Virtual and Physical Prototyping,
Год журнала:
2025,
Номер
20(1)
Опубликована: Март 4, 2025
This
study
presents
a
0-to-270°
wide-pattern
reconfigurable
antenna
incorporating
shape
memory
hinge.
The
substrate
is
3D-printed
using
polymer
(SMP)
and
high-temperature
filaments,
with
stretchable
silver
ink
applied
via
screen
printing.
To
enable
reconfiguration
in
response
to
thermal
stimuli,
the
folding
section
fabricated
from
SMP.
Leveraging
end-fire
radiation
characteristics
of
quasi-Yagi
antenna,
hinge
adjusts
direction.
antenna's
performance
was
evaluated
at
angles
−180°,
−90°,
0°,
90°.
In
flat
position
(0°),
measured
−10
dB
bandwidth
ranges
4.26
5.48
GHz,
peak
gain
4.01–7.49
dBi.
bandwidths
α
=
90°
are
4.22–5.45,
4.26–5.47,
4.28–5.54
respectively,
corresponding
gains
3.22–6.72,
4.52–7.07,
5.01–7.24
These
results
demonstrate
stable
frequency
across
different
angles.
With
its
straightforward
design
fabrication
process,
proposed
enables
beam
direction
adjustment
over
wide
angular
range,
offering
novel
approach
pattern
antennas.
Polymers,
Год журнала:
2024,
Номер
16(10), С. 1398 - 1398
Опубликована: Май 14, 2024
This
study
introduces
novel
PETG–ABS–Fe3O4
nanocomposites
that
offer
impressive
3D-
and
4D-printing
capabilities.
These
can
be
remotely
stimulated
through
the
application
of
a
temperature-induced
magnetic
field.
A
direct
granule-based
FDM
printer
equipped
with
pneumatic
system
to
control
output
melt
flow
is
utilized
print
composites.
addresses
challenges
associated
using
high
weight
percentage
nanoparticles
lack
over
geometry
when
producing
precise
continuous
filaments.
SEM
results
showed
interface
matrix
was
smooth
uniform,
increase
in
weakened
printed
layers.
The
ultimate
tensile
strength
(UTS)
increased
from
25.98
MPa
for
pure
PETG–ABS
sample
26.3
27.05
10%
15%
Fe3O4
nanocomposites,
respectively.
accompanied
by
decrease
elongation
15.15%
13.94%
12.78%.
shape-memory
performance
reveal
adding
iron
oxide
not
only
enables
indirect
remote
recovery
but
also
improves
effect.
Improving
heat
transfer
strengthening
elastic
component
rate
amount
shape
recovery.
Nanocomposites
containing
20%
demonstrate
superior
subjected
stimulation
field,
despite
exhibiting
low
quality
poor
strength.
Smart
remote-control
capabilities
provide
opportunities
4D
printing
diverse
industries,
particularly
medicine,
where
rapid
speed
are
essential
minimally
invasive
procedures.
Materials,
Год журнала:
2025,
Номер
18(6), С. 1220 - 1220
Опубликована: Март 9, 2025
The
evolution
of
thermoplastic
materials
has
played
a
critical
role
in
advancing
high-speed
Fused
Filament
Fabrication
(FFF)
and
Deposition
Modeling
(FDM)
3D
printing
technologies.
This
study
explores
the
performance
challenges
associated
with
next-generation
thermoplastics
specifically
designed
for
printing,
such
as
PLA,
ABS,
PETG,
comparison
to
conventional
materials.
A
systematic
analysis
was
conducted
evaluate
key
parameters,
including
mechanical
properties,
layer
adhesion,
surface
finish,
dimensional
accuracy,
under
varying
conditions.
results
reveal
that
thermoplastics,
when
coupled
advanced
hardware
optimized
motion
control
systems,
achieve
up
70%
reduction
time
without
significant
trade-offs
integrity
or
precision.
Additionally,
identifies
challenges,
increased
thermal
stresses,
warping,
need
precise
cooling
strategies,
which
can
impact
material
at
elevated
speeds.
Opportunities
future
development
are
also
discussed,
design
novel
polymer
formulations
innovations
further
enhance
reliability
scalability
FFF/FDM
printing.
work
underscores
potential
adopting
era
highlights
interplay
between
science
engineering
achieving
manufacturing
capabilities.
Polymers,
Год журнала:
2024,
Номер
16(16), С. 2260 - 2260
Опубликована: Авг. 9, 2024
The
article
presents
the
results
of
technical-economical
study
regarding
optimization
fused
deposition
modeling
(FDM)
parameters
(the
height
layer
deposited
in
one
pass-Lh
and
filling
percentage-Id)
for
manufacture
Polyethylene
Terephthalate
Glycol
(PETG)
Acrylonitrile
Styrene
Acrylate
(ASA)
parts.
To
carry
out
this
study,
was
used
fundamental
principle
value
analysis,
which
consists
maximizing
ratio
between
Vi
Cp,
where
represents
mechanical
characteristic,
Cp
production
cost.
show
that
tensile
specimens
made
PETG,
parameter
significantly
influences
Vi/Cp
ratios
is
pass,
(Lh),
case
compression
percentage
(Id).
In
manufactured
via
FDM
from
ASA,
decisively
By
performing
process
with
multiple
responses,
we
identified
optimal
manufacturing
parts
PETG
ASA:
Lh
=
0.20
mm,
percentage,
Id
100%.
Macromolecular Rapid Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 27, 2025
Abstract
4D
printing,
which
combines
the
design
freedom
of
3D
printing
with
responsiveness
smart
materials,
is
revolutionizing
creation
active
structures.
These
structures
can
change
shape
in
response
to
external
stimuli,
paving
way
for
advancements
robotics,
biomedicine,
and
beyond.
However,
a
comprehensive
review
article
highlighting
recent
printed
memory
actuators
(SMAAs)
lacking.
This
explores
exciting
potential
intelligent
SMAAs.
It
examines
concept
materials
used,
like
shape‐memory
polymers
(SMPs),
alloys
(SMAs),
polymer
composites
(SMPCs).
then
dives
into
compatible
techniques
principles
achieving
programmed
changes.
Different
categories
SMAAs
are
explored,
showcasing
their
applications
diverse
fields.
The
concludes
by
discussing
challenges
future
directions,
emphasizing
massive
creating
next
generation
actuators,
making
it
valuable
resource
researchers
field.
Polymers for Advanced Technologies,
Год журнала:
2025,
Номер
36(3)
Опубликована: Март 1, 2025
ABSTRACT
Spinal
fusion
cages
play
a
crucial
role
in
stabilizing
the
spine
and
promoting
bone
growth
degenerative
disorders.
Recent
advancements
biodegradable
polymer‐based
have
introduced
materials
with
shape
memory
properties,
enabling
minimally
invasive
implantation
improved
adaptability.
This
study
focuses
on
development
of
4D‐printed
PLA/PCL
blend
spinal
cages,
investigating
their
thermal,
mechanical,
biodegradation,
alongside
surface
wettability
through
contact
angle
measurements.
The
novelty
this
lies
identifying
optimal
ratio,
balancing
mechanical
strength,
biodegradability,
behavior
for
applications.
findings
highlight
(80:20)
as
most
suitable
composition,
offering
well‐balanced
combination
properties.
Differential
scanning
calorimetry
(DSC)
analysis
revealed
that
20
wt%
PCL
enhances
toughness,
flexibility,
crystallinity
while
slightly
reducing
glass
transition
temperature.
Mechanical
testing
showed
fracture
elongation
at
tensile
stress
peaking
before
decreasing
higher
concentrations
due
to
increased
ductility.
Biodegradation
studies
confirmed
an
increasing
degradation
rate
content,
measurements
indicated
greater
hydrophilicity,
though
trend
reversed
concentrations.
Shape
demonstrated
content
from
10
60
wt%,
recovery
decreased
76.07%
61.28%,
high
fixity
(96.42%–99.80%)
was
maintained.
PLA/PCL20
exhibited
74.5%
effect
68.75%
cage
design,
making
it
promising
material
Materials Research Express,
Год журнала:
2024,
Номер
12(1), С. 015301 - 015301
Опубликована: Дек. 19, 2024
Abstract
This
study
focused
on
a
modified
Fused
Deposition
Modeling
(FDM)
3D
printing
method,
specifically
the
direct
pellet
of
propylene-based
thermoplastic
elastomer,
Vistamaxx™
6202,
to
address
challenges
like
printability
and
weak
mechanical
properties.
The
main
objective
was
optimizing
parameters
investigating
their
impact
Taguchi
method
used
design
experiments,
reducing
required
experiments
maximize
desired
Three
influential
were
chosen,
each
changing
three
levels.
By
employing
number
decreased
from
27
full
factorials
9.
Regression
models
created
through
analysis
variance
(ANOVA)
verified
by
additional
experiments.
Tensile
tests
performed
according
ASTM
D638
standard.
SEM
imaging
assess
interlayer
adhesion
structural
integrity.
results
demonstrated
satisfactory
integrity
printed
samples.
Notably,
elastomers
achieved
significant
stretchability,
reaching
up
5921.3%.
tensile
strength
5.22
MPa,
with
modulus
1.7
MPa.
effect
parameter
contribution
percentage
strength,
elongation,
elastic
obtained
analysis.
Smart Materials and Structures,
Год журнала:
2024,
Номер
33(8), С. 085027 - 085027
Опубликована: Июль 22, 2024
Abstract
Shape
memory
polymer
(SMP)
lattice
structures
have
garnered
considerable
attention
due
to
their
intrinsic
capability
for
self-recovery
and
mechanical
reconfiguration.
The
temporal
path,
encompassing
aspects
such
as
recovery
time
deployment
sequence,
of
the
shape
process
in
SMP
holds
paramount
significance
across
various
domains,
including
but
not
limited
medical
devices
space
deployable
structures.
Nonetheless,
programming
or
sequences
structures,
particularly
scenarios
devoid
external
controllers,
remains
a
challenge.
In
addressing
these
challenges,
this
study
presents
novel
class
endowed
with
customizable
thermal
times
programmable
sequences,
leveraging
influence
structural
geometry.
Notably,
serialized
behavior
proposed
structure
are
achieved
within
constant
temperature
environment,
obviating
need
time-varying
stimuli.
Finite
element
simulations
experimental
validations
corroborate
that
can
be
programmed
exhibit
spanning
from
mere
seconds
several
hundred
seconds.
Moreover,
three-stage
sequential
is
attained
without
necessitating
prior
local
configuration
programming.
Furthermore,
exploiting
distinctive
reversibility
inherent
high-temperature
designed
showcases
ability
transition
multiple
distinct
stable
configurations
by
modulating
duration
exposure.
thus
viable
avenue
realizing
intricate
multistage
controllable
shape-shifting
control
equipment.
