Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Asymmetric damage avalanche shape in quasi-brittle materials and
  sub-avalanches (aftershocks) clusters   Crackling dynamics is characterized by a release of incoming energy through
intermittent avalanches. The shape, i.e. the internal temporal structure of
these avalanches, gives insightful information about the physical processes
involved. It was experimentally shown recently that progressive damage towards
compressive failure of quasi-brittle materials can be mapped onto the
universality class of interface depinning when considering scaling
relationships between the global characteristics of the microcracking
avalanches. Here we show, for three concrete materials and from a detailed
analysis of the acoustic emission waveforms generated by microcracking events,
that the shape of these damage avalanches is strongly asymmetric, characterized
by a very slow decay. This remarkable asymmetry, at odds with mean-field
depinning predictions, could be explained, in these quasi-brittle materials, by
retardation effects induced by enhanced viscoelastic processes within a
fracture process zone generated by the damage avalanche as it progresses. It is
associated with clusters of sub-avalanches, or aftershocks, within the main
avalanche.

24
The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an