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Residual print in elastic-plastic contacts accounts for plastic strain region contribution to surface normal displacement, thus modifying pressure distribution by superimposing the elastic part of displacements. The mathematical formulation is based on Betti’s reciprocal theorem, and involves convolution-type products, which are computed using spectral methods. When contacting bodies receive the same elastic-plastic properties and contact geometry, interference equation is updated by modifying the term related to residual displacement. Residual print depths obtained experimentally from indentation of a lead specimen with a rigid sphere match well the numerical predictions of the newly proposed computer code.

RESIDUAL PRINT IN ELASTIC-PLASTIC CONTACTS