PARAM, CTSTF4PL

Bulk Data Entry Flag for tangential stiffness of closed gaps (closed contact elements) in nonlinear preloaded linear analysis.

Parameter	Values	Description
CTSTF4PL	<0, 1, 2>	0 (Default) ON Closed gaps of STICK contact. ON Closed sticking gaps of frictional contact (MU1 > 0). OFF Closed slipping gaps of frictional contact (MU1 > 0). OFF Closed gaps of SLIDE contact (MU1 = 0). 1 ON Closed gaps of STICK contact. ON Closed sticking gaps of frictional contact (MU1 > 0). ON Closed slipping gaps of frictional contact (MU1 > 0). OFF Closed gaps of SLIDE contact (MU1 = 0). 2 ON Closed gaps of STICK contact. ON Closed sticking gaps of frictional contact (MU1 > 0). ON Closed slipping gaps of frictional contact (MU1 > 0). ON Closed gaps of SLIDE contact (MU1 = 0). ON Tangential stiffness is same as the normal stiffness, which implies that it behaves as a frozen gap. OFF Tangential stiffness is zero.