Encyclopedia of Polymer Science and Technology,
Год журнала:
2023,
Номер
unknown, С. 1 - 21
Опубликована: Март 15, 2023
Abstract
Fatigue
failure
of
rubber‐like
materials
has
been
often
previously
modeled
with
classical
power‐law
approaches,
however
the
new
generation
physics‐based
fatigue
models,
choosing
proper
model
depends
on
material,
loading
condition
and
computational
cost
users
can
afford.
In
view
high
number
validated
it
is
challenging
for
engineers
to
choose
a
reliable
specific
application.
service
condition,
reliability
elastomeric
components
influenced
by
variety
factors,
ranging
from
environmental
mechanical
loads
compound
properties.
sensitive
applications,
assuring
long‐term
performance
elastomers
subjected
multiaxial
variable
necessary
ensure
durability
system.
The
purpose
this
article
review
different
stressors
that
contribute
associated
modeling
approaches
used
assess
their
strengths
weaknesses.
Additionally,
summarizes
effect
thermal
oxidation,
moisture,
hydrolysis,
radiation
aging
properties
rubber,
which
studied
over
last
50
years.
Continuum Mechanics and Thermodynamics,
Год журнала:
2024,
Номер
36(3), С. 657 - 698
Опубликована: Март 30, 2024
Abstract
In
the
field
of
material
modeling,
thermoplastic
polymers
are
often
studied
because
their
complex
behavior
and
prevalence
in
industry
applications
due
to
low
cost
wide
range
applications.
Nowadays,
where
reusability
becomes
more
important,
materials
which
can
undergo
reversible
thermomechanical
deformations
appealing
for,
e.g.,
construction
car
body
components.
To
predict
such
forming
processes
with
multiple
influencing
factors,
as
temperature,
strain
rate
or
underlying
morphology,
model
formulations
needed
that
account
for
these
influences
simultaneously
validated
against
experimental
data.
Unfortunately,
up
now
only
a
few
contributions
available
consider
all
phenomena.
addition,
process
parameters
considered
is
narrow
effort
required
testing.
This
usually
results
limited
predictive
capabilities
model.
overcome
limitations,
this
work,
thermo-mechanically
coupled
developed
accounts
morphology
terms
degree
crystallinity
(DOC).
The
formulation
derived
thermodynamically
consistent
manner,
incorporating
nonlinear
visco-elastic
elasto-plastic
at
finite
strains.
characterize
further
validate
model,
mechanical
well
thermal
experiments
conducted
polyamide
6
(PA6).
Here,
blending
strategy
PA6
together
an
amorphous
co-polymer
introduced
during
specimen
production
achieve
wider
stable
DOCs(approximately
15%).
successfully
applied
its
predictions
good
agreement
observations.
Polymers,
Год журнала:
2024,
Номер
16(3), С. 391 - 391
Опубликована: Янв. 31, 2024
Development
of
load-bearing
fiber
reinforced
plastic
(hereinafter
referred
to
as
FRP)
composite
structures
in
civil
engineering,
exploited
under
high
temperatures,
such
industrial
chimneys
and
gas
ducts,
requires
the
knowledge
their
long-term
behavior
constant
cyclic
mechanical
temperature
loads.
Such
conditions
mean
that
viscoelasticity
FRP
should
be
considered
along
with
thermal
aging
effect.
This
research
is
devoted
effects
on
viscoelastic
polymers.
Two
sets
experiments
were
conducted:
creep
tensile
tests
heating
a
constrained
state.
The
Kelvin–Voigt
model
was
used
determine
rheological
parameters
binder
from
experimental
curves.
Cyclic
compare
normal
thermally
aged
binders
evaluate
possibility
stress
accumulation.
Fourier-transform
infrared
spectroscopy
for
polymer’s
structural
changes
investigation.
Both
showed
non-aged
glassed
polymer
GP)
prone
behavior,
while
GP
lost
viscosity
worked
almost
perfectly
elastic.
It
assumed
long
heat
treatment
had
caused
inner
structure
GP,
reducing
number
weak
bonds
increasing
elastic
ones.
Therefore,
results
show
designing
structures,
thermomechanical
load,
using
taking
into
account
properties
after
treatment.
