Polymer Composites,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 14, 2024
Abstract
In
this
paper,
the
thermomechanical
buckling
and
vibration
analysis
are
investigated
for
carbon
nanotube‐reinforced
composite
sandwich
doubly
curved
shells
(CNCSDS)
under
action
of
both
thermal
loads
in‐plane
compressive
loads.
Based
on
von‐Karman
non‐linear
kinematic
relations,
First
Order
Shear
Theory,
Hamilton's
principle,
stability
equations
CNCSDS
deduced.
For
obtaining
critical
load
frequency,
an
exact
method
is
adopted.
Subsequently,
results
validated
by
comparing
with
finding
in
published
literature
simulation
results.
At
last,
influence
system
parameters
frequency
studied
displayed
graphically.
Meanwhile,
some
new
about
proposed
first
time.
Highlights
Thermomechanical
was
studied.
Vibration
The
change
rules
were
obtained.
Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 23, 2025
Since
nanocomposites
have
recently
been
used
in
a
wide
range
of
industries,
scientists
are
becoming
increasingly
interested
simulating
these
kinds
materials.
Engineers
outcomes
that
match
simulations
nanocomposites.
Examining
the
impact
nanoparticle
aggregation
computations
is
one
step
accurately
modeling
reinforced
nanocomposite.
With
regard
to
size-dependent
continuum
modeling,
this
work
aims
evaluate
dynamic
behavior
small-scaled
composites
with
carbon
nanotubes
(CNTs)
light
CNT
aggregations.
In
simulation
nanotube-reinforced
micro-
or
nanocomposite,
taking
into
account
more
length
scale
parameters—which
typically
thought
constant
value—is
crucial.
This
innovative
it
examines
how
affects
nanocomposite
structure
while
considering
variable
parameter.
We
address
and
solve
an
example
using
modified
couple
stress
theory
(MCST).
The
effectiveness
employing
parameter
(LSP)
MCST
confirmed
by
conducting
comparison
between
proposed
strategy
experimental
molecular
(MD)
results.
A
curved
microbeam
examined
for
problem,
alterations
agglomeration
parameters
investigated
detail.
ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik,
Journal Year:
2024,
Volume and Issue:
104(11)
Published: Sept. 22, 2024
Abstract
The
transference
of
the
surface
seismic
wave
at
loosely
bonded
common
interface
a
visco‐piezo
composite
structure
is
examined
in
current
work.
With
flexoelectric
effect
taken
into
account,
composed
viscoelastic
layer
embedded
on
piezoelectric
substrate.
shear
stiffness
upper
thought
to
be
described
by
Kelvin–Voigt
model.
An
analytical
separable
variable
method
used
derive
complex
dispersion
relation
for
both
electrically
open
and
short
circuit
scenarios.
A
numerical
example
presented
demonstrate
significant
influence
several
influencing
parameters
wave's
phase
velocities
attenuation
coefficients.
Additionally,
graphic
comparison
three
rheological
models
–
Maxwell,
Newton
covered.
Results
indicate
that
curve
pertaining
Maxwell
model
lowest
than
Some
major
outcomes
are
highlighted
here
as:
prominent
bonding
parameter
well‐proportional
velocity
inversely
proportional
coefficient,
flexoelectricity
has
an
intensive
impact
coefficient
curves.
This
theoretical
study
leads
understanding
piezo‐flexo
coupling
its
potential
application
design
sensors,
actuators,
energy
harvesters
nano‐electronics.
Waves in Random and Complex Media,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 39
Published: June 27, 2024
Shallow
spherical
caps
are
commonly
encountered
in
the
design
of
spacecraft
components,
such
as
fuel
tanks
or
structural
elements.
Understanding
dynamic
behavior
can
contribute
to
identification
potential
failure
modes.
The
modulus
elasticity
augmented
composite
upper
layer
is
obtained
using
model
Halpin–Tsai,
and
this
with
graphene
platelets
(GPLs).
Also,
GPLs'
volume
fraction
from
top
considered
for
different
cases
GPLs.
bottom
assumed
functionally
graded
(FG)
two
kinds,
type
A:
FG
layers
homogeneous
core,
B:
core
layers.
To
approximate
displacement
field,
new
hyperbolic
tangent
shear
deformation
theory
(HTSDT)
has
been
used
which
no
need
modification
coefficients.
By
adopting
Hamilton's
principle,
equations
motion
solved
by
discrete
differential
quadrature
method
(DQM)
well
Newmark's
time
marching
scheme
implementing
famous
Newton–Raphson
iterative
technique.
When
index
infinite,
it
observed
that
point
maximum
decreases
12.5%,
critical
load
increases
about
23%
compared
case
where
zero.
Ain Shams Engineering Journal,
Journal Year:
2024,
Volume and Issue:
15(5), P. 102640 - 102640
Published: Jan. 25, 2024
In
the
present
paper,
combination
of
mixed
interpolation
tensorial
components
technique
triangular
elements
(MITC3)
based
upon
first-order
shear
deformation
theory
(FSDT)
is
developed
to
research
free
and
forced
vibration
unsymmetrical
functionally
graded
porous
(UFGP)
folded
sandwich
plates.
The
MITC3
element
still
uses
mesh
avoids
shear-locking
phenomena
that
occur
when
using
classical
elements.
Based
on
basic
formula
for
analyzing
plates,
twisted
angle
(φz)
added
node
displacement
vector
solve
Material
properties
plates
are
unsymmetric
with
an
FGP
core
layer,
a
metal
bottom
ceramic
top
layer.
motion
equations
UFGP
derived
from
Hamilton's
principle.
Some
examples
conducted
verify
accuracy
reliability
method.
Then,
new
numerical
results
vibrations
provided.
Journal of Engineering Research,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 1, 2024
Shape
memory
alloy
(SMA)
has
excellent
damping
properties
and
super
elasticity,
can
be
used
as
vibration
energy
absorbing
materials
for
structures.
Through
the
study
of
boundary
conditions
four
side
fixation,
opposite
adjacent
fixation
one
sinusoidal
scanning
frequency
experiment
SMA
double
pyramid
lattice
sandwich
plate
is
studied.
With
increase
modal
order,
gap
increasing.
effects
loading
rate,
strain
amplitude
cycle
number
on
mechanical
bipyramid
core,
it
found
that
decreases
by
2.44%
when
speed
increases
2
mm/min,
change
rate
about
2.5%
ten
times,
20
N·mm
load
intensity
100
N.
times
absorption
capacity
gradually
weakens
tends
to
stable.
Both
simulation
experimental
results
show
first
three
natural
frequencies
structure
with
fixed
conditions.
numerical
simulation,
loss
core
causes
shape
deform
shift
missing
position,
defect
degree.
In
addition,
according
this
paper,
determined
a
certain
degree
surface
defects
will
not
have
great
impact
overall
structure,
which
good
reference
significance
in
practical
use.
