(1) *DATABASE_RCFORC: rcforc reports the total contact force (averaged over the preceding output interval). It says nothing about distribution of contact force among the segments. There are two optional output files/databases that can be used to assess contact force distribution, nodfor and intfor. The print flags SPR and MPR on Card 1 of *CONTACT must be used to flag which contacts produce output in these supplemental files. (2) *DATABASE_NODFOR: nodfor gives time histories of contact forces at nodes. (3) *DATABASE_BINARY_INTFOR: intfor is a binary database and requires that "s=" be used on the execution line to identify the actual name of the intfor database. *DATABASE_EXTENT_INTFOR can also be used to control the content of intfor to some extent, but it's not required. After running the analysis, open the intfor database in LS-PrePost as you would a d3plot database, e.g., by typing "lsprepost intfor". Use Selpar to select the contact surface of interest. You can fringe contact forces and contact stresses, as well as plot time histories of those quantities for particular nodes and segments. jd Ticket#2017042710000197 Internal notes: contact.rcforc readme.intfor