Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A critical evaluation of dynamic fracture simulations using cohesive
  surfaces   Finite element calculations of dynamic fracture based on embedding cohesive
surfaces in a continuum indicate that the predictions are sensitive to the
cohesive law used. Simulations were performed on a square block in plane strain
with an initial edge crack loaded at a constant rate of strain. Cohesive laws
that have an initial elastic response were observed to produce spontaneous
branching at high velocity, but to modify the linear elastic properties of the
body. As a consequence the cohesive surface spacing cannot be refined
arbitrarily and becomes an important length scale in the simulations. Cohesive
laws that are initially rigid do not alter the linear elastic response of the
body. However, crack branching behavior was not observed when such a cohesive
relation was implemented using a regular finite element mesh.

34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn