Modification of a contact problem

Index Modification of a contact problem Ver: 0

DESCRIPTION

This menu allows for setting the parameters of a contact problem : contact domain, contact wall, penalty and slipping coefficient, penetration accuracy and volume generation (for shells). OPTIONS

-1 Upper level menu

1 Modify contact domain

Allows to choose the subdomain(s) that represent the mold, i.e. the subdomain(s) with which contact must be detected.

2 Modify contact wall

Allows to choose the boundary of the mold (the contact domain), with which contact must be detected.

3 Define translation velocity

Allows to define the translation motion of the mold

# Define angular velocity

Allows to define the angular velocity around Z axis (axisymmetric only)

5 Modify alpha

Allows to set the alpha coefficient of the heat conduction equation q = alpha * ( T - Talpha) where q is the heat flux when contact is detected. Talpha is the temperature of the mold.

6 Modify Talpha

Allows to set Talpha the temperature of the mold

7 Modify slipping coefficient

Allows to set the Fslip coefficient. The tangential force is fs = - Fslip (v - vwall). The default value of fslip is 1E+09 that corresponds to a zero relative velocity.

8 Modify penalty coefficient

Allows to set the k coefficient. When contact is detected, a normal force is generated fn = - k (v - vwall) . n
The default value of k is 1E+09 that is appropriate for most cases.

9 Modify penetration accuracy

Allows to set the penetration accuracy. If the penetration of a point is greater that the prescribed penetration accuracy, the time step will be rejected and the calculation will be restarted from the previous time step.

10 Modify element dilatation

Allows to set the expansion of each finite element of the mold in order to help the contact detection algorithm. The default value is set according to the mesh dimensions and generally does not require modification.

# Modify amplitude of volume generation

2D molds need to be extended to a volume to allow for contact detection. 2D molds are extended to 3D in the local normal direction, by a constant amount that is precisely equal to the specified amplitude. This value must be entered in the unit length used for the mesh. (shell only)

# Specify mold side / cavity side

When selected, updates the graphic window to include an arrow. User must specify whether the volume generation occurs in the direction of the arrow or in the opposite direction. (shell only)

SEE ALSO

Blow Molding and Thermoforming (UM)
contact domain
contact wall
shell domain

-1	Upper level menu
1	Modify contact domain
	Allows to choose the subdomain(s) that represent the mold, i.e. the subdomain(s) with which contact must be detected.
2	Modify contact wall
	Allows to choose the boundary of the mold (the contact domain), with which contact must be detected.
3	Define translation velocity
	Allows to define the translation motion of the mold
#	Define angular velocity
	Allows to define the angular velocity around Z axis (axisymmetric only)
5	Modify alpha
	Allows to set the alpha coefficient of the heat conduction equation q = alpha ( T - Talpha) where q is the heat flux when contact is detected. Talpha is the temperature of the mold.*
6	Modify Talpha
	Allows to set Talpha the temperature of the mold
7	Modify slipping coefficient
	Allows to set the Fslip coefficient. The tangential force is fs = - Fslip (v - vwall). The default value of fslip is 1E+09 that corresponds to a zero relative velocity.
8	Modify penalty coefficient
	Allows to set the k coefficient. When contact is detected, a normal force is generated fn = - k (v - vwall) . n The default value of k is 1E+09 that is appropriate for most cases.
9	Modify penetration accuracy
	Allows to set the penetration accuracy. If the penetration of a point is greater that the prescribed penetration accuracy, the time step will be rejected and the calculation will be restarted from the previous time step.
10	Modify element dilatation
	Allows to set the expansion of each finite element of the mold in order to help the contact detection algorithm. The default value is set according to the mesh dimensions and generally does not require modification.
#	Modify amplitude of volume generation
	2D molds need to be extended to a volume to allow for contact detection. 2D molds are extended to 3D in the local normal direction, by a constant amount that is precisely equal to the specified amplitude. This value must be entered in the unit length used for the mesh. (shell only)
#	Specify mold side / cavity side
	When selected, updates the graphic window to include an arrow. User must specify whether the volume generation occurs in the direction of the arrow or in the opposite direction. (shell only)