The numerical calculation of statically admissible slip-line field for plane strain compression of a three-layer symmetric strip between rigid plates

This paper present a method to build up statically admissible slip-line field (the of characteristics) and, as result, the stresses compression three-layer symmetric strip consisting two different rigid perfectly plastic materials between rough, parallel, plates (for case: shear yield stress inner layer is greater than that outer layer). Under conditions sticking regime at bi-material interfaces and sliding occurs surfaces with maximum friction, appropriate singularities on boundary have been assumed, then standard numerical technique supplemented iterative procedure calculate characteristic fields satisfy simultaneously well