International Journal of Structural Stability and Dynamics,
Год журнала:
2023,
Номер
24(18)
Опубликована: Ноя. 3, 2023
The
utilization
of
functionally
graded
graphene
platelet-reinforced
composites
(FG-GPLRC)
and
honeycomb
sandwich
constructions
is
prevalent
in
the
field
engineering.
Therefore,
it
crucial
to
investigate
buckling
vibration
properties
these
materials
under
heat
circumstances.
This
paper
specifically
focuses
on
thermal
characteristics
a
novel
multi-arc
concave
plate
(MACHSP)
equipped
with
an
adjustable
positive-negative
Poisson’s
ratio.
governing
equations
motion
for
system
are
derived
based
first-order
shear
deformation
theory
conjunction
Hamilton’s
principle.
formulation
system’s
characteristic
equation
involves
establishment
displacement
functions
that
satisfy
distinct
boundary
conditions.
Using
computational
programming,
natural
frequencies,
mode
shapes,
critical
temperatures
MACHSP
three
different
FG-GPLRC
distributions
influences
determined.
Subsequently,
results
compared
outcomes
from
finite
element
simulations
findings
previously
published
literature.
Additionally,
amplitude-frequency
response
structure
harmonic
excitation
analyzed,
followed
by
discussion
impact
structural
parameters
its
characteristics.
indicate
established
theoretical
model
predicting
distribution
aligns
well
simulation
models
prior
research.
In
contrast
solid
plates,
not
only
achieves
substantial
reduction
weight
but
also
demonstrates
significant
increase
frequency.
Furthermore,
platelets
have
potential
enhance
structure’s
frequency
values
temperatures.
Lastly,
various
exert
notable
influence
performance.
Mechanics of Advanced Materials and Structures,
Год журнала:
2023,
Номер
31(24), С. 6298 - 6318
Опубликована: Июль 9, 2023
The
core
part
of
this
study
is
comprised
using
the
soft
computational
approach
for
analyzing
thermoelastic
reaction
a
concrete
sandwich
beam
with
transversely-graded
composite
face
sheets
as
an
advanced
building
material
exposed
to
axially-directed
abrupt
thermal
load.
First
all,
relations
governing
motion
are
extracted
from
principles
three-dimensional
elasticity
theory.
Besides,
time-variable
heat
conduction
derived
based
on
Fourier
cooperating
Lord–Shulman
theorem
transfer.
Continuity
displacements
and
stresses
core's
borders
interacting
taken
into
consideration.
To
find
solution
equations
motion,
Laplace
transform
in
conjunction
differential
quadrature
(DQA)
utilized.
Transforming
system's
space
time
domain
done
through
extended
expression
Dubner
Abate's
approach.
speed
up
process,
bases
optimizing
deep
neural
network
shuffled
frog
leaping
algorithm
(SFLA)
implemented.
Efficiency
applied
methods
inspected
though
comparing
their
outcomes
those
obtained
existing
literature
different
boundary
conditions.
Mechanics of Advanced Materials and Structures,
Год журнала:
2023,
Номер
31(18), С. 4399 - 4422
Опубликована: Сен. 5, 2023
The
present
research
bridges
the
gap
between
a
numerical
solution
with
efficient
machine-learning-based
algorithms
to
provide
strong
platform
for
predicting
thermomechanical
shock
behavior
of
sandwich
cylindrical
panels
polymer-made
core
and
circumferentially-graded
graphene-plates
reinforced
(CG-GPLR)
nanocomposite
face-sheets.
comprehensive
declaration
elasticity
theory
is
considered
establish
governing
equations
system
in
three
orthogonal
directions.
well-known
Lord-Shulman
heat
transfer
theorem
implemented
time-variant
nature
system's
heat.
differential
quadrature
method
(DQM)
used
as
approach
solve
spatial
dependency
equations.
While
Laplace
transform
solves
time
In
order
decline
computational
cost
analysis
response
system,
an
algorithm
employed
way
that
it
only
requires
information
selective
set
points
known
training
set.
After
completion
procedure,
this
machine-learning
predictor
can
easily
predict
thermoelastic
all
included
either
train
or
new
point.
Validation
applied
performed
through
comparative
process
results
those
determined
published
literature.
study
are
excellent
compatibility
obtained
solo
solution.
Polymer Composites,
Год журнала:
2023,
Номер
45(1), С. 151 - 168
Опубликована: Сен. 21, 2023
Abstract
In
cold
regions,
the
coupling
of
freeze–thaw
cycles
and
sulfate
frequently
impairs
performance
FRP‐bonded
concrete,
resulting
in
a
shortened
service
life.
