Mechanics of Advanced Materials and Structures,
Год журнала:
2023,
Номер
31(27), С. 9099 - 9116
Опубликована: Ноя. 6, 2023
It's
all
about
speed
and
scale
in
the
quickly
evolving
corporate
world
of
today,
business
executives
are
looking
to
cutting-edge
technology
help
them
find
answers
their
most
difficult
problems.
A
data-driven
strategy
provides
means
more
thoroughly
comprehend,
confirm,
quantify
decision-making
outcomes.
It
is
possible
feel
greater
confidence
decisions
made
by
designers
a
business.
So,
using
this
essential
technique,
via
mathematical
modeling,
nonlinear
wave
dispersion
sandwich
nanoshell
Bi-directional
functionally
graded
(BD-FG)
core,
piezoelectric
patch
investigated.
In
first-order
shear
deformation
theory
with
moderately
thick
hypothesis
used
model
displacement
fields
current
work
for
both
layers.
After
that,
compatibility
conditions
presented
interface
equations
between
For
correct
exact
modeling
nanosystem,
nonlocal
strain
gradient
length
parameters
presented.
solving
equations,
harmonic
solution
technic
domain,
multiple
method
time
domain
procedure
section.
decrease
computational
cost
work,
vibration
problem.
Comparing
results
outcomes
solutions
another
published
article
can
verify
results.
Finally,
section,
influences
various
factors
such
as
scale,
nonlocal,
applied
voltage,
area
patch,
FG
power
index,
geometry
condition
structure
on
phase
velocity
BD-FG
coupled
International Journal of Engineering Science,
Год журнала:
2024,
Номер
197, С. 104017 - 104017
Опубликована: Фев. 2, 2024
This
paper
presents
an
investigation
into
the
importance
of
micromechanical
models
in
analysis
forced
vibrations
multi-layered
microplates
under
a
moving
load.
The
microplate
has
core
fabricated
from
functionally
graded
materials
and
face
sheets
consisting
metal
foam.
problem
is
modelled
via
quasi-3D
shear
deformable
method
modified
couple
stress
theory.
study
assumes
that
material
follows
power
gradation
pattern.
Various
models,
i.e.,
Hashin-Shtrikman
bounds,
Voigt-Reuss-Hill,
Voigt,
Reuss,
Tamura,
are
applied
to
estimate
characteristics
core.
sheets,
composed
foams,
possess
closed-
open-cell
solid
porosities.
System's
response
time
history
type
determined
by
numerically
solving
coupled
motion
equations
obtained
using
force-moment
balance
method.
A
finite
element
conducted
for
simplified
macroplate
system,
agreement
between
numerical
results,
proposed
theoretical
approach
theory
developed
this
paper,
found
be
very
good.
results
show
influence
mechanical
properties
layer,
consequently
impacting
moving-load
excited
microsystem.
Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
52(11), С. 9122 - 9143
Опубликована: Апрель 10, 2024
Flexoelectricity
indicates
a
unique
characteristic
of
insulators
and
dielectric
materials
that
results
in
electrical
polarization
induction
response
to
the
non-uniform
strain
gradient.
The
impact
this
property
is
bolder
on
microscale
nanoscale
rather
than
macroscale.
This
article
conducted
derive
governing
equations
motion
for
flexoelectric-multilayer
structure
evaluate
its
vibrational
behavior
various
variable
variations.
model
includes
functionally
graded
(FG)
porous
core
which
confined
between
two
flexoelectricity-based
face
sheets
at
both
sides
Vlasov
type
foundation.
To
gain
equations,
new
power
law
material
beside
Hamilton's
principle
(HP)
modified
couple
stress
theory
(MCST)
implemented.
Capturing
effects
length
scale
parameter,
different
materials,
aspect
thickness
ratios,
porosity
index,
foundation
parameter
boundary
conditions
(B.C.s)
normalized
natural
frequency
(NNF)
such
multilayer
based
novel
FG
formulation
serve
as
main
novelty
article.
According
results,
it
revealed
lateral
ratio
enhancement
causes
NNF
stiffness
reduction
model.
Furthermore,
among
all
considered
B.C.s,
simply
support
(SSSS)
clamped
(CCCC)
refer
lowest
highest
respectively.
content
recent
serves
good
source
provide
better
understanding
high
stiffness-to-weight
structures
Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
unknown, С. 1 - 18
Опубликована: Июнь 14, 2024
A
time-periodic
axial
force
acting
on
a
continuous
structure
can
be
destabilized
by
parametric
excitation.
Moreover,
it
is
capable
of
increasing
the
equivalent
damping
and
shortening
transient
vibrations.
In
this
work,
concept
extended,
dynamic
stability
Mindlin-Reissner
plate
analyzed.
The
FE
formulation
for
four-node
element
derived
employing
variational
approach
including
action
an
force.
system
evaluated
both
numerically
analytically,
using
Floquet
theory
first-order
approximation
based
averaging
method,
respectively.
influence
length,
thickness,
aspect
ratio
highlighted.
It
demonstrated
that
instability
tongue
at
combination
resonance
frequency
summation
type
shifted
toward
higher
amplitudes
width
decreasing
length.
Alternatively,
in
vicinity
difference
shows
antiresonance
which
maximized
exactly
opposite
tuning
design.
This
guideline
important
when
design
under
harmonic
considered.
Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
52(11), С. 8610 - 8638
Опубликована: Март 9, 2024
In
this
study,
the
thermo-mechanical
dynamic
buckling
analysis
of
two-directional
functionally
graded
porous
(2D-FGP)
shallow
microshells
resting
on
elastic
foundations
with
arbitrary
boundary
conditions
is
performed
using
isogeometric
approach.
The
approach
takes
advantage
non-uniform
rational
B-spline
basic
functions
to
exactly
represent
structure
geometry
models
and
attainment
higher
order
approximation
conditions.
characteristics
material
vary
in
both
thickness
axial
x
orientation.
Especially,
a
new
point
length-scale
parameter
microshell
analyzed
as
function
spatial
coordinates
gradient
parameters.
Using
Hamilton's
principle,
modified
couple
stress
theory,
Kirchhoff-Love's
shell
governing
equations
2D-FGP
lying
Pasternak
medium
are
obtained.
A
computer
program
that
employs
an
method
analyze
static
doubly
curved
various
numerical
results
for
thin
cylindrical,
spherical,
hyperbolic
paraboloidal
planforms,
such
rectangular
circular,
presented.
Several
special
cases
used
demonstrate
accuracy
efficacy
developed
model
by
comparing
obtained
proposed
formulations
other
published
data.
addition,
effects
certain
parameters,
length
scale
power-law
indexes,
thickness-to-sides
ratio,
radius
response
double
curvature
explored
depth.
Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
52(11), С. 8569 - 8609
Опубликована: Март 5, 2024
Sandwich
composite
materials
with
corrugated
cores
are
mostly
used
in
industries
like
aircraft,
marine
construction,
automobiles,
and
construction.
constructions
made
for
their
lightweight,
high
strength,
stiffness,
also
the
sandwich
core
structures
useful
dynamic
studies.
A
novel
design
inspired
by
a
woodpecker
beak
microstructure
creates
fillet
edge
champer
designs.
This
motivates
us
to
achieve
energy
absorbing
results
starting
free
vibration
studies
followed
rotating
environment
ASTM
E1876
standards,
non-destructive
approach,
determine
material
properties
of
carbon
fiber-polylactic
acid
(CF-PLA)
glass
fiber
reinforced
polymer
(GFRP),
along
alternative
method
(ADM)
property
evaluation.
The
hand
lay-up
technique
is
fabrication
evaluated
testing
appropriate
boundary
conditions.
Internet
Things
technology
has
been
analyzing
vibrations
setup
250,
500,
750,
1000
rpm.
It
was
observed
that
pattern
more
efficient
natural
frequency
than
pattern.
Furthermore,
parametric
evaluations
were
performed
various
ply
configurations
numerical
simulations
Environment.
Also,
effective
seen
bioinspired
structure
achieves
stiffness
both
rotational
environments,
despite
conditions
circumstances.
Therefore,
3D
printed
particular
GFRP
factsheet
orientation
brings
out
novelty
this
research.
Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
52(11), С. 9526 - 9561
Опубликована: Май 17, 2024
The
present
article
deals
with
the
application
of
refined
plate
theory
and
surface
effects
to
investigate
nonlocal
free
vibration
behavior
a
functionally
graded
nano-plate
composed
two
piezoelectric
face
sheets
resting
on
Orthotropic
Visco-Pasternak.
Surface
are
applied
using
piezoelectricity
stress-strain
gradient
theories.
effects,
quasi-3D
higher-order
theory,
neutral
position
in-plane
mechanical
preloads
considered
study
sandwich
core
in
this
for
first
time,
simultaneously.
size-dependent
governing
equations
derived
based
2D
3D
Hamilton's
principle
different
boundary
conditions
studied
investigated
according
semi-analytical
solution
method.
Comparing
results
models,
local
non-local
also,
examining
foundations
simultaneously
can
be
said
as
one
innovations
current
research.
Finally,
parametric
is
presented
examine
parameters
such
small
scale
parameters,
preloads,
thickness
stretching
position,
non-homogeneous
coefficient,
voltage,
foundation
constants,
conditions,
geometrical
ratios
theories
details.
It
indicated
that
inclusion
leads
significant
influence
three-layered
nano-scale
plates.
may
provide
useful
guidance
design
development
next
generation
nano-devices.
Mechanics Based Design of Structures and Machines,
Год журнала:
2024,
Номер
52(10), С. 8063 - 8085
Опубликована: Фев. 15, 2024
Due
to
the
frequent
occurrence
of
cracks
as
structures
age,
examining
size-dependent
responses
cracked
micro/nanobeams
is
critical
for
safely
designing
and
optimizing
high-tech
devices
such
those
used
in
MEMS/NEMS.
With
this
understanding,
we
present
bending
buckling
studies
nanobeams
with
different
boundary
edges
adopting
well-posed
stress-driven
nonlocal
integral
model
discontinuity.
Since
presence
a
crack,
beam
divided
into
two
segments
connected
by
rotary
spring
linear
spring,
whose
elastic
coefficients
can
be
determined
through
compliance
calibration
methods.
We
propose
an
efficient
method
solve
original
directly
converting
form
constitutive
equation
general
Laplace
transform
technique,
equipped
three
extra
constraint
conditions.
Subsequently,
governing
equations
are
solved
considering
standard
compatibility
conditions
well
conditions,
while
deformation
loads
various
bounded
presented
analytically
crack.
After
verifying
derived
formulation,
influence
crack
length
location
nonlocality
on
deflections
first
several
modes
investigated
detail.
Communicated
Rossana
Dimitri.
