Polymer Engineering and Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 6, 2025
Abstract
This
paper
explores
the
potential
applications
of
4D
printing
technology
in
aerospace
field,
with
a
focus
on
mechanical
properties
and
reusability
honeycomb
metamaterials
shape
memory
characteristics
fabricated
using
polymers
(SMPs).
Currently,
research
SMP‐based
is
limited,
particularly
regarding
influence
cellular
unit
geometries
their
recovery
performance,
which
remains
unclear.
To
address
this
gap,
study
combines
typical
units
positive,
negative,
zero
Poisson's
ratio
into
various
structures.
Through
quasi‐static
compression
experiments,
complemented
by
three‐dimensional
digital
image
correlation
(DIC)
finite
element
analysis,
performance
deformation
mechanisms
three
structures
are
compared
detail.
The
patterns
under
elucidated,
geometric
shapes
behavior
response
analyzed.
Shape
including
single‐cycle
multi‐cycle
tests,
designed
to
evaluate
smart
terms
key
metrics
such
as
rate
restoring
force.
systematically
characterizes
compressive
different
combinations,
providing
significant
guidance
for
development
4D‐printed
metamaterials.
Highlights
Metamaterial
combining
cells
ratios.
DIC
FEM
used
assess
effects
failure.
ZAZ
structure
shows
superior
stiffness
energy
absorption
compression.
Evaluate
SMP
loading
conditions.
ZAP
exhibits
more
stable
cyclic
loading.
International Journal of Mechanical Sciences,
Год журнала:
2024,
Номер
275, С. 109309 - 109309
Опубликована: Апрель 20, 2024
The
present
study
aims
at
developing
reusable
metamaterials
fabricated
by
4D
printing
technology.
Honeycomb
were
manufactured
via
fused
deposition
modeling
(FDM)
with
shape
memory
polymers
(SMPs).
reusability
of
these
was
determined
through
cyclic
cold
programming
experiments,
where
each
cycle
involved
a
loading-unloading-heating
(shape
recovery)-cooling
process.
novelty
this
paper
lies
not
only
in
experimentally
demonstrating
the
recoverability
reversing
plastic
deformation
based
on
effect
SMPs,
but
also
studying
their
SMP
under
and
materials
unit-cell
types
mechanical
degradation.
results
reveal
that,
one
single
compression
cycle,
polylactic
acid
(PLA)
hexagonal
honeycomb
dissipated
22%
more
energy
than
polyethylene
terephthalate
glycol
(PETG)
counterpart
because
higher
elastic
modulus
PLA
leads
to
larger
critical
buckling
load
for
segments
structures.
Furthermore,
PETG
re-entrant
25%
due
its
negative
Poisson's
ratio
overall
uniform
pattern.
More
importantly,
it
is
found
that
multiple
cycles,
maintained
an
dissipation
capacity
78.3%
Cycle
6,
nearly
3.5
times
as
result
better
ductility
PETG.
Moreover,
could
be
reused
17
while
12
cycles.
This
unit
cells
are
failure-resistant
less
concentration
deformation.
demonstrate
constituent
unit-cells
failure
resistance
can
reduce
degradation,
thereby
exhibiting
metamaterials.
Mechanics of Advanced Materials and Structures,
Год журнала:
2025,
Номер
unknown, С. 1 - 16
Опубликована: Янв. 3, 2025
The
plate-lattice
metamaterial
structure
has
multifunctional
characteristics
and
excellent
mechanical
properties,
such
as
face-centered
cubic
(FCC)
structure.
In
this
paper,
the
quasi-static
compression
properties
of
FCC
structures
are
investigated
based
on
experiments
numerical
simulations,
compared
with
truss
structures.
proposed
prepared
by
Fused
Deposition
Modeling
(FDM)
3D
printing
technology
PLA
(Polylactic
Acid)
material.
deformation
mechanism
is
analyzed
using
Digital
Image
Correlation
(DIC)
method
finite
element
simulation,
together
influence
geometric
parameters
(i.e.
cell
size,
wall
thickness,
hole
radius)
compressive
properties.
better
performance
than
at
same
relative
density.
As
width-to-thickness
ratio
decreases
density
increases,
elastic
modulus
yield
stress
significantly
improve.
per
unit
volume
energy
absorption
while
overall
increasing
firstly
then
decreasing.
relationship
between
can
be
predicted
Gibson-Ashby
model.
