNDARY_SPC_SET
$ NID/NSID CID DOFX DOFY DOFZ DOFRX DOFRY DOFRZ
11 0 0 1 1 0 0 0
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*DEFINE_CURVE
1
0.00000000000000E+00 1.0000000000000E+00
1.00000000000000E+04 1.0000000000000E+00
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*CONTACT_nodes_TO_surface
2 1 2 3 0 0
0.1500000 0.1500000 0.0000000 0.0000000 0.0000000 0 0.0000000 1.000E+20
1.0000000 1.0000000 0.0000000 0.0000000 1.0000000 1.0000000 1.0000000 1.0000000
$---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
*NODE
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5 -1.74311485E-02 -7.50000000E-02 -1.99238940E-01
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79 5.176380902E-02 7.500000000E-02 -1.93185165E-01
80 6.840402867E-02 7.500000000E-02 -1.87938524E-01
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83 1.147152873E-01 7.500000000E-02 -1.63830409E-01
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96 1.969615506E-01 7.500000000E-02 3.472963553E-02
97 1.931851653E-01 7.500000000E-02 5.176380902E-02
98 1.879385242E-01 7.500000000E-02 6.840402867E-02
99 1.812615574E-01 7.500000000E-02 8.452365235E-02
100 1.732050808E-01 7.500000000E-02 1.000000000E-01
101 1.638304089E-01 7.500000000E-02 1.147152873E-01
102 1.532088886E-01 7.500000000E-02 1.285575219E-01
103 1.414213562E-01 7.500000000E-02 1.414213562E-01
104 1.285575219E-01 7.500000000E-02 1.532088886E-01
105 1.147152873E-01 7.500000000E-02 1.638304089E-01
106 1.000000000E-01 7.500000000E-02 1.732050808E-01
107 8.452365235E-02 7.500000000E-02 1.812615574E-01
108 6.840402867E-02 7.500000000E-02 1.879385242E-01
109 5.176380902E-02 7.500000000E-02 1.931851653E-01
110 3.472963553E-02 7.500000000E-02 1.969615506E-01
111 1.743114855E-02 7.500000000E-02 1.992389396E-01
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119 1.285575219E-01 -7.50000000E-02 1.532088886E-01
120 1.414213562E-01 -7.50000000E-02 1.414213562E-01
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252 2.525000000E-01 5.000000000E-02 4.000000000E-02
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256 2.525000000E-01 5.000000000E-02 5.000000000E-02
257 2.025000000E-01 -5.00000000E-02 5.000000000E-02
258 2.025000000E-01 5.000000000E-02 5.000000000E-02
259 0.000000000E+00 0.000000000E+00 0.000000000E+00
*ELEMENT_SHELL
1 1 4 5 76 3
2 1 5 6 75 76
3 1 6 7 74 75
4 1 7 8 73 74
5 1 8 9 72 73
6 1 9 10 71 72
7 1 10 11 70 71
8 1 11 12 69 70
9 1 12 13 68 69
10 1 13 14 67 68
11 1 14 15 66 67
12 1 15 16 65 66
13 1 16 17 64 65
14 1 17 18 63 64
15 1 18 19 62 63
16 1 19 20 61 62
17 1 20 21 60 61
18 1 21 22 59 60
19 1 22 23 58 59
20 1 23 24 57 58
21 1 24 25 56 57
22 1 25 26 55 56
23 1 26 27 54 55
24 1 27 28 53 54
25 1 28 29 52 53
26 1 29 30 51 52
27 1 30 31 50 51
28 1 31 32 49 50
29 1 32 33 48 49
30 1 33 34 47 48
31 1 34 35 46 47
32 1 35 36 45 46
33 1 36 37 44 45
34 1 37 38 43 44
35 1 38 39 42 43
36 1 39 40 41 42
37 1 3 77 146 4
38 1 77 78 145 146
39 1 78 79 144 145
40 1 79 80 143 144
41 1 80 81 142 143
42 1 81 82 141 142
43 1 82 83 140 141
44 1 83 84 139 140
45 1 84 85 138 139
46 1 85 86 137 138
47 1 86 87 136 137
48 1 87 88 135 136
49 1 88 89 134 135
50 1 89 90 133 134
51 1 90 91 132 133
52 1 91 92 131 132
53 1 92 93 130 131
54 1 93 94 129 130
55 1 94 95 128 129
56 1 95 96 127 128
57 1 96 97 126 127
58 1 97 98 125 126
59 1 98 99 124 125
60 1 99 100 123 124
61 1 100 101 122 123
62 1 101 102 121 122
63 1 102 103 120 121
64 1 103 104 119 120
65 1 104 105 118 119
66 1 105 106 117 118
67 1 106 107 116 117
68 1 107 108 115 116
69 1 108 109 114 115
70 1 109 110 113 114
71 1 110 111 112 113
72 1 111 41 40 112
*ELEMENT_SOLID
73 2 215 216 218 217 219 220 222 221
74 2 219 220 222 221 223 224 226 225
75 2 223 224 226 225 227 228 230 229
76 2 227 228 230 229 231 232 234 233
77 2 231 232 234 233 235 236 238 237
78 2 235 236 238 237 239 240 242 241
79 2 239 240 242 241 243 244 246 245
80 2 243 244 246 245 247 248 250 249
81 2 247 248 250 249 251 252 254 253
82 2 251 252 254 253 255 256 258 257
*END