Waves in Random and Complex Media,
Journal Year:
2021,
Volume and Issue:
34(6), P. 5077 - 5109
Published: Dec. 22, 2021
Stress
wave
propagation
and
free
vibration
response
of
functionally
graded
graphene
platelet
(FG-GPL)-reinforced
porous
joined
truncated
conical–cylindrical-conical
shell
are
investigated
in
this
paper.
The
is
constructed
a
metallic
matrix
reinforced
by
three
types
distribution
GPLs
open-cell
interior
pores.
modified
Halpin–Tsai
estimation
the
generalized
rule
mixture
employed
to
calculate
effective
mechanical
properties
structure.
Three
different
distributions
for
porosity
assumed
along
with
thickness:
two
kinds
symmetric
FG
uniform
porosity.
Rayleigh-Ritz
energy
method,
accompanied
Finite
element
has
been
used
solve
2D-axisymmetric
elasticity
equations.
Furthermore,
Newmark
direct
integration
method
applied
obtain
time
responses
stress
shells
subjected
an
internal
impulse
loading.
A
comparative
detailed
investigation
also
conducted
indicate
effects
boundary
conditions,
geometries,
weight
fraction
GPLs,
coefficient,
dispersion
pattern
on
natural
frequencies,
mode
shapes
histories
displacement
stresses
shell.
Polymer Testing,
Journal Year:
2020,
Volume and Issue:
93, P. 107013 - 107013
Published: Dec. 10, 2020
In
this
paper,
silver
(Ag)
nanoparticles
were
synthesized
by
utilizing
an
aqueous
extract
of
fresh
leaves
Chenopodium
murale
which
is
considered
a
cost-effective
and
eco-friendly
approach.
The
sol-gel
technique
was
used
to
syntheses
TiO2
different
methods
characterize
the
(Ag
TiO2)
including
UV–Vis
spectroscopy,
XRD,
TEM.
Also,
new
nanocomposites
prepared
using
solution
casting
method.
films
characterized
analytical
methods.
absorption
peak
shown
UV–visible
spectrum
around
430
nm.
crystalline
average
size
Ag
NPs
20
nm
while
15
as
displayed
XRD
pattern.
Meanwhile,
degree
amorphicity
Cs/PEO
blend
increased
result
adding
NPs.
It
evident
through
FTIR
spectroscopy
that
there
interaction
between
functional
groups
polymer
Ag/TiO2
nanofiller.
addition,
increase
mechanical
properties
such
Young's
modulus,
elongation,
tensile
strength
with
increasing
content.
clear
impedance
spectroscopic
study
iconic
conductivity
improved
addition
into
system.
highest
log
−9.34
S
cm−1
at
Cs/PEO/0.3%Ag/0.8%TiO2.
also
from
results
antibacterial
activity
pure
doping
blend.
index
(%)
sample
+
(0.3%)
(0.8%)
E.
coli,
S.
aureus,
C.
Albicans,
A.
niger
32,
45.8,
77.8,
92
respectively.
Thus,
these
indicate
applicability
potential
for
use
in
food
packaging
applications.
Defence Technology,
Journal Year:
2022,
Volume and Issue:
24, P. 148 - 163
Published: Oct. 15, 2022
In
this
article,
vibration
characteristics
of
sandwich
plates
with
an
auxetic
honeycomb
core
and
laminated
three-phase
skin
layers
subjected
to
blast
load
are
studied.
Higher-order
ES-MITC3
element
based
on
higher-order
shear
deformation
theory
(HSDT)
achieve
the
governing
equations.
The
ultra-light
feature
layer
(negative
Poisson's
ratio)
reinforced
by
two
layers.
obtained
results
in
our
work
compared
other
previously
published
confirm
accuracy
reliability.
addition,
effects
parameters
such
as
geometrical
material
fully
investigated.
