JKR Model Properties
The properties of the Johnson-Kendall-Roberts (JKR) Contact Model model are shown below for reference. See the properties table in the JKR Model “Properties” section for full details for each property.
Note
Read-only properties are indicated by (r) at right in this listing.
- jkr
- a0 f (r)
a0 - Equilibrium contact patch radius.
- adh_exp f
Ma - active mode with default value 0.
- dp_force v (r)
Fd - dashpot force. Expressed in the contact plane coordinate system.
- dp_mode i
Md - dashpot mode with default value 0.
- dp_nratio f
βn- normal critical damping ratio with default value 0.0.
- dp_sratio f
βs - shear critical damping ratio with default value 0.0.
- fric f
μ - sliding friction coefficient with default value 0.0.
- jkr_force v
FJKR - JKR force with default value 0. Expressed in the contact plane coordinate system.
- jkr_poiss f
ν - poisson’s ratio with default value 0.0.
- jkr_shear f
G - shear modulus in units of stress with default value 0.0.
- jkr_slip b (r)
s - sliding slip state.
- pull_off_f f (r)
Fpo - pull-off force.
- ks_fac f
ksf - shear stiffness scaling factor with default value 1.0.
- tear_off_d f (r)
δpo - tear-off distance.
- rr_fric f
μr - rolling friction coefficient with default value 0.0.
- rr_moment v
Mr - Rolling resistance moment with default value 0. Expressed in the contact plane coordinate system.
- rr_slip b (r)
sr - rolling slip state.
- surf_adh f
γ - surface adhesion energy with default value 0.0.
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