A
novel
integrated
composite
laminate
(ICL)
with
embedded
macro-fiber
composites
(MFCs)
is
proposed
to
improve
the
vibration
reduction
performance
of
thin-walled
structures.
Its
dynamic
modeling
and
active
suppression
are
investigated.
The
structure
can
not
only
achieve
good
but
also
provide
protection
for
MFCs,
while
related
experimental
studies
rarely
reported
in
published
works.
This
paper
proposes
a
general
method
ICL
MFCs.
Considering
piezoelectric
effect
MFC
material,
semi-analytical
model
established
by
combining
first-order
shear
deformation
theory
Lagrange
equation.
On
this
basis,
state-space
equation
control
calculation
design
Proportional-Integral-Derivative
(PID)
controller
given.
Furthermore,
preparation
specimen
MFCs
introduced,
an
system
capable
testing
built.
comparative
results
simulations
experiments
demonstrate
accuracy
approach
effectiveness
capability
structure.
Finally,
effects
fiber
distribution
angle
on
structural
modal
characteristics
damping
investigated,
influence
laws
skin
plate
thickness
PID
parameters
revealed.
findings
new
technical
Highly
loaded
rotor
systems,
such
as
those
in
aero-engines,
exhibit
complex
vibration
behaviors
due
to
the
discontinuities
bolted
structure,
which
generate
friction
at
connection
interfaces.
This
leads
nonlinear
dynamics
for
system.
A
dynamic
model
of
system
is
established
using
finite
element
theoretical
Methods,
incorporating
connections
around
entire
circumference.
The
procedure
assessing
stick-slip
states
bolts
different
positions
during
motion
provided.
study
examines
phenomenon
interface
under
various
conditions,
including
preload
values,
rotational
speeds,
bolt
numbers,
and
coefficients.
Trends
equivalent
stiffness
energy
dissipation
these
conditions
are
analyzed.
Additionally,
critical
force
each
stage
speeds
discussed.
region
viscous-slip-shear
state
also
presented.
research
introduces
a
modeling
approach
understanding
characteristics
systems
operating
viscous-slip
regime
their
It
provides
an
analytical
that
serves
foundation
design
calculation
interfaces
engineering
applications.
Polymers for Advanced Technologies,
Год журнала:
2023,
Номер
34(12), С. 3748 - 3758
Опубликована: Авг. 27, 2023
Abstract
The
exceptional
mechanical
properties
of
aramid
fibers
make
them
a
popular
choice
for
high‐performance
materials;
despite
that,
their
potential
is
limited
due
to
surface
bonding
energy
and
interfacial
strength
with
matrix
materials.
enhanced
resistance
poly‐aramid
(AFs)
severe
surroundings
improved
interlaminar
adhesion
in
sandwich
compounds
admirable
characteristics
are
becoming
great
challenge
various
chemical
physical
treatment
techniques.
Supercritical
carbon
dioxide
(scCO
2
)
sustainable
approach
that
can
effectively
bond
homogeneously
deposit
functional
groups
or
nanoparticles
exhibit
the
excellent
performance
fibber
modification.
This
article
examines
fibers'
modification
advancements
using
scCO
‐assisted
techniques,
including
monomer
grafting,
impregnation,
functionalization
nanoparticles.
Additionally,
discusses
challenges
faced
fiber
what
future
holds
this
technology.
Studies
on
active
vibration
suppression
and
analysis
of
integrated
composite
sandwich
plates
(ICSPs)
embedded
macro-fiber
composites
(MFC)
have
been
rarely
studied
in
previous
papers,
especially
with
incompletely
constrained
boundaries
irregular
geometric
shapes.
This
paper
aims
to
provide
a
new
structural
design
for
thin-walled
structures
such
as
aircraft
wings
improve
the
anti-vibration
performance
study
influence
modal
damping
characteristics
structures.
The
dynamic
model
ICSPs
considering
piezoelectric
effect
is
established
based
first-order
shear
deformation
theory
(FSDT)
Lagrange
equation.
influences
shapes
incomplete
constraint
are
introduced
into
through
coordinate
mapping
artificial
spring
technology.
test
pieces
ICSP
prepared,
experimental
system
which
can
be
used
testing
control,
established.
On
this
basis,
accuracy
proposed
modeling
method
reduction
verified
by
combining
finite
element
results.
Moreover,
frequency
veering
behavior
caused
change
position
segment
analyzed,
some
interesting
phenomena
length
revealed.
boundary
conditions
control
parameters
discussed.
Some
research
results
helpful
reference
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