
Contacttype constraints can be
created between two directed surfaces. Directed means that an internal side
and an external side can be defined from a geometrical element, a face of a
pad for example. This definition excludes surface element and wireframe
surface because they are not directed. 

The common area between the two
elements can be a plane (plane contact), a line (line contact), a point
(point contact) or a circle (annular contact). 

The following table shows the
elements you can select for a contact constraint. 


Plane 
Cylinder 
Sphere 
Cone 
Circle 
Plane 



NA 
NA 
Cylinder 

(1) 
NA 
NA 
NA 
Sphere 

NA 
(2) 
(4) 
(4) 
Cone 
NA 
NA 

(3) 
(4) 
Circle 
NA 
NA 
(4) 
(4) 
NA 


 NA: Not Applicable.
 Plane: a plane or a planar surface for example.

:
surface contact.

:
line or annular contact.

:
point contact.
 (1) A cylindercylinder surface contact is possible when their radius
are equal only.
The contact constraint resulting is equivalent to a coincidence
constraint, cylinders look like merged.
 (2) A spheresphere surface contact is possible when their radius are
equal only.
The contact constraint resulting is equivalent to a coincidence
constraint, spheres look like merged.
 (3 A conecone surface contact is possible when their angles are
equal only.
The contact constraint resulting is equivalent to a coincidence
constraint, cones look like merged.
 (4) annular contact.


Important: The contact constraint is resolved using the
mathematical and unlimited definition of the selected geometries and not
the selected geometries themselves. Due to this definition, the contact
constraint is not necessarily positioned according to the selected
geometries, and can be
positioned outside of their contact area in 3D. 