*PointToDeformableSurfaceContact()

Creates a contact force between a sphere of radius (r) and a deformable surface.

Syntax

*PointToDeformableSurfaceContact(ptdsfcon_name,"ptdsfcon_label", body, point, POISSON|LINEAR, def_srf, flip_normal)

Arguments

ptdsfcon_name: The variable name of the point to deformable surface contact.; Data type: varname
ptdsfcon_label: The label of the point to deformable surface contact.; Data type: label
body: The body that the sphere will be attached to.; Data type: Body
point: The center of the sphere.; Data type: Point
POISSON|LINEAR: The contact algorithm to be used.
def_srf: The deformable surface which will come into contact with the sphere.; Data type: Deformable Surface
flip_normal: Set to TRUE if the solver should reverse the normals of the deformable surface. This will use the right hand rule for the generation of the normals.; Data type: boolean

Example

*BeginMDL(the_model, "The Model")
 *Point(p_1, "Point 1")
 *Point(p_2, "Point 2")
 *Point(p_3, "Point 3")
 *Point(p_4, "Point 4")
 *Point(p_5, "Point 5")
 *Point(p_6, "Point 6")
 *DeformableSurface(defsrf_0, "DeformableSurface 0", NATURAL, 3, 2, 
 m_0, m_1, m_2, m_3, m_4, m_5)
 *Marker(m_0, "Marker 0", b_1, p_1)
 *Marker(m_1, "Marker 1", b_1, p_2)
 *Marker(m_2, "Marker 2", b_1, p_3)
 *Marker(m_3, "Marker 3", b_1, p_4)
 *Marker(m_4, "Marker 4", b_1, p_5)
 *Marker(m_5, "Marker 5", b_1, p_6)
 *Body(b_1, "Body 1")
 *Body(b_0, "Body 0")
 
*PointToDeformableSurfaceContact(con_0, "Contact 0", b_0, p_1, 
 LINEAR, defsrf_0, false)
 
*SetContact(con_0, 5, 100, 1.0)
 *Point(p_10, "Point 0" )
 *Set(defsrf_0.uspan, 1.1)
 *SetPoint(p_1, 50, 10, 10)
 *SetPoint(p_2, 100, 10, 10)
 *SetPoint(p_3, 150, 10, 10)
 *SetPoint(p_4, 50, 20, 20)
 *SetPoint(p_5, 100, 20, 20)
 *SetPoint(p_6, 150, 20, 20)
 *SetPoint(p_10, 100, 100, 100)
*EndMDL()

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Properties

Table 1.
Property	Returns Data Type	Description
damping	real	The damping used with the linear contact method.
flip_normal	boolean	Flag to flip the normals of the deformable surface.
force_model		Use LINEAR for the linear algorithm method of contact.^Use POISSON for the Poisson method of contact.
id	integer	The solver id for the entity.
idstring	string	The solver id for the entity in string data form.
label	string	The descriptive name of the entity.
note	string	The detailed notes and description about the entity.
penalty	real	The penalty value used with the Poisson contact method.
radius	real	The radius of the sphere used in the contact.
rest_coeff	real	The restitution coefficient used with the Poisson contact method.
state	boolean	Set to zero for the entity to be inactive, or set to one for the entity to be active.
stiffness	real	The stiffness used with the linear contact method.
type	datatype	The type of contact.
varname	string	The unique variable name of the entity.

Comments

This entity can be used to represent flex to rigid or flex to flex contact, by creating one *PointToDeformableSurfaceContact entity for each potential point of contact. The deformable surface can attach to the flexbody, while the sphere is used to represent a potential point of contact on the rigid body (or a second flexible body).