Sphere Sphere Contact
Sphere-sphere contact force model
The Sphere Sphere Contact model connects Sphere and Sphere contact elements.
Contact forces are generated only when the contacts are enabled.
The active parameter selects how the contacts are enabled. It has the following settings:
Always Active, the default, means the contacts are always enabled.
Boolean Signal means the contacts are enabled when the enable contact boolean input is true.
Start/Stop Time means the contacts are enabled at specified start time, Ton, and disabled at a specified stop time, Toff.
The on/off parameter is used with the Start/Stop Time selection and has the following settings:
Start Time means the contacts are enabled at Ton.
Stop Time means the contacts are disabled at Toff.
Start/Stop Time means the contacts are enabled at Ton and disabled at Toff.
The use record boolean parameter, if enabled, specifies the name of an external record parameter that defines the parameters of the contact.
The mode parameter selects one of three modes: Linear spring and damper, Linear spring and limited damper, and Hunt and Crossley. The first two use the c and d parameters to set the spring and damping constants. The Hunt and Crossley model uses the parameters cn, dn, n, p, and q. See the Multibody Contact Modes help page for the resulting force equations.
The μ parameter is the coefficient of friction between contacting bodies.
The kμ parameter is a smoothness coefficient for sliding friction, it scales μ by tanh⁡kμ⁢vt, where vt is the tangential velocity.
The ε parameter specifies a minimum length used when normalizing vectors.
Optional boolean input; enable contact
Connection to spheres
Selects contact activation
Selects start/stop times
Use contact properties record
Linear spring and damper
Contact force formulation
Spring constant (c>0)
Nonlinear spring constant (cn>0)
Nonlinear damping constant
Nonlinear elastic force exponent
Nonlinear damping force exponent
Coefficient of friction
Smoothness coefficient for sliding friction
Minimum length of vectors for normalization
Name of contact property record component
Number of spheres at port 1
use sphere to sphere contact at port 1
True (checked) means model contacts between the spheres at port 1
Number of spheres at port 2
use sphere to sphere contact at port 2
True (checked) means model contacts between the spheres at port 2
True (checked) means contact is inside sphere
Download Help Document
What kind of issue would you like to report? (Optional)