Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the competition between dislocation transmission and crack nucleation
  at phase boundaries   The interaction of dislocations with phase boundaries is a complex
phenomenon, that is far from being fully understood. A 2D Peierls-Nabarro
finite element (PN-FE) model for studying edge dislocation transmission across
fully coherent and non-damaging phase boundaries was recently proposed. This
paper brings a new dimension to the complexity by extending the PN-FE model
with a dedicated cohesive zone model for the phase boundary. With the proposed
model, a natural interplay between dislocations, external boundaries and the
phase boundary, including decohesion of that boundary, is provided. It allows
one to study the competition between dislocation transmission and phase
boundary decohesion. Commonly, the interface potentials required for glide
plane behaviour and phase boundary decohesion are established through atomistic
simulations. They are corresponding to the misfit energy intrinsic to a system
of two bulks of atoms that are translated rigidly with respect to each other.
It is shown that the blind utilisation of these potentials in zero-thickness
interfaces (as used in the proposed model) may lead to a large quantitative
error. Accordingly, for physical consistency, the potentials need to be reduced
towards zero-thickness potentials. In this paper a linear elastic reduction is
adopted. With the reduced potentials for the glide plane and the phase
boundary, the competition between dislocation transmission and phase boundary
decohesion is studied for an 8-dislocation pile-up system. Results reveal a
strong influence of the phase contrast in material properties as well as the
phase boundary toughness on the outcome of this competition. In the case of
crack nucleation, the crack length shows an equally strong dependency on these
properties.

11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc