Mathematics and Mechanics of Solids,
Год журнала:
2024,
Номер
29(5), С. 881 - 903
Опубликована: Янв. 23, 2024
We
propose
a
topology
optimisation
approach
that
can
effectively
account
for
the
size
effect
of
periodic
composite
plates
to
determine
optimal
material
distribution
achieving
largest
bandgap
width.
The
is
based
on
modified
couple
stress
continuum
and
uses
relative
width
as
objective
function,
with
volume
constraints
defined
constraint
function.
properties
are
represented
by
solid
isotropic
penalisation
(SIMP)
interpolation
model,
optimality
criteria
(OC)
algorithm
employed
update
design
variables.
To
address
significant
microplate
structure,
we
use
model
dynamic
behaviour
unit
cell.
Melosh–Zienkiewicz–Cheung
(MZC)
finite
element
ensure
nodal
[Formula:
see
text]
continuity
achieve
high-order
elasticity
respect
inter-element
continuity.
Our
results
demonstrate
proposed
methodology
capable
designing
cell
configurations
significantly
improve
also
investigate
impact
thickness
limitations
optimised
configuration.
obtained
suggest
framework
promising
geometries
effect.
Applied Sciences,
Год журнала:
2023,
Номер
13(13), С. 7742 - 7742
Опубликована: Июнь 30, 2023
The
realm
of
sustainable
technologies
and
metamaterials
represents
a
vibrant
field
inquiry,
and,
upon
closer
examination,
fascinating
correlation
emerges.
Metamaterials,
being
artificially
engineered
substances,
exhibit
diverse
characteristics,
depending
on
their
specific
composition.
Remarkably,
they
hold
immense
potential
in
various
sustainability-driven
applications,
such
as
energy
harvesting,
purification,
noise
control.
For
instance,
straightforward
approach
involves
the
implementation
electromagnetic
metamaterial
absorbers
harvesting
systems.
As
scope
environmental
concerns
continues
to
expand,
this
proposed
solution
demonstrates
its
universal
applicability,
addressing
growing
number
challenges.
International Journal of Mechanical Sciences,
Год журнала:
2024,
Номер
282, С. 109591 - 109591
Опубликована: Июль 27, 2024
Metamaterials
are
capable
of
attenuating
undesired
mechanical
vibrations
within
a
narrow
band-gap
frequency
range;
however,
real-world
applications
often
require
adjustments
due
to
varying
loads
and
content.
This
study
introduces
self-aware,
thermo-active
metamaterial,
3D-printed
in
single
process
using
thermoplastic
material
extrusion.
The
adjustment
the
natural
region
is
achieved
through
resistive
heating
conductive
paths,
which
alters
stiffness
base
cell's
resonator.
Additionally,
these
paths
facilitate
detection
resonator's
excitation
temperature,
thereby
eliminating
need
for
external
sensors.
dynamic
adaptability,
experimentally
demonstrated
by
achieving
tuning
range
from
505
Hz
445
with
17
°C
temperature
difference,
highlights
potential
metamaterials
smart
structures
across
aerospace,
civil,
automotive
industries.
Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences,
Год журнала:
2024,
Номер
382(2279)
Опубликована: Авг. 12, 2024
The
introduction
of
metamaterials
has
provided
new
possibilities
to
manipulate
the
propagation
waves
in
different
fields
physics,
ranging
from
electromagnetism
acoustics.
However,
despite
variety
configurations
proposed
so
far,
most
solutions
lack
dynamic
tunability,
i.e.
their
functionality
cannot
be
altered
post-fabrication.
Our
work
overcomes
this
limitation
by
employing
a
photo-responsive
polymer
fabricate
simple
metamaterial
structure
and
enable
tuning
its
elastic
properties
using
visible
light.
consists
graded
resonators
form
an
array
pillars,
each
giving
rise
resonances
transmission
band
gaps.
Selective
laser
illumination
can
then
tune
frequencies
individually
or
collectively,
thus
yielding
many
degrees
freedom
tunability
filtered
transmitted
wave
frequencies,
similar
playing
keyboard,
where
illuminating
pillar
corresponds
note.
This
concept
used
realize
low-power
active
devices
for
control,
including
beam
splitters,
switches
filters.
article
is
part
theme
issue
‘Current
developments
acoustic
science
(Part
2)’.
Acta Acustica,
Год журнала:
2025,
Номер
9, С. 24 - 24
Опубликована: Янв. 1, 2025
Since
World
War
II,
there
have
been
many
efforts
worldwide
to
design
hull
coatings
for
naval
and
underwater
defense
applications
in
order
reduce
either
noise
radiated
from
the
(discretion)
or
acoustic
reflection
(stealth).
This
paper
presents
a
non-exhaustive
review
of
concepts
that
emerged
since
iconic
Alberich
coating
highlights
new
trends
promising
candidates,
such
as
metamaterials,
improve
discretion
stealth
performance
systems.
The
need
materials
is
first
explained,
along
with
some
specific
requirements
coatings.
Two
technologies,
called
micro-inclusion
macro-inclusion
coatings,
are
then
successively
reviewed.
New
also
presented
following
section.
concludes
by
introducing
frame
threats
industries
well
other
non-naval
areas,
opening
possibilities
their
design.
