Polymers,
Год журнала:
2024,
Номер
16(16), С. 2375 - 2375
Опубликована: Авг. 22, 2024
In
this
paper,
we
propose
an
innovative
light-powered
LCE-slider
system
that
enables
continuous
self-circling
on
elliptical
track
and
is
comprised
of
a
LCE
string,
slider,
rigid
track.
By
formulating
solving
dimensionless
dynamic
equations,
explain
static
states,
emphasizing
dynamics
energy
balance.
Quantitative
analysis
reveals
the
frequency
systems
independent
initial
tangential
velocity
but
sensitive
to
light
intensity,
contraction
coefficients,
elastic
axis
ratio,
damping
coefficients.
Notably,
motion
outperforms
circular
in
angular
frequency,
indicating
greater
efficiency.
Reliable
under
constant
suggests
applications
periodic
fields,
especially
celestial
mechanics.
Additionally,
system’s
remarkable
adaptability
wide
range
curved
trajectories
exemplifies
its
flexibility
versatility,
while
absorption
conversion
capabilities
position
it
as
highly
potential
candidate
for
robotics,
construction,
transportation.
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.
Polymers,
Год журнала:
2025,
Номер
17(4), С. 436 - 436
Опубликована: Фев. 7, 2025
Self-excited
systems
rely
on
stable
external
stimuli
to
initiate
and
sustain
oscillations
via
internal
processes.
However,
these
can
compromise
system
stability
increase
friction,
limiting
their
practical
applications.
To
overcome
this
issue,
we
propose
the
light-fueled
self-rolling
of
a
liquid
crystal
elastomer
(LCE)-based
wheel.
A
photothermal
response
model
based
an
LCE
was
used
analyze
temperature
distribution
within
rods.
The
driving
torque
for
is
generated
by
contraction
resulting
from
LCE's
response,
which
displaces
wheel's
center
mass.
We
then
derived
equilibrium
equations
identified
critical
conditions
achieving
motion.
Through
interaction
between
field
torque,
wheel
achieves
continuous
absorbing
thermal
energy
counteract
damping
dissipation.
Numerical
simulations
revealed
that
velocity
influenced
several
key
parameters,
including
heat
flux,
coefficient,
gravitational
acceleration,
initial
rolling
coefficient.
proposed
LCE-based
enhances
significantly
reduces
frictional
losses.
These
characteristics
make
it
promising
candidate
applications
in
autonomous
drive
systems,
micro-transportation
devices,
conversion
technologies.
Polymers,
Год журнала:
2025,
Номер
17(5), С. 617 - 617
Опубликована: Фев. 25, 2025
The
reliance
of
feedback
mechanisms
in
conventional
light-fueled
self-oscillating
systems
on
spatially
distributed
light
and
intricately
designed
structures
impedes
their
application
development
micro-robots,
miniature
actuators,
other
small-scale
devices.
This
paper
presents
a
straightforward
rheostat
mechanism
to
create
an
electrically
driven
liquid
crystal
elastomer
(LCE)
self-oscillator
which
comprises
LCE
fiber,
rheostat,
spring,
mass.
Based
the
electrothermally
responsive
model,
we
first
derive
governing
equation
for
system's
dynamics
subsequently
formulate
asymptotic
equation.
Numerical
calculations
reveal
two
motion
phases,
i.e.,
static
self-oscillating,
elucidate
behind
self-oscillation.
By
employing
multi-scale
method,
identify
Hopf
bifurcation
establish
analytical
solutions
amplitude
frequency.
influence
various
system
parameters
frequency
self-oscillation
was
analyzed,
with
numerical
being
validated
against
results
ensure
consistency.
proposed
can
be
extended
cases
rheostats
that
have
more
general
resistance
properties
offers
advantages
such
as
simple
design,
adjustable
dimensions,
rapid
operation.
findings
are
expected
inspire
broader
design
concepts
applications
soft
robotics,
sensors,
adaptive
structures.
Polymers,
Год журнала:
2025,
Номер
17(6), С. 711 - 711
Опубликована: Март 7, 2025
Conventional
machines
often
face
limitations
due
to
complex
controllers
and
bulky
power
supplies,
which
can
hinder
their
reliability
operability.
In
contrast,
self-excited
movements
harness
energy
from
a
stable
environment
for
self-regulation.
this
study,
we
present
novel
model
of
self-rowing
boat
inspired
by
paddle
boats.
This
is
powered
liquid
crystal
elastomer
(LCE)
turntable
that
acts
as
motor
operates
under
consistent
illumination.
We
investigated
the
dynamic
behavior
uniform
illumination
integrating
photothermal
reaction
theory
LCEs
with
nonlinear
framework.
The
primary
equations
were
solved
using
fourth-order
Runge–Kutta
method.
Our
findings
reveal
exhibits
two
modes
motion
steady
illumination:
static
pattern
pattern.
transition
between
these
influenced
interaction
driving
friction
torques
generated
energy.
study
quantitatively
analyzes
fundamental
conditions
necessary
initiating
examines
how
various
dimensionless
parameters
affect
speed
system.
proposed
system
offers
several
unique
advantages,
including
simple
structure,
easy
control,
independence
electronic
components.
Furthermore,
it
has
potential
miniaturization
integration,
enhancing
its
applicability
in
miniature
systems.
Polymers,
Год журнала:
2024,
Номер
16(16), С. 2263 - 2263
Опубликована: Авг. 9, 2024
The
self-excited
oscillation
system,
owing
to
its
capability
of
harvesting
environmental
energy,
exhibits
immense
potential
in
diverse
fields,
such
as
micromachines,
biomedicine,
communications,
and
construction,
with
adaptability,
efficiency,
sustainability
being
highly
regarded.
Despite
the
current
interest
track
sliders
self-vibrating
systems,
LCE
fiber-propelled
face
significant
limitations
two-dime
nsional
movement,
especially
self-rotation,
necessitating
development
more
flexible
mobile
designs.
In
this
paper,
we
design
a
spatial
slider
system
which
ensures
self-rotation
propelled
by
light-fueled
fiber
on
rigid
circular
track.
A
nonlinear
dynamic
model
is
introduced
analyze
system’s
behaviors.
numerical
simulations
reveal
smooth
transition
from
static
self-rotating
states,
supported
ambient
illumination.
Quantitative
analysis
shows
that
increased
light
intensity,
contraction
coefficient,
elastic
coefficient
enhance
frequency,
while
damping
decreases
it.
radius
non-monotonic
effect.
initial
tangential
velocity
has
no
impact.
reliable
performance
under
steady
suggests
applications
periodic
motion-demanding
construction
industry
where
energy
dissipation
utilization
are
utmost
urgency.
Furthermore,
possesses
ability
rotate
self-vibrate,
it
capable
adapted
other
non-circular
curved
tracks,
thereby
highlighting
flexibility
multi-use
capabilities.
