Low-velocity impact behavior of one-part engineered geopolymer composite under extreme temperatures
Composites Part A Applied Science and Manufacturing,
Год журнала:
2025,
Номер
unknown, С. 108739 - 108739
Опубликована: Янв. 1, 2025
Язык: Английский
Post-impact residual torsional strength and acoustic emission analysis of filament wound composite pipes
Polimery,
Год журнала:
2025,
Номер
70(1), С. 30 - 39
Опубликована: Фев. 19, 2025
The
residual
torsional
strength
of
composite
pipes
after
different
impact
loading
and
with
acoustic
emission
analysis
were
investigated.
It
was
shown
that
the
undamaged
samples
differ
significantly
depending
on
fiber
winding
angle.
a
angle
45°
showed
higher
compared
an
30°.
Язык: Английский
Calibration of the low‐velocity impact experiments
Polymer Composites,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 5, 2025
Abstract
Low‐velocity
impact
experiments
are
essential
for
evaluating
the
mechanical
behavior
and
resistance
of
composite
materials
in
engineering
applications.
These
primarily
based
on
measurement
force‐time
signal
a
few
parameters,
including
energy,
velocity,
mass.
All
other
such
as
displacement,
absorbed
subsequently
derived
from
these
fundamental
inputs.
This
paper
first
investigates
influence
miscalibration
force
signals,
highlighting
its
significant
reliability
calculated
energy.
Specifically,
error
10%
can
result
more
than
20%
maximum
deflection
over
40%
Second,
this
study
introduces
novel
calibration
method
principle
that
absorb
negligible
energy
during
low‐energy
impacts
below
damage
threshold.
The
proposed
is
validated
using
theoretical
mass‐spring
model,
demonstrating
effectiveness
improving
accuracy.
Calibration
enhances
consistency
values,
reducing
deviation
by
an
average
6.45%,
aligning
force‐displacement
curves
with
predictions.
Additionally,
procedure
significantly
reduces
residual
initial
range
1.084–1.226
J
to
0.013–0.030
J,
yielding
values
reliable
tests
conducted
at
energies
Hence,
highlights
importance
proper
provides
robust
framework
achieving
accurate
consistent
results.
Highlights
A
new
low‐velocity
proposed.
Incorrect
affects
accuracy
displacement.
ensures
absorption
estimates
polymer
composites.
It
reliability.
approach
improves
repeatability
experiments.
Язык: Английский
Low-velocity impact behaviour of flat and tapered Single-Double composites specimens
Composite Structures,
Год журнала:
2024,
Номер
355, С. 118823 - 118823
Опубликована: Дек. 26, 2024
Язык: Английский
Damage behavior of functionally graded kevlar/carbon epoxy nanocomposites reinforced with polyamide 6.6 nanofiber and MWCNTs subjected to low-velocity impact
International Journal of Damage Mechanics,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 9, 2024
The
use
of
carbon
and
kevlar
fiber-reinforced
composite
materials
continues
to
grow
in
high-tech
applications
such
as
aerospace
engineering.
One
the
most
desired
properties
structures
is
a
strong
interfacial
bond
between
matrix
fiber.
Nano-material
reinforcement
one
preferred
methods
for
strengthening
fiber-matrix
bond.
In
present
research,
polyamide
6.6
(PA
6.6)
nanofiber
multi-walled
nanotubes
(MWCNTs)
reinforced
fabric
(KF),
(CF)
epoxy
nanocomposite
plates
were
produced
by
functional
grading
these
two
fabrics.
PA
nanofibers,
obtained
electrospinning,
placed
layers,
12-layer
fabricated
using
vacuum-assisted
hand
lay-up
method.
producing
MWCNTs
plates,
0.3
wt.%
added
into
matrix.
A
comprehensive
set
16
distinct
was
manufactured,
encompassing
unreinforced
with
MWCNTs,
6.6,
combination
6.6-MWCNTs).
impact
strengths
investigated
at
energy
levels
20,
40
60
J.
effects
reinforcing
structure
6.6-MWCNTs,
well
functionally
KF/CF
on
strength,
detail.
damages
that
occurred
material
result
low-velocity
tests
interpreted
examining
high-resolution
camera
optical
microscope
images.
Thus,
nanoparticle
hybridization
effect
evaluated
together.
With
strength
samples
increased
significantly
compared
samples.
Moreover,
amount
damage
caused
test
reduced.
Язык: Английский
Tribologically enhanced self‐healing hybrid laminates for wind turbine applications
Polymer Composites,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 8, 2024
Abstract
Wind
turbines
are
subjected
to
extreme
weather
and
load
conditions;
hence,
high
strength
impact
resistance
required.
Furthermore,
wind
turbine
blades
can
be
loads
such
as
bird
strikes,
resulting
in
the
formation
of
microcracks.
Self‐healing
capsules
used
mend
for
microscale
damage.
The
incorporation
self‐healing
may
cause
a
decrease
mechanical
characteristics
composites
prior
resistance,
which
compensated
with
efficient
fillers
silicon
carbide
whiskers
(SiC
w
).
Thus,
novel
hybrid
composite
structure
is
examined
advantage
using
mechanism
SiC
reinforcement.
Tensile,
tribological,
Charpy
tests
were
performed
characterize
tribological
properties,
supported
microscopic
observations.
Multiple
experimental
characterizations
investigate
impact,
ultimate
tensile
(UTS)
energy
absorption
capacity
shown
increase
by
32%
45%,
respectively,
addition
.
presence
agents
provides
5%
rise
UTS
after
enough
time
healing
following
collision.
structure's
performance
improved
10%
wear
20%
friction
coefficient.
Highlights
Hybrid
laminated
whisker
capsules.
Tensile
conducted
observations
Increased
45%.
Tribological
improvement
Язык: Английский