Architected
latticed
structural
systems,
known
as
metamaterials
or
metastructures,
have
recently
garnered
significant
attention
due
to
their
superior
performance
under
various
loading
conditions.
This
class
includes
exhibiting
multistability,
characterized
by
negative
stiffness,
which
enables
energy
entrapment
during
transitions
between
equilibrium
states,
making
them
suitable
for
applications
such
lightweight
protective
systems.
In
this
study,
in
three
folds,
we
investigate
the
mechanical
of
a
stiffness
honeycomb
metamaterial
(NSHM)
with
unit
cells
composed
curved
double
beams.
First,
quasi-static
compressive
response
is
numerically
examined
using
finite
element
method,
revealing
that
independent
number
cells.
Next,
analyze
transient
dynamic
both
mono-material
NSHMs
and
bi-material
composites,
where
stiffeners
are
replaced
brittle
polystyrene,
localized
striker
uniform
plate
impacts.
Finally,
present
an
analytical
model
total
potential
energy,
solutions
obtained
through
optimization
technique,
validate
these
results
against
numerical
simulations.
Through
analyses,
study
effects
several
parameters
influencing
multistability.
Our
findings
demonstrate
bistability
ratio
significantly
impacts
overall
honeycomb,
desired
can
be
achieved
high
ratios.
Additionally,
contact
force
peaks
resulting
from
impact
found
constituent
elements.
The
optimized
geometry
lattice
determined
trade-off
porosity
thicker
cell
walls.
Applied Sciences,
Год журнала:
2025,
Номер
15(6), С. 3024 - 3024
Опубликована: Март 11, 2025
The
double
crystal
monochromator
(DCM)
is
a
spectrometer
in
synchrotron
radiation
beamlines,
and
its
stability
directly
impacts
the
quality
of
emitted
light.
In
order
to
meet
requirements
fourth
generation
light
sources,
researchers
have
designed
DCM
using
an
active
control
method
ensure
by
actively
compensating
for
displacement
through
voice
coil
motors.
imposes
high
demands
on
vibration
isolation
performance
frame.
response
external
excitation
characteristics,
this
paper
proposes
quasi-zero
stiffness
(QZS)
system
based
compressed
buckling
beam
structure.
Random
simulations
finite
element
analysis
revealed
that,
under
different
operating
conditions,
3σ
core
part
maintained
at
nanometer
level.
Moreover,
presents
calculation
elastic
potential
energy
establish
force
equilibrium
equations
negative
analyzes
stress
distribution
during
derived
deflection
curve.
Validation
confirms
method’s
accuracy
calculating
distribution.
Because
structural
similarities,
some
results
can
be
applied
study
honeycomb
materials.
Applied Sciences,
Год журнала:
2025,
Номер
15(7), С. 3478 - 3478
Опубликована: Март 22, 2025
With
the
rapid
development
of
precision
instruments,
aerospace,
and
automotive
industries,
demand
for
compact
vibration
isolators
capable
suppressing
low-frequency
vibrations
has
surged.
Although
prior
reviews
have
established
theoretical
framework
quasi-zero
stiffness
(QZS)
isolators,
critical
gaps
persist
in
addressing
their
design
under
strong
nonlinear
dynamics
diverse
engineering
constraints.
This
review
systematically
analyzes
dynamic
characteristics
QZS
systems
effects
evaluates
five
innovative
methodologies
isolators:
special
spring
type,
magnetic
bionic
metamaterials-based
origami-inspired
type.
Key
findings
reveal
that
spring-type
are
simple
to
space-efficient
but
difficult
machine.
Magnetic-type
achieve
ultra-low
start-up
frequencies
face
thermal
instability.
Metamaterial
designs
enable
multifunctional
integration
at
cost
manufacturing
complexity,
while
bionic-inspired
abstract
practical
applications.
We
find
current
research
tends
prioritize
miniaturization
over
synergistic
optimization
load
capacity,
broadband
isolation,
adaptability.
Future
should
focus
on
multi-degree-of-freedom
systems,
coupled
metamaterials-bionic
structures,
active
control.
work
provides
a
key
roadmap
advancing
technology
space-constrained
