International Journal of Modern Physics B,
Год журнала:
2024,
Номер
unknown
Опубликована: Фев. 26, 2024
This
study
investigates
the
specific
energy
absorption
(SEA)
capacity
and
auxetic
behavior
of
PCSs
subjected
to
low-velocity
impact
(LVI).
VeroWhite
resin
is
selected
as
base
material.
Instead
traditional
studies
conducted
across
varying
loading
velocities
or
cyclic
layers,
we
investigate
PCSs’
through
a
parametric
employing
an
orthogonal
design.
Three
structural
geometric
parameters
are
considered
factors,
with
each
factor
comprising
four
levels.
The
table
yields
16
unique
combinations,
corresponding
distinct
geometries.
collective
SEA
assessment
these
combinations
identifies
“optimum
combination”,
whose
exceptional
demonstrates
feasibility
proposed
approach
for
tailoring
properties
cellular
structures.
Additionally,
findings
reveal
that
incorporating
convex
feature
into
geometry
conventional
re-entrant
honeycomb
structures
significantly
influences
their
capabilities.
work
introduces
new
simple
method
conducting
on
mechanical
structures,
enabling
identification
peak
values.
employed
strategy
also
holds
promise
investigating
acoustic
thermal
Materials & Design,
Год журнала:
2024,
Номер
243, С. 113052 - 113052
Опубликована: Май 27, 2024
Flexible
sensors
show
the
wide
range
of
applications
in
electronic
products.
However,
challenges
remain
developing
with
internal
complex
construction,
excellent
flexibility,
elasticity
and
strength.
In
this
paper,
a
prepolymer
(PU-PDMS-OH-HEMA)
contain
polyurethane
(PU)
segments
polysiloxane
(PDMS)
was
synthesized,
photosensitive
resins
low
viscosity
for
3D
printing
were
prepared
by
mixing
prepolymers
diluents
photoinitiators.
The
resultant
cured
showed
improved
mechanical
properties.
PDMS-OH-30
sample
exhibit
properties,
tensile
strength
elongation
at
break
10.03
MPa
1046.15
%,
respectively,
resin
62
cP.
Conductive
ionic
liquids
added
to
above
prepare
flexible
sensors,
which
electrical
sensitivity
stability.
findings
work
propose
contribution
development
highly
fabricating
sensors.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
Abstract
This
study
experimentally
demonstrates
the
reprogrammability
of
a
rotating‐squares‐based
mechanical
metamaterial
with
an
embedded
array
permanent
magnets.
How
orientation,
residual
magnetization,
and
stiffness
magnets
influence
both
static
dynamic
responses
is
systematically
investigated.
It
showed
that
by
carefully
tuning
magnet
orientation
within
metamaterial,
notable
tunability
response
can
be
achieved
across
regimes.
More
complex
magnetic
node
configurations
optimize
specific
structural
decoupling
quasi‐static
stress–strain
behavior
from
energy
absorption
under
impact
loading.
Additionally,
further
enhanced
external
field,
which
modulates
interactions
structure.
work
paves
way
for
developing
engineered
components
adaptable
responses,
reprogrammable
through
either
redistribution
elements
or
application
field.
Materials & Design,
Год журнала:
2024,
Номер
244, С. 113102 - 113102
Опубликована: Июнь 19, 2024
Two-dimensional
aperiodic
lattices
emerge
as
remarkably
isotropic
metamaterials
with
potentially
unconventional
mechanical
behavior.
This
study
investigates
numerically
estimating
the
effective
elastic
properties,
a
function
of
relative
density,
novel
two-dimensional
lattice
derived
from
recently
discovered
monotiles,
known
"Hat,"
"Turtle,"
and
"Spectre"
tiles.
Furthermore,
several
classes
Hat-based
lattices;
namely
Hexagon
(H),
Triangle
(T),
Parallelogram
(P),
Fan
(F),
are
also
investigated.
The
results
show
that
these
have
properties
independent
density.
Turtle
exhibit
larger
moduli,
gradually
converging
to
Spectre-based
density
increases.
A
distinctive
feature
is
their
directional
auxetic
behaviour
an
anisotropic
Poisson's
ratio,
whereas
only
at
lower
densities.
Despite
ratios,
current
maintain
isotropy,
offering
unique
blend
behavior
moduli.
contributes
better
understanding
monotile
potential
for
engineering
certain
applications.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Дек. 28, 2024
This
study
explores
the
impact
of
metallic
shells
by
electroforming
method
on
mechanical
behavior
thermoplastic
polyurethane
(TPU)-based
lattice
structures.
First,
TPU
structures
were
printed
additive
manufacturing
technique.
Then
layers
Ni
and
Cu
as
a
thin
shell
dressed
in
baths
solutions.
Finally,
uniaxial
compression
tests
achieved
samples.
Results
demonstrated
substantial
enhancements
performance
attributable
to
these
coatings.
Notably,
Ni-coated
structure
(Ni-LS)
exhibited
peak
yield
strength
4.55
MPa,
marking
1.08-fold
improvement
over
Ni-Cu-LS
1.35-fold
increase
relative
Ni-Cu-Ni-LS
variant.
Furthermore,
energy
absorption
density
coated
was
elevated
nearly
sixfold
compared
uncoated
lattice,
with
multi-layer
coatings
providing
additional
gains.
These
results
underscore
potential
Cu-coated
lattices
deliver
exceptional
strength-to-weight
ratios
enhanced
capabilities.
