The stick-slip dynamics is considered from the nonlineardifferential-algebraic equation (DAE) point of view and the peeling dynamics isshown to be a switching differential index DAE model. In the stick-slip regimewith bifurcations, the differential index can be arbitrarily high. The timescale of the peeling velocity, the algebraic variable, in this regime is shownto be exponentially faster compared to the angular velocity of the spool and/orthe stretch rate of the tape. A homogenization scheme for the peeling velocitywhich is characterized by the bifurcations is discussed and is illustrated withnumerical examples.
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