International Journal of Structural Stability and Dynamics,
Год журнала:
2022,
Номер
23(03)
Опубликована: Июль 26, 2022
In
this
research,
the
natural
frequency
behavior
of
functionally
graded
(FG)
porous
joined
hemispherical–cylindrical–hemispherical
shell
vessels
reinforced
by
graphene
platelet
(GPLs)
has
been
studied
for
first
time.
Three
various
types
porosity
distribution
are
assumed
through
thickness
direction
vessel.
two
patterns,
a
pattern
porosities
in
metal
matrix
is
symmetric
and
other
one
uniform.
Besides,
five
GPL
patterns
dispersing
GPLs
matrix.
Extended
role
mixture
Tsai-Halpin
used
to
determine
mass
density
Young’s
modulus
elasticity
structure,
respectively.
By
employing
3D
theory,
Hamilton’s
Principal
FEM
conjunction
with
Rayleigh–Ritz
method,
governing
equations
motion
vessel
obtained
frequencies
extracted.
The
impact
factors
such
as
coefficient
porosity,
several
along
different
distributions
weight
fraction
nanofillers
on
FG
reported
Journal of Materials Research and Technology,
Год журнала:
2023,
Номер
24, С. 7570 - 7598
Опубликована: Май 1, 2023
This
study
presents
a
review
of
the
effect
nano-additives
in
improving
mechanical
properties
composites.
Nano-additives
added
to
composites,
also
termed
nanocomposites,
have
promising
applications
aerospace,
medical,
biomedical,
automotive,
and
military.
The
nanoparticles
alter
either
surface,
bulk,
or
both,
depending
upon
process,
dramatically
change
thermal
conductivity,
tensile
strength,
flexural
fatigue
impact
resistance,
vibration
buckling,
post-buckling,
surface
modification,
application
machine
learning
as
well
optimization
methods
nanocomposite
materials.
Such
transformations
composite
materials
are
extensively
studied
by
researchers
positive
implications
successfully
deployed
various
applications.
Interestingly,
recent
findings
revealed
that
weak
chemical
bonding
between
fiber
matrix
phase
is
main
reason
for
delamination,
however,
addition
nanoparticles,
chances
delamination
reduced
even
under
excessive
loading.
Graphene
multi-walled
carbon
nanotubes
(MWCNTs)
most
excessively
reported
nanomaterials
enhancing
behavior
energy
absorption
capacity,
decreasing
adverse
effects
due
porosity
within
structure.
Also,
techniques
showed
be
way
further
improve
while
reducing
total
cost
fabrication
process
predicting
providing
optimum
characteristics
with
acceptable
accuracy
compared
realistic
conditions.
Applied Sciences,
Год журнала:
2022,
Номер
12(8), С. 3932 - 3932
Опубликована: Апрель 13, 2022
The
present
work
studies
an
axisymmetric
rotating
truncated
cone
made
of
functionally
graded
(FG)
porous
materials
reinforced
by
graphene
platelets
(GPLs)
under
a
thermal
loading.
problem
is
tackled
theoretically
based
on
classical
linear
thermoelasticity
approach.
consists
layered
material
with
uniform
or
non-uniform
dispersion
GPLs
in
metal
matrix
open-cell
internal
pores,
whose
effective
properties
are
determined
according
to
the
extended
rule
mixture
and
modified
Halpin–Tsai
model.
A
finite
element
method
(FEM)
Rayleigh–Ritz
energy
formulation
Crank–Nicolson
algorithm
here
applied
solve
both
time
space
domain.
thermo-mechanical
response
checked
for
different
porosity
distributions
(uniform
graded),
together
types
GPL
patterns
across
thickness.
parametric
study
performed
analyze
effect
coefficients,
weight
fractions
GPL,
semi-vertex
angles
cone,
circular
velocity,
thermal,
kinematic,
stress
structural
member.
Mechanics of Advanced Materials and Structures,
Год журнала:
2022,
Номер
30(19), С. 4016 - 4027
Опубликована: Июнь 14, 2022
The
present
research
proposes
an
applicable
and
impressive
analytical
model
of
Aircraft
Engine
Cowl
(AEC)
due
to
auspicate
its
frequency
parameter.
For
the
first
time,
authors
configured
structure
AEC
by
joining
two
well-known
shapes
shell,
including
elliptical
conical.
This
procedure
is
implemented
obtaining
governing
motion
organization
differential
equations
affiliated
with
Joined
Elliptical-Conical
Shells
(JECS)
in
line
first-order
shear
deformation
theory
(FSDT)
General
Shell
Formulation
(GSF).
Moreover,
Functionally
Graded
Materials
(FGMs)
various
spreading
forms
along
structure’s
thickness
are
used
enhance
dynamic
performance
AEC.
It
worth
mentioning
that
recognized
Rule
Mixture
(RM)
engaged
for
achieving
equivalent
mechanical
characteristics
FGM.
Finally,
a
semi-analytical
Generalized
Differential
Quadrature
(GDQ)
hired
extract
resulting
system
access
free
vibration
responses
diverse
Boundary
Conditions
(BCs).
interesting
numerical
done
inspect
remnants
geometric
material
features
on
oscillation
demeanor
structures.
will
be
verified
projected
can
helpful
AEC’s
analysis
extendable
other
types
studies
predict
structure's
static
treatment.
