Polymers,
Год журнала:
2024,
Номер
16(22), С. 3192 - 3192
Опубликована: Ноя. 17, 2024
Self-oscillation
is
the
phenomenon
in
which
a
system
generates
spontaneous,
consistent
periodic
motion
response
to
steady
external
stimulus,
making
it
highly
suitable
for
applications
soft
robotics,
motors,
and
mechatronic
devices.
In
this
paper,
we
present
self-oscillator
based
on
liquid
crystal
elastomer
(LCE)
fiber
under
constant
voltage.
The
primarily
consists
of
an
LCE-liquid
metal
(LCE-LM)
composite
fiber,
mass
sphere,
straight
rod
featuring
both
conductive
insulating
segments.
Building
upon
established
dynamic
LCE
model,
derive
governing
equations.
Numerical
calculations
reveal
two
distinct
regimes:
static
regime
self-oscillation
regime.
Furthermore,
provide
temporal
behavior
curves
electrothermal-induced
contraction
tensile
force,
phase
trajectories
variation
equivalent
driving
force
damping
force.
These
detailed
studies
elucidate
that
results
from
electrothermal-responsive
LCE-LM
when
circuit
activated,
with
continuous
being
sustained
through
interplay
between
sphere
self-controlled
circuit.
We
also
investigate
threshold
conditions
necessary
initiating
self-oscillation,
as
well
key
parameters
influence
its
frequency
amplitude.
Our
demonstrates
improved
stability
by
reducing
effects
gravity
other
disturbances.
Additionally,
curved
trajectory
can
be
achieved
replacing
one,
resulting
more
flexible
easily
controllable
structure.
Given
these
characteristics,
may
ideal
creating
monitoring
warning
devices,
systems,
integrating
actuators
controllers.
Physical review. E,
Год журнала:
2025,
Номер
111(1)
Опубликована: Янв. 15, 2025
Traditional
liquid
crystal
elastomer
(LCE)-based
machines
are
constrained
by
the
need
for
complex
controllers
and
large
power
supplies,
which
limits
their
applicability
in
microrobots
other
small-scale
machines.
In
this
paper,
we
propose
a
light-powered
self-scrolling
LCE
crane,
is
capable
of
to
lift
weights
under
steady
light.
Based
on
dynamic
model,
derive
lateral
curvature
crane
driving
moment
scrolling.
By
numerically
solving
equilibrium
equations,
found
that
originated
from
uneven
distribution
rod
horizontal
direction
caused
The
angular
velocity
depends
five
system
parameters:
heat
flux,
coefficient
transfer,
support
spacing,
weight
mass,
scrolling
friction
coefficient.
Through
experimental
comparative
analysis,
results
consistent
with
numerical
simulation.
device
proposed
paper
features
simple
structure,
illumination,
compact
light
irradiation
area.
It
advances
understanding
self-sustaining
structures
utilizing
active
materials
offers
valuable
insight
into
potential
applications
light-responsive
LCEs
self-driven
devices,
medical
instruments,
robotics,
sensors,
energy
sector.
locked
icon
Physics
Subject
Headings
(PhySH)Continuum
mechanicsDevicesElastic
deformation
Advanced Engineering Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
Self‐oscillating
systems
based
on
active
materials
offer
significant
potential
for
creating
autonomous
intelligent
machines
by
harnessing
environmental
energy
and
enabling
self‐regulation.
However,
most
such
overlook
the
viscoelastic
behavior
of
materials,
which
exhibit
both
elastic
viscous
deformation
under
load,
underscoring
importance
studying
these
effects
system
performance.
Herein,
a
liquid
crystal
elastomer
(LCE)
spring
oscillator
is
presented
its
dynamic
behaviors
are
investigated.
The
governing
equations
developed
linear
thermoviscoelastic
model.
analysis
concludes
that
has
supercritical
Hopf
bifurcation
between
static
mode
self‐oscillation
mode.
Exact
expressions
amplitude
frequency,
along
with
asymptotic
analytic
solutions,
also
provided.
Additionally,
key
parameters
influencing
frequency
self‐oscillating
examined.
Especially,
viscoelasticity
LCE
fiber
greatly
affects
point,
amplitude,
period
oscillator.
These
results
provide
convenience
guidance
various
applications,
especially
in
related
fields
as
soft
robotics,
micromechanical
systems,
harvesters.
