Features and verification
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This documentation describes the modeling of touch-friction by the so-called "continuous" method. For its use, we can refer to the user documentation for the DEFI_CONTACT command and to the modeling manual U2.04.04.

There are around sixty test cases validating the various functionalities related to touch/friction, including:


* The Hertz contact test case: see ssnv104;


* The rubbing pad test case: see ssnv128;


* Test cases from benchmark NAFEMS on touch/friction: see ssna122, ssnp154, ssnp155, ssnp156 and ssnp157;


* The "shallow ironing" test case, see ssnp153;