Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
unknown, С. 1 - 25
Опубликована: Окт. 28, 2024
The
abstract
discusses
the
importance
of
Structural
Health
Monitoring
(SHM)
in
ensuring
reliability
and
health
structures.
It
introduces
a
novel
approach
for
recognizing
cracks
delamination
sandwich
composite
structures
using
advanced
methods
data
analysis
machine
learning
algorithms.
research
leverages
artificial
intelligence
to
accurately
identify
locate
damage
such
as
layers,
which
can
significantly
enhance
troubleshooting
performance,
improve
detection
accuracy,
reduce
time
cost
associated
with
repairs.
article
presents
technique
utilizing
regression
lattice
core,
capable
identifying
locating
multiple
delamination,
well
simultaneous
defects
structure.
is
conducted
based
on
structure's
healthy
damaged
conditions
Abaqus
software,
acceleration
responses
under
random
forces
obtained
through
finite
element
method
were
used
train
various
models,
including
algorithms
like
k-Nearest
Neighborhood
Regression
(KNN),
Light
Gradient
Boost
Machine
(LGBM),
Decision
Tree
(DTR)
detect
location.
results
indicate
that
neighborhood,
decision
tree
most
successful
functions,
respectively,
classification
models
identified
its
location
structure,
achieving
an
accuracy
rate
approximately
98.8%.
Journal of Composite Materials,
Год журнала:
2024,
Номер
58(9), С. 1123 - 1136
Опубликована: Фев. 19, 2024
The
optimal
performance
of
composites
enriched
with
hollow
spheres
has
been
reported
in
contemporary
literature,
whereas
their
thermal
properties
have
received
less
attention.
In
this
regard,
a
finite
element
method
(FEM)-based
micromechanical
model
developed
systematically
to
investigate
the
role
intra-matrix
embedding
on
conductivity
and
coefficient
expansion
(CTE)
unidirectional
fiber-reinforced
hybrid
composites.
so
doing,
concept
representative
volume
(RVE)
considers
microstructures
comprising
an
epoxy
matrix,
E-glass
fiber,
spheres,
assuming
perfect
bonding
(ideal
interface)
between
components
modified
approximate
periodic
boundary
conditions.
By
computing
longitudinal
transverse
temperature
gradients
generated
due
application
uniform
heat
flux
as
well
geometrical
variation
RVE
owing
enhancement,
CTE
respectively
determined.
Comprehensive
evaluations
conducted
examine
effects
microstructural-level
features,
including
fiber
content
orientation,
plus
thickness
effective
pseudo-porous
ternary
E-glass/epoxy
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(30), С. 39927 - 39941
Опубликована: Июль 17, 2024
This
study
focused
on
an
innovative
practical
method
using
computer
vision
for
particle
size
measurement,
which
serves
as
a
key
precursor
predicting
the
elastic
modulus
of
polymer
nanocomposites.
approach
involved
morphological
segmentation
nanodispersed
phase.
It
aimed,
first
time,
to
address
impractical
conditions
resulting
from
assumption
idealized
single-particle
sizes
in
monodispersed
system
during
modeling.
Subsequently,
micromechanical
finite
element
framework
was
employed
determine
interphase
thickness
and
ultrahigh
molecular
weight
polyethylene/nanozeolite
composites,
following
quantification
nanoparticle
sizes.
The
measurement
relied
images
extracted
scanning
electron
microscopy
micrographs
impact-fractured
surfaces.
To
compute
thickness,
experimental
data
fitted
interphase-inclusive
upper-bound
Hashin-Shtrikman
model,
with
measured
average
per
composition
serving
crucial
input.
computed
based
its
employing
hybrid
modified-Hashin-Hansen
Maxwell
model.
These
estimated
interfacial
variables
were
then
utilized
inputs
model
tensile
modulus.
A
comparison
between
results
revealed
maximum
discrepancy
3.29%,
indicating
effectiveness
methodology
quantifying
properties.
Advanced Engineering Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 12, 2024
This
study
explores
a
new
nanoplate
design's
thermal
and
mechanical
properties,
including
an
auxetic
core
with
negative
Poisson
ratio.
The
is
between
face
plates
made
of
barium–cobalt,
which
possess
magnetoelectroelastic
properties.
analysis
centers
on
the
parameters
θ
,
β
1
2
to
clarify
their
influence
nanoplate's
performance.
evaluations
thermal,
electrical,
magnetic
properties
showcase
its
remarkable
versatility
sensitivity.
Incorporating
improves
multifunctionality
nanoplate,
making
it
highly
promising
option
for
use
in
smart
technologies.
findings
offer
valuable
insights
into
distinctive
features
structures,
significantly
enhancing
comprehension
these
materials.
research
emphasizes
potential
creating
groundbreaking
applications
fields
like
aerospace
engineering
advanced
electronics,
where
versatile
adaptable
materials
play
vital
role.
contributes
broader
knowledge
practical
implementation
cutting‐edge
technological
solutions
by
exploring
interplay
mechanical,
Journal of Composite Materials,
Год журнала:
2024,
Номер
58(22), С. 2457 - 2471
Опубликована: Июль 1, 2024
Sandwich
structures
are
often
prone
to
catastrophic
failure
due
premature
separation
between
the
core
and
skin
layers.
Geometric
parameters,
such
as
thickness
of
core,
along
with
materials
used
in
their
manufacturing,
directly
influence
resistance
core.
This
study
explores
how
variations
affect
both
modes
maximum
load
capacity
sandwich
structures,
utilizing
experimental
testing
numerical
simulations.
Specimens
were
categorized
intact
pre-debonded
samples.
Each
specimen
featured
four
different
thicknesses
(3,
6,
8,
10
layers
composite
laminated
skins,
corresponding
0.68,
1.33,
1.73,
2.1
mm
respectively).
The
specimens
incorporated
a
foam-filled
square
corrugated
underwent
3-point
bending
tests.
Results
revealed
significant
shift
mode:
initially
observed
upper
fracture
(V-shaped
failure),
it
transitioned
skins
cores
increased
thickness,
particularly
presence
pre-debonding.
Notably,
predominant
mode
did
not
involve
without
pre-existing
crack.
Furthermore,
simulations
effectively
demonstrated
accurate
capture
loads
using
Hashin
cohesive
zone
model
(CZM).
Journal of Composites Science,
Год журнала:
2024,
Номер
8(9), С. 360 - 360
Опубликована: Сен. 14, 2024
The
objective
of
this
research
is
to
optimize
additive
manufacturing
processes,
specifically
Fused
Filament
Fabrication
(FFF)
techniques,
produce
sandwich
structures.
Mono-material
specimens
made
polylactic
acid
(PLA)
were
produced,
where
both
the
skin
and
core
fabricated
in
a
single
print.
To
process,
variations
base
cell
geometry
(Tri-Hexagon
Gyroid)
infill
(5%,
25%,
50%,
75%),
evaluating
their
effects
on
static
three-point
bending
behavior.
Optical
microscopy
was
employed
assess
structure
generated
by
fracture
modes.
findings
reveal
that
increasing
infill,
thus
density,
enhances
mechanical
properties
structure,
although
improvement
such
samples
with
50%
already
demonstrate
excellent
performance.
difference
between
hexagonal
Gyroid
structures
not
significant.
Based
microscopic
analyses,
it
believed
evolution
3D
printers,
from
open
closed
chamber
designs,
could
significantly
improve
deposition
various
layers.
