5. Speed discontinuities
5.1 Internal discontinuities
RPP behavior is mathematically compatible with the existence of velocity discontinuities along internal metal surfaces S
c
. Physically, these velocity discontinuities represent zones where the velocity field exhibits very high gradients, as can be seen, for example, at the boundary of the "dead" (quasi-rigid) zones that form in the vicinity of tools in the forging of solid products ("blacksmith's cross"), in the rolling of heavy plates, in flat-die spinning
Due to the conservation of...
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Speed discontinuities
Global properties of tool-induced plastic flow
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