Abstract
Using a high speed camera, we study the peeling dynamics of an
adhesive tape under a constant load with a special focus on the
so-called stick-slip regime of the peeling. It is the first time
that the very fast motion of the peeling point is imaged. The
speed of the camera, up to 16000 fps, allows us to observe and
quantify the details of the peeling point motion during the stick
and slip phases: stick and slip velocities, durations and
amplitudes. First, in contrast with previous observations, the
stick-slip regime appears to be only transient in the force
controlled peeling. Additionally, we discover that the stick and
slip phases have similar durations and that at high mean peeling
velocity, the slip phase actually lasts longer than the stick
phase. Depending on the mean peeling velocity, we also observe
that the velocity change between stick and slip phase ranges from
a rather sudden to a smooth transition. These new observations can
help to discriminate between the various assumptions used in
theoretical models for describing the complex peeling of an
adhesive tape. The present imaging technique opens the door for an
extensive study of the velocity controlled stick-slip peeling of
an adhesive tape that will allow to understand the statistical
complexity of the stick-slip in a stationary case.
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