Carbon
fiber
polymer
(CFRP)
glass
(GFRP)
are
used
to
paste
pre‐cracked
concrete
beams
experiment,
three
unfavorable
environments
created:
cycle,
10%
solution
erosion,
erosion.
This
paper
investigates
durability
FRP
bonded
using
microscopic,
mechanical
dynamic
modulus
elasticity
tests,
as
well
post‐erosion
damage
values
finite
element
modeling.
After
400
h
coupled
sulphate
erosion
cyclic
environments,
strength
CFRP
was
reduced
by
66.3%,
14.6%
42.0%
GFRP
67%,
21.9%
52.3%
respectively.
The
results
show
that
single
attack
does
not
cause
significant
beams,
but
it
can
exacerbate
caused
cycles.
A
model
based
on
Lemaitre
strain
equivalence
assumption
predicted
actual
specimens.
accurately
predict
bond
surface
under
loading.
Highlights
adhered
Microscopic,
mechanical,
elastic
tests
Freeze–thaw
environment
mass
fraction
Coupled
models
for
salt
developed
‐reinforced
subjected
simulated
with
ABAQUS
Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 21, 2024
This
paper
presents
the
semi-analytical
approach
for
nonlinear
dynamic
responses
of
porous
graphene
platelet-reinforced
circular
plates
(CiPs)
and
spherical
shells
(SpSs)
resting
on
Pasternak
foundation
in
thermal
environment.
The
platelets
(GPLs)
are
distributed
functionally
graded
(FG)
distribution
patterns
uniform
pattern
through
CiP
SpS
thickness
direction.
governing
equations
GPL-reinforced
structures
subjected
to
time-dependent
external
pressure
respected
harmonic
linear
functions
time
established
based
geometrically
higher-order
shear
deformation
theory.
A
simple
effective
solution
considered
problem
is
using
Euler-Lagrange
equations,
damping
viscosity
can
be
counted
Rayleigh
dispassion
function.
Runge-Kutta
method
employed
determine
structures,
while
fundamental
frequencies
free
vibration,
frequency-amplitude
curves
obtained
explicit
form.
numerical
results
reveal
that
GPL
distributions,
geometrical
material
properties
significantly
affect
curves,
harmonically
loaded
linearly
specially,
buckling
phenomenon
clearly
observable
with
SpSs
but
not
CiPs.
Journal of Composite Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 29, 2024
The
incorporation
of
carbon
nanotubes
(CNT)
into
a
polymer
matrix
has
opened
up
exciting
possibilities
for
creating
Nano-composite
materials
with
exceptional
mechanical
properties.
In
this
study,
the
buckling
behavior
reinforced
plate
mixed
CNTs
is
investigated.
Various
factors,
such
as
plate’s
shape
and
elastic
base,
are
examined
their
effects
on
behavior.
investigation
grounded
in
scientific
rigor,
drawing
upon
several
theories
that
address
Specifically,
high-order
theory,
which
accounts
transverse
shear
parabolic
distribution
stresses
across
thickness,
employed.
By
analyzing
critical
load,
interaction
between
different
types
within
medium
explored.
model’s
governing
equations,
derived
from
Hamilton’s
principle,
allow
prediction
loads
associated
axial
compression
buckling.
Notably,
it
found
distribution,
coupled
Winkler—Pasternak
foundation,
renders
less
flexible
compared
to
scenarios
without
an
foundation.
This
insight
leads
crucial
enhancement
load.
significance
incorporating
matrices
achieve
nanocomposite
properties
underscored.
foundation
study
rests
provides
valuable
insights
designing
robust
efficient
structures.
International Journal of Cast Metals Research,
Год журнала:
2023,
Номер
37(1), С. 39 - 47
Опубликована: Ноя. 24, 2023
In
order
to
strengthen
and
obtain
the
optimised
processing
parameters
during
modified
SiC
nanoparticles
reinforce
ZA27
alloys.
The
present
investigation
deals
with
effects
of
trace
amount
on
microstructures
mechanical
properties
alloy.
results
indicate
that
are
effectively
refined
by
nanoparticles.
It’s
likely
fade
effect
for
raise
addition
temperature,
prolong
holding
time,
increase
pouring
temperature
enhance
cooling
rate.
this
experiment,
when
is
0.5%,
680°C,
time
3
min,
600°C
mould
preheated
at
200°C,
microstructure
alloy
better.
action
mechanisms
also
discussed.
