International Journal of Applied Mechanics,
Год журнала:
2024,
Номер
16(09)
Опубликована: Авг. 23, 2024
The
polymer
chain
network
within
the
dielectric
elastomers
(DEs)
contains
numerous
entanglements,
crosslinks
and
finite
extensibility,
all
of
which
play
a
substantial
role
in
nonlinear
deformation
behavior
DE-based
phononic
crystals.
In
this
study,
theoretical
model
is
proposed
to
investigate
intricate
interplay
between
internal
their
influence
on
tunable
band
gap
properties
soft
elastomer
To
capture
inherent
characteristics
network,
physics-based
nonaffine
material
employed.
By
incorporating
electro-elasticity
theory
linearized
incremental
theory,
equations
governing
voltage-induced
superimposed
anti-plane
shear
waves
are
formulated.
Employing
element
method
Bloch’s
theorem,
structure
an
infinite
periodic
DE
crystal
extracted.
numerical
results
reveal
that
under
higher
electric
fields,
intrinsic
significantly
impact
outcomes
simulations
insights
derived
from
study
offer
valuable
guidance
for
design
manufacturing
electro-statically
structures.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(29)
Опубликована: Март 11, 2024
Abstract
Metamaterials
(MMs),
which
include
phononic
crystals
(PCs)
as
a
particular
type,
exhibit
anomalous
wave
propagation
properties
through
artificial
design
of
topologies
or
lattice
forms
unit‐cells.
Recent
advancements
in
MMs
signify
an
ascendant
research
trend,
providing
promising
ideas
and
means
for
unprecedented
properties.
The
imperative
on‐demand,
real‐time
active
control
underscores
the
significance
tunable
manipulation
acoustic/elastic
waves,
promoting
development
MMs.
Furthermore,
versatility
intelligent
materials
their
ongoing
innovation
contribute
significantly
to
emergence
diverse
This
comprehensive
survey
provides
overview
recent
current
trends
interdisciplinary
field
with
electro‐/magneto‐mechanical
couplings.
primary
objective
review
is
emphasize
significant
progress
agile
waves
coupled
MMs,
followed
by
in‐depth
exploration
metasurfaces,
topological
non‐Hermitian
parity‐time
symmetric
systems,
odd
elastic
spatiotemporally
modulated
Special
emphasis
given
multi‐field
coupling
effects.
concludes
summary
outlines
potential
prospects,
offering
timely
informative
guide
future
studies
on
actively
PCs
practical
engineering
applications.
International Journal of Solids and Structures,
Год журнала:
2024,
Номер
289, С. 112648 - 112648
Опубликована: Янв. 4, 2024
We
propose
a
magnetic
field-induced
asymmetric
mechanical
metamaterial
for
tunable
transformation-based
elastic
cloaking.
The
is
designed
by
integrating
hard-Magnetic
Active
Elastomers
(hMAEs)
and
combining
zero-stress
collapse
modes
to
produce
unique
behavior
controlled
an
external
field.
relationship
bridging
the
microstructure
desired
cloaking
performance
presented.
This
magneto-metamaterial
design
applied
achieve
static
theoretical
predictions,
together
with
numerical
tests
under
various
loads,
demonstrate
encouraging
performance.
study
also
highlights
impact
of
magneto-mechanical
coupling
offers
first
remotely-controllable
hMAE-based
solution,
promising
potential
in
applications
including
stress
shielding
stealth
technologies.
Journal of the Mechanics and Physics of Solids,
Год журнала:
2024,
Номер
187, С. 105626 - 105626
Опубликована: Март 23, 2024
We
propose
a
design
strategy
for
creating
origami-like
mechanical
metamaterials
with
diverse
non-linear
properties
and
capable
of
remote
actuation.
The
proposed
triangulated
cylindrical
origami
(TCO)-inspired
enable
the
highly
desirable
strain-softening/hardening
snap-through
behaviors
via
multi-material
deformable
hinge
design.
Moreover,
we
couple
these
novel
TCO
origami-inspired
transformative
ability
hard-magnetic
active
materials,
allowing
untethered
shape-
property-actuation
in
developed
metamaterials.
develop
mathematical
modeling
framework
metamaterials,
building
on
approximating
hinges
as
combination
longitudinal
rotational
springs.
validate
accuracy
approach
by
comparing
analytically
predicted
compressive
response
unit
cell
structure
corresponding
numerical
experimental
results.
Using
framework,
investigate
magnetic
field-induced
large
deformation
superimposed
solitary
wave
propagation
metamaterial
system.
show
that
allows
us
to
tune
key
characteristics
enabled
waves,
including
their
characteristic
width
amplitude.
readily
manufacturable
systems
paves
path
practical
engineering
applications.
Our
studies
also
underscore
potential
magneto-mechanical
interaction
reconfigurable
superior
elastic
properties.
Journal of Applied Mechanics,
Год журнала:
2024,
Номер
91(6)
Опубликована: Фев. 19, 2024
Abstract
This
study
focuses
on
investigating
hard-magnetic
soft
materials,
characterized
by
magnetoactive
polymers
containing
magnetically
polarized
particles
as
fillers.
The
research
utilizes
the
Gent
model
of
hyperelasticity
to
analyze
propagation
Lamb
waves
in
a
induced
deformed
compressible
plate.
In
this
investigation,
we
explore
both
finite
deformations
and
incremental
wave
nonlinear
materials.
main
objective
is
formulate
elastic
tensor
relevant
equations
within
framework
Lagrangian
space.
To
assess
dispersion
characteristics
guided
wave,
introduces
discusses
an
extension
semi-analytical
element
(SAFE)
method.
Using
numerical
approach,
further
examines
effects
magnetic
flux
densities
its
orientation
with
respect
direction
fundamental
modes.
starts
examining
limiting
case
neo-Hookean
material
explain
such
inherent
dependencies.
These
dependencies
are
then
emphasized
including
strain-stiffening
effect
that
describes.
findings
reveal
presence
threshold
applied
flux,
beyond
which
Gent-type
may
undergo
snap-through
instability,
resulting
changes
symmetric
mode.
Journal of Applied Mechanics,
Год журнала:
2024,
Номер
91(10)
Опубликована: Июль 9, 2024
Abstract
Hard-magnetic
soft
materials,
which
exhibit
finite
deformation
under
magnetic
loading,
have
emerged
as
a
promising
class
of
active
materials
for
the
development
phononic
structures
with
tunable
elastic
wave
band
gap
characteristics.
In
this
paper,
we
present
gradient-based
topology
optimization
framework
designing
hard-magnetic
materials-based
two-phase
wide
and
magnetically
anti-plane
shear
gaps.
The
incompressible
Gent
hyperelastic
material
model,
along
ideal
is
used
to
characterize
constitutive
behavior
structure
phases.
To
extract
dispersion
curves,
an
in-house
element
model
in
conjunction
Bloch’s
theorem
employed.
method
moving
asymptotes
iteratively
update
design
variables
obtain
optimal
distribution
phases
within
unit
cell.
Analytical
sensitivity
analysis
performed
evaluate
gradient
maximization
function
respect
each
one
variables.
Numerical
results
show
that
optimized
width
comparison
standard
central
circular
inclusion,
demonstrating
effectiveness
proposed
numerical
framework.
presented
study,
derived
conclusions,
can
serve
valuable
guide
futuristic
manipulators.
