Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How to unloop a self-adherent sheet   The mechanics of adherent sheets is central to applications ranging from
patching a band aid, coating technology, to the breakthrough discovery of
peeling graphene flakes using sticky tape. These processes are often hindered
by the formation of blisters and loops, which are notoriously difficult to
remove. Here we describe and explain a remarkable phenomenon that arises when
one attempts to remove a loop in a self-adherent sheet that is formed by, e.g.,
folding two adhesive sides of a tape together. One would expect the loop to
simply unloop when pulling on its free ends. Surprisingly, however, the loop
does not immediately open up but shrinks in size, held together by a tenuous
contact region that propagates along the tape. This adhesive contact region
only ruptures once the loop is reduced to a critical size. We experimentally
show that the loop-shrinkage results from an interaction between the peeling
front and the loop, across the contact zone. This new type of interaction falls
outside the realm of the classical elastica theory and is responsible for a
highly nonlinear increase in the peeling force. Our results reveal and quantify
the increased force required to remove loops in self-adherent media, which is
of importance for blister removal and exfoliation of graphene sheets.

1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom