Mechanics of Advanced Materials and Structures,
Journal Year:
2024,
Volume and Issue:
32(1), P. 107 - 123
Published: April 18, 2024
In
this
study,
the
stability
and
vibration
analyses
of
a
spinning
smart
nanotube
under
electrical
loads
are
examined
for
first
time.
The
structure
is
made
from
single-walled
zinc
oxide
(SWZnONT)
due
to
its
extraordinary
piezoelectric
magnetic
properties,
which
have
great
potential
use
as
rotating
component
in
nanoelectromechanical
systems
(NEMS).
To
achieve
aim,
nonlocal
strain
gradient
theory
Maxwell's
electrostatic
equations
used
capture
structure's
small-scale
effects,
respectively.
addition,
nanotube's
structural
model
based
on
Euler–Bernoulli
beam
theory,
deriving
governing
boundary
conditions
via
Hamilton
principle.
A
technique
employing
Galerkin-based
closed-form
solutions
utilized
solve
motion
get
response
nanotube.
Finally,
effects
material
length
scale,
parameter,
speed,
external
voltage,
natural
frequency
critical
rotational
speed
investigated.
study
results
indicate
that
applying
an
voltage
SWZnONT
effectively
adjusts
enhances
stability.
Journal of Sandwich Structures & Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 28, 2025
This
research
explores
the
free
vibration
characteristics,
both
in-plane
and
transverse,
of
a
circular
plate
made
from
functionally
graded
graphene
origami-enabled
auxetic
metamaterial
(GOEAM).
An
AI-assisted
model
is
utilized
to
calculate
micromechanical
properties
metamaterial.
Three-dimensional
linear
elasticity
theory
formulate
constitutive
relations
equations
motion
plate.
By
using
two
pairs
transformation
functions,
these
are
transformed
into
couple
independent
state-space
corresponding
three-dimensional
Graphene
origami
(GOri)
platelets
distributed
with
four
different
dispersion
patterns
along
thickness.
Also,
folding
degree
GOri
can
vary.
Two
boundary
condition
types
considered:
elastic
simple
rigidly
slipping.
State-space
solved
through
transfer
matrix
approach,
frequency
obtained
for
out-of-plane
vibrations.
The
effects
various
parameters
on
frequencies
GOEAM
explored.
findings
indicate
that
incorporating
highly
folded
enhances
stiffness,
more
noticeable
impact
Distinct
demonstrate
peak
natural
transverse
Although
vibrations
show
declining
trend,
initially
strengthens
structure,
resulting
in
higher
before
reaching
maximum.
