A low-frequency pure metal metamaterial absorber with continuously tunable stiffness
Applied Mathematics and Mechanics,
Год журнала:
2024,
Номер
45(7), С. 1209 - 1224
Опубликована: Июль 1, 2024
Abstract
To
address
the
incompatibility
between
high
environmental
adaptability
and
deep
subwavelength
characteristics
in
conventional
local
resonance
metamaterials,
overcome
deficiencies
stability
of
existing
active
control
techniques
for
band
gaps,
this
paper
proposes
a
design
method
pure
metal
vibration
damping
metamaterial
with
continuously
tunable
stiffness
wideband
elastic
wave
absorption.
We
dual-helix
narrow-slit
unit,
which
possesses
triple
advantage
spatial
compactness,
low
characteristics,
structural
stability,
enabling
opening
flexural
gaps
low-frequency
range.
Similar
to
principle
sliding
rheostat,
introduction
plug-ins
into
helical
slits
enables
continuous
variation
achieving
gap
effect.
This
successfully
extends
effective
by
more
than
ten
times.
The
experimental
results
indicate
that
unit
can
be
used
as
an
additional
absorber
absorb
energy
effectively.
Furthermore,
it
advances
absorbers
from
purely
passive
narrowband
one.
double-helix
metamaterials
retain
properties
are
suitable
deployment
harsh
environments.
Simultaneously,
adjusting
its
stiffness,
substantially
broadens
range,
presenting
promising
potential
applications
various
mechanical
equipment
operating
under
adverse
conditions.
Язык: Английский
Elastic wave spin and unidirectional routing in thin rod systems
International Journal of Mechanical Sciences,
Год журнала:
2024,
Номер
277, С. 109512 - 109512
Опубликована: Июнь 24, 2024
Язык: Английский
Rainbow trapping and concentration of surface waves on broad waveguide
Journal of Physics D Applied Physics,
Год журнала:
2024,
Номер
57(46), С. 465306 - 465306
Опубликована: Авг. 15, 2024
Abstract
In
recent
years,
topological
insulators
have
been
widely
designed
to
manipulate
various
types
of
classical
waves.
The
edge
states
characterized
by
defect
and
backscattering
immunity
show
great
application
potential
in
energy
harvesting.
This
work
reports
a
spin-locked
surface
wave
channel,
which
consists
concrete-filled
steel
tubes
(CFST)
placed
on
foundation
soil.
Here,
the
distance
between
lattice
center
CFST
controls
hopping
strength
adjacent
atoms,
determining
phase
transition.
Introducing
crystal
with
Dirac
cones
interface,
then
robust
broad
waveguide
modes
phononic
heterostructure
are
explored.
Notably,
incorporating
rainbow
effect
allows
for
precise
regulation
reliable
concentration
within
waveguide.
proposed
surpasses
traditional
waveguides
simultaneously
focusing
segregating
energy,
enabling
applications
low-frequency
harvesting,
sensing,
logic
gates.
Our
will
provide
an
efficient
recovery
platform
daily
vibration
especially
vehicle
loads.
Язык: Английский
Reconfigurable topological gradient metamaterials and potential applications
Thin-Walled Structures,
Год журнала:
2024,
Номер
205, С. 112572 - 112572
Опубликована: Окт. 15, 2024
Electro-mechanical multi-branch channel driven by higher-order topological rainbow
Mechanics of Advanced Materials and Structures,
Год журнала:
2025,
Номер
unknown, С. 1 - 12
Опубликована: Фев. 28, 2025
Язык: Английский
Tunable wave couplings induced by transverse properties of elastic valley topological edge states
Physical Review Applied,
Год журнала:
2025,
Номер
23(4)
Опубликована: Апрель 25, 2025
Язык: Английский
Modeling and analysis of gradient metamaterials for broad fusion bandgaps
Applied Mathematics and Mechanics,
Год журнала:
2024,
Номер
45(7), С. 1155 - 1170
Опубликована: Июль 1, 2024
Abstract
A
gradient
metamaterial
with
varying-stiffness
local
resonators
is
proposed
to
open
the
multiple
bandgaps
and
further
form
a
broad
fusion
bandgap.
First,
three
linearly
increasing
stiffness
are
periodically
attached
spring-mass
chain
construct
metamaterial.
The
dispersion
relation
then
derived
based
on
Bloch’s
theorem
reveal
bandgap
theoretically.
dynamic
characteristic
of
finite
investigated
validate
bandgaps.
Finally,
effects
design
parameters
discussed.
results
show
that
non-uniform
pattern
capable
opening
effectively
attenuating
longitudinal
waves
within
frequency
region.
Язык: Английский
Embodiment of parallelizable mechanical logic utilizing multimodal higher-order topological states
International Journal of Mechanical Sciences,
Год журнала:
2024,
Номер
284, С. 109697 - 109697
Опубликована: Сен. 6, 2024
Embodiment of Frequency-Selective and Parallelizable Mechanical Logic in Metamaterials Utilizing Multimodal Higher-Order Topological States
Опубликована: Янв. 1, 2024
Язык: Английский
Refraction of flexural wave in the valley topological interface
Physica Scripta,
Год журнала:
2024,
Номер
99(11), С. 115984 - 115984
Опубликована: Окт. 15, 2024
Abstract
The
transport
behavior
of
valley
kink
states
has
attracted
significant
research
interest
due
to
its
potential
prospects
in
energy
harvesting,
vibration
mitigation,
and
elastic
wave
imaging.
In
this
work,
we
extensively
investigate
the
topological
refraction
insulators
(TIs)
when
edge
(TES)
from
interface
termination
into
bare
plate.
We
show
that
pattern
(negative
or
positive
refraction)
depends
on
type
valleys
which
state
is
projected,
angles
can
be
tuned
by
Dirac
frequency.
Thus,
realize
conversion
refracted
evanescent
wave,
resulting
no
beams
plate,
provides
a
new
perspective
for
isolation
mitigation.
then
construct
layered
TI
alternately
arranging
two
unit
cells
with
opposite
phases.
dispersion
relation
shows
negative
band
bulk
gap,
corresponding
different
modes.
states,
would
transfer
toward
(positive)
direction
vector
along
an
incident
couples
TI,
shift
parallel
interface.
selectively
achieve
exciting
only
one
desired
mode.
particular,
presence
impedance
mismatch
between
TIs
plate
leads
relatively
low
amplitude
beam.
Our
results
provide
insights
manipulating
plates
facilitate
applications
beam
splitting,
images.
Язык: Английский