Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Velocity jump in the crack propagation induced on a semi-crystalline
  polymer sheet by constant-speed stretching   It has long been known for elastomers that the velocity of crack propagation
jumps as a function of strain. On the other hand, such a jump has not been
reported in the literature for polymers which do not exhibit a rubbery plateau
in the storage-modulus plot. Here, we report observation of jumps in crack
propagation for semi-crystalline polymer sheets without the rubbery plateau, as
a result of pulling the sheets at a constant speed. We discuss the advantages
of this crack-propagation test under constant-speed stretching and provide
physical interpretation of the velocity jump observed for non-elastomer sheets
on the basis of a recently proposed theory for the velocity jump in crack
propagation.

21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics