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@ARTICLE{Carbone:48860,
author = {Carbone, G. and Persson, B. N. J.},
title = {{C}rack motion in viscoelastic solids: role of the flash
temperature},
journal = {The European physical journal / E},
volume = {17},
issn = {1292-8941},
address = {Berlin},
publisher = {Springer},
reportid = {PreJuSER-48860},
pages = {261},
year = {2005},
note = {Record converted from VDB: 12.11.2012},
abstract = {We present a simple theory of crack propagation in
viscoelastic solids. We calculate the energy per unit area,
G(v), to propagate a crack, as a function of the crack tip
velocity v. Our study includes the non-uniform temperature
distribution (flash temperature) in the vicinity of the
crack tip, which has a profound influence on G(v). At very
low crack tip velocities, the heat produced at the crack tip
can diffuse away, resulting in very small temperature
increase: in this "low-speed" regime the flash temperature
effect is unimportant. However, because of the low heat
conductivity of rubber-like materials, already at moderate
crack tip velocities a very large temperature increase (of
order of 1000 K) can occur close to the crack tip. We show
that this will drastically affect the viscoelastic energy
dissipation close to the crack tip, resulting in a
"hot-crack" propagation regime. The transition between the
low-speed regime and the hot-crack regime is very abrupt,
which may result in unstable crack motion, e.g. stick-slip
motion or catastrophic failure, as observed in some
experiments. In addition, the high crack tip temperature may
result in significant thermal decomposition within the
heated region, resulting in a liquid-like region in the
vicinity of the crack tip. This may explain the change in
surface morphology (from rough to smooth surfaces) which is
observed as the crack tip velocity is increased above the
instability threshold.},
keywords = {J (WoSType)},
cin = {IFF-TH-I},
ddc = {530},
cid = {I:(DE-Juel1)VDB30},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK242},
shelfmark = {Chemistry, Physical / Materials Science, Multidisciplinary
/ Physics, Applied / Polymer Science},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:15997339},
UT = {WOS:000232026500002},
doi = {10.1140/epje/i2005-10013-y},
url = {https://juser.fz-juelich.de/record/48860},
}