Electromechanical coupling induced multiple excitation mechanisms in conical dielectric elastomer resonators
Journal of Applied Physics,
Год журнала:
2025,
Номер
137(9)
Опубликована: Март 4, 2025
Resonant
actuation
of
the
dielectric
elastomer
resonators
(DERs)
allows
them
to
achieve
outstanding
output
performance
comparable
biological
muscles
and
facilitates
numerous
applications
DERs
in
robotics.
However,
electromechanical
coupling
mechanism
introduces
complicated
nonlinear
correlations
between
input
signals,
system
states,
excitation
forces
at
resonances,
which
are
overlooked
previous
studies.
In
this
paper,
we
adopt
a
conical
DER
(CDER)
configuration,
by
decomposing
term
dynamic
system,
reveal
that
resonances
excited
both
externally
parametrically
two
frequencies.
The
forcing
mechanisms
include
four
components:
external
components
with
frequencies
1:1
2:1
frequency
(fe_ext1
fe_ext2,
respectively)
parametric
(fe_par1
fe_par2,
respectively).
Using
an
energy
balance
approach,
theoretically
investigate
contributions
these
CDER.
We
show
primary
resonance
is
mainly
fe_ext1
super-harmonic
subharmonic
fe_par1.
strengths
strongly
influenced
out-of-plane
deformation
membrane
ratios
voltage
components.
Power
studies
suggest
heavily
affected
damping,
while
good
robustness
against
increasing
payload.
Язык: Английский
Mechanism-based and data-driven approach to developing the constitutive model of viscoelastic elastomers
Mechanics of Materials,
Год журнала:
2024,
Номер
unknown, С. 105181 - 105181
Опубликована: Окт. 1, 2024
Язык: Английский
Compressible dielectric elastomer actuators in high hydrostatic pressures: Models and experiments
Physical review. E,
Год журнала:
2024,
Номер
110(5)
Опубликована: Ноя. 4, 2024
Dielectric
elastomer
actuators
(DEAs)
are
an
emerging
type
of
soft
based
on
intelligent
electroactive
polymers.
Compared
with
conventional
rigid
actuators,
DEAs
can
adapt
to
extreme
hydrostatic
pressures
without
any
bulky
protective
vessels
and,
therefore,
have
demonstrated
great
promises
in
high-hydrostatic
pressure
applications
such
as
deep-sea
explorations.
However,
the
effects
enormous
compressions
mechanical
and
electromechanical
coupling
properties
electrical
breakdown
strengths
remain
unclear
due
restrictions
existing
theoretical
models
limitations
experimental
techniques
developed
for
DEAs.
To
bridge
these
gaps,
this
paper
develops
a
pressure-coupled
DEA
model
introduces
series
characterization
accurately
quantifying
introduced
by
pressures.
A
wide
range
up
105
MPa
(close
Mariana
Trench)
investigated
its
stiffening
elastomer,
reduction
actuation
strain,
increase
electric
field
reported
both
experiments
models.
The
contributions
offer
guidelines
characterizing
performances
under
designing
next-generation
robotic
systems
applications.
Язык: Английский
Mechanics of Surface Instabilities in Soft Dielectrics Subject to Electromechanical Loading
Polymers,
Год журнала:
2024,
Номер
16(24), С. 3612 - 3612
Опубликована: Дек. 23, 2024
As
a
category
of
polymeric
materials,
soft
dielectrics,
such
as
most
elastomers
and
rubber-like
have
shown
great
potential
for
extensive
applications
in
various
fields.
Owing
to
their
intriguing
electromechanical
coupling
behaviors,
the
morphological
instabilities
dielectrics
been
an
active
research
field
recent
years.
In
this
work,
progress
experimental
theoretical
on
is
reviewed,
especially
regarding
aspect.
First,
we
revisit
framework
electroelasticity
dielectrics.
Then,
typical
configurations
dielectric
membranes
used
generate
two
types
surface
instabilities,
namely
wrinkles
creases,
are
introduced.
Three
commonly
modeling
approaches
(i.e.,
stress
balance
method,
incremental
energy
method)
reviewed
with
specific
examples.
Moreover,
discussions
difference
between
these
methods
corresponding
critical
loading
conditions
presented.
Furthermore,
review
also
covers
relation
transition
wrinkling
creasing
phenomena.
Язык: Английский