MotionView User's Guide

Contacts Panel - Properties Tab - Point to Deformable Surface Contact

Contacts Panel - Properties Tab - Point to Deformable Surface Contact

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Contacts Panel - Properties Tab - Point to Deformable Surface Contact

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From the Point to Deformable Surface Contact -Properties tab on the Contacts panel, you can define the contact method and the properties for the option type selected.

Select:

To:

LINEAR

Select this type of contact algorithm to model the contact force using stiffness and damping values.

POISSON

Select this type of contact algorithm to model the contact force using the penalty method.

User Defined

Select this type of contact algorithm to model the contact force using the user defined method.

Flip normal

For a 3-D object, the normals point outward which represents a typical outer surface of a volume.  Flip normal can be used to turn that surface into a void, or "hole". 

LINEAR

contact_properties_tab_point_to_deformable

Contacts panel - Properties tab - Point to Deformable Surface Contact (with the LINEAR option selected)

Use:

To:

Radius

Enter the radius of the sphere that the deformable surface will be contacting.

Stiffness

Enter the stiffness of the contact force that applies to the Linear contact method.

Damping

Enter the damping of the contact force that applies to the Linear contact method.

POISSON

contact_properties_tab_point_to_deformable_poisson

Contacts panel - Properties tab - Point to Deformable Surface Contact (with the POISSON option selected)

Use:

To:

Radius

Enter the radius of the sphere that the deformable surface will be contacting.

Penalty

Enter the penalty value to model the contact force with the Poisson method.

Restitution
coefficient

Enter the value representing the energy loss for the Poisson method.

User Defined

contact_properties_tab_user_defined

Contacts panel - Properties tab - Point to Deformable Surface Contact (with the User Defined option selected)

Use:

To:

Radius

Enter the radius of the sphere that the deformable surface will be contacting.

User expr

Provide an expression with the USER solver function with parameters being passed to the user subroutine.

Use local file and function name

Activate the check box to specify a local file where the subroutine code can be accessed by the solver.  The type of file to be specified will depend on the selected Function Type.  For example if DLL/SO is selected, you can specify a file with a .dll extension (for Windows) or an .so extension (for Linux).

Function Type

Valid options for MotionSolve:

•DLL/SO
•Python
•Matlab

Function Name

Specify the function name in the sub-routine that is used to calculate the contact force.  MotionView provides PTDSFSUB as the default, which is the default function used by MotionSolve.