Contact Friction II
This models a drum rotating with initial angular velocity. The drum is brought to rest by a rubber pad pressed against it. From this example you can learn about friction, rubber, rigid material and angular velocity. Download is available in the download section of this document.
Keywords
Keywords
This example has been taken from the introductory class of Prof. Dr. Ala Tabiei. Example name: brake.k
The used Keywords in alphabetical order.
*BOUNDARY_SPC_SET *CONSTRAINED_EXTRA_NODES_NODE *CONSTRAINED_NODE_SET *CONTACT_NODES_TO_SURFACE *CONTROL_CONTACT *CONTROL_ENERGY *CONTROL_TERMINATION *CONTROL_TIMESTEP *DATABASE_BINARY_D3PLOT *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
Reduced Input
Reduced Input
This example has been taken from the introductory class of Prof. Dr. Ala Tabiei. Example name: brake.k
*Node and *Element Cards are removed.
*KEYWORD
*TITLE
BRAKING PROBLEM (N2S, RUBBER PAD)
$ learn friction, rubber and rigid material, and angular velocity
$ drum with radius of 200 mm width of 150 mm and thickness of 5 mm
$ is rotating with initial angulay velocity. The drum is to be brought to
$ rest by rubber brake pad 50x100x100 mm. The normal force pressing the pad
$ against the drum is 3498 N. The friction coeffecient is 0.15.
$ units: m, s, Kg, N
$ A. Tabiei 3/3/98
$---+----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_D3PLOT
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+03 2.100E+11 3.000E-01
$ CMO CON CON2
1.000E+00 7.000E+00 6.000E+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:
1 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
*CONTACT_nodes_TO_surface
2 1 3 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
*DEFINE_CURVE
1
0.00000000000000E+00 1.0000000000000E+00
1.00000000000000E+04 1.0000000000000E+00
*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
*NODE
$
*ELEMENT_SHELL
$
*ELEMENT_SOLID
$
*END
Figures
Figures
This example has been taken from the introductory class of Prof. Dr. Ala Tabiei. Example name: brake.k
Animated Result
Animated Result
This example has been taken from the introductory class of Prof. Dr. Ala Tabiei. Example name: brake.k
Download
Download
This example has been taken from the introductory class of Prof. Dr. Ala Tabiei. Example name: brake.k
