!CONTACT_PARAM¶

Specifies contact detection parameters.

Parameters¶

Parameter name	Attribute	Description
NAME	C	Contact detection parameter name (required)

** 2nd line **

Specifies the various clearances for the in-plane method.

    (2nd line)　CLEARANCE, CLR_SAME_ELEM, CLR_DIFFLPOS, CLR_CAL_NORM

Variable name	Attribute	Description
CLEARANCE	R	Normal clearance (default: 1e-2)
CLR_SAME_ELEM	R	Clearance for elements already in contact (relax this if they move too much) (default: 5e-3)
CLR_DIFFLPOS	R	Clearance for treating points within an element as different points (relax this if oscillation occurs) (default: 1e-2)
CLR_CAL_NORM	R	Clearance for treating a point as being on an edge when calculating the normal (default: 1e-4)

** 3rd line **

Specifies the various out-of-plane clearances and related parameters.

    (3rd line)　DISTCLR_INIT, DISTCLR_FREE, DISTCLR_NOCHECK, TENSILE_FORCE, BOX_EXP_RATE

Variable name	Attribute	Description
DISTCLR_INIT	R	Out-of-plane clearance used for the initial detection (default: 1e-2)
DISTCLR_FREE	R	Out-of-plane clearance used to determine non-contact nodes (a node is regarded as being in contact after slight penetration) (default: -1e-6)
DISTCLR_NOCHECK	R	Out-of-plane clearance used when skipping the distance-direction check for nodes already in contact (separation is determined by tensile force, so specify a large value to maintain the contact state) (default: 1.0)
TENSILE_FORCE	R	Tensile force at which separation is determined (default: -1e-2)
BOX_EXP_RATE	R	Expansion ratio of the BOX used for searching (smaller is faster, while larger is safer) (default: 1.05)

For settings identical to the defaults

    !CONTACT_PARAM, NAME=CPARAM1
    1.0e-2,  5.0e-3,  1.0e-2,  1.0e-4
    1.0e-2, -1.0e-6,  1.0,    -1.0e-2,  1.05