Journal of Engineering Mechanics,
Год журнала:
2023,
Номер
149(10)
Опубликована: Авг. 10, 2023
This
paper
presents
a
semianalytical
methodology
for
the
nonlinear
vibration
of
functionally
graded
microplate
under
transverse
patch
loadings.
The
higher-order
shear
deformation
theory
(HSDT)
is
combined
with
modified
strain
gradient
(MSGT)
to
model
microplate.
power-law
function
used
material.
Hamilton's
principle
obtain
governing
partial
differential
equations
motion,
which
are
then
solved
using
Galerkin's
method.
free
and
forced
responses
obtained
incremental
harmonic
balance
(IHB)
method,
where
part
performed
arc-length
continuation
methods.
dependence
steady-state
amplitude
on
initial
perturbation
studied
time
history
plots.
These
plotted
Newmark-β
effects
various
parameters
such
as
index,
thickness
plate,
material
length
scale
parameter
ratio,
damping
coefficient,
different
boundary
conditions,
positions
loading
its
concentrations
characteristics
examined
in
detail.
Progress in Materials Science,
Год журнала:
2022,
Номер
131, С. 101021 - 101021
Опубликована: Сен. 21, 2022
The
rapid
progress
of
advanced
manufacturing,
multidisciplinary
integration
and
artificial
intelligence
has
ushered
in
a
new
era
technological
development
the
design
lightweight,
well-integrated,
multifunctional,
intelligent,
flexible
biomimetic
materials
structures.
traditional
approach
structural
research
poses
several
intrinsic
limitations
on
practical
performance
devices
instruments
harsh
industrial
environments,
due
to
factors
such
as
disconnection
between
low
efficiency
manufacture
complex
structures,
reduced
actual
mechanical
integrity
reliability
manufactured
structures
compared
theoretical
values
obtained
from
design,
insufficient
level
multifunctional
integration,
excessive
economic
cost.
In
addition,
incorporated
equipment
often
need
withstand
extreme
service
it
is
increasingly
important
further
integrate
manufacture,
function,
evaluation
application
provide
technical
bases
for
optimizing
their
fabrication.
view
above,
authors
propose
paradigm
"mechanostructures,"
which
aims
achieve
target
responses
environments
by
integrating
manufacturing
evaluation.
By
designing
novel
based
desired
static
dynamic
considering
behavior
throughout
whole
deformation
process,
field
"mechanostructures"
pursues
an
application-oriented
approach.
As
typical
example
mechanostructures,
lightweight
lattice
with
high
stiffness,
strength,
impact
resistance,
energy
absorption
capacity,
shock
wave
attenuation
noise
reduction
show
great
potential
applications
aerospace,
transportation,
defense,
biomedical,
energy,
machinery,
other
fields.
this
respect,
metastructures
inspired
polycrystalline
microstructures
presented,
starting
discussion
properties
conflicts,
demonstrating
scientific
merits
innovative
manipulation
properties,
elaboration
underlying
physical
mechanisms.
Reports in Mechanical Engineering,
Год журнала:
2022,
Номер
3(1), С. 283 - 300
Опубликована: Март 23, 2022
Honeycomb
sandwich
is
really
one
of
the
fundamentals
to
make
a
composite
strong,
stiff,
very
light,
safe
and
have
wonderful
performance.
materials
are
majorly
used
where
high
strength
weight
ratio,
stiffness
ratio
needed.
consist
two
face
sheet
or
skin
light
core
which
can
take
many
shapes,
common
hexagonal
shape.
The
handles
shear
load,
while
skins
resist
compression
tension.
This
paper
aims
guide
design
honeycomb
structures
done
with
finite
element
analysis
software.
characteristic
at
microstructure
unit
cell
will
be
discussed
Moreover,
much
demand
on
that
withstand
heavy
loads
under
different
working
condition
demand.
Experimental
approach
time
consuming
costly,
this
created
room
for
massive
research
using
FEA
loading
response
various
cores
thickness,
in
order
investigate
mechanical
properties.
study
focus
by
researches
currently
commercial
software’s
ANSYS
ABAQUS,
guideline
see
what
has
been
obtainable
Advanced Materials,
Год журнала:
2021,
Номер
33(30)
Опубликована: Июнь 13, 2021
Abstract
The
design
of
advanced
functional
devices
often
requires
the
use
intrinsically
curved
geometries
that
belong
to
realm
non‐Euclidean
geometry
and
remain
a
challenge
for
traditional
engineering
approaches.
Here,
it
is
shown
how
simple
deflection
thick
meta‐plates
based
on
hexagonal
cellular
mesostructures
can
be
used
achieve
wide
range
intrinsic
(i.e.,
Gaussian)
curvatures,
including
dome‐like
saddle‐like
shapes.
Depending
unit
cell
structure,
non‐auxetic
positive
Poisson
ratio)
or
auxetic
negative
plates
obtained,
leading
value
Gaussian
curvature
upon
bending,
respectively.
It
found
bending
such
along
their
longitudinal
direction
induces
transverse
direction.
Experimentally
numerically,
amplitude
this
induced
related
meta‐plate.
approach
proposed
here
constitutes
general
route
rational
with
geometries.
To
demonstrate
merits
approach,
scaling
relationship
presented,
its
validity
demonstrated
by
applying
3D‐printed
microscale
meta‐plates.
Several
applications
adaptive
optical
adjustable
focal
length
soft
wearable
robotics
are
presented.
ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik,
Год журнала:
2021,
Номер
101(11)
Опубликована: Май 28, 2021
Abstract
Although
the
primacy
and
utility
of
higher‐gradient
theories
are
being
increasingly
accepted,
values
second
gradient
elastic
parameters
not
widely
available
due
to
lack
generally
applicable
methodologies.
In
this
paper,
we
present
such
for
a
second‐gradient
continuum.
These
obtained
in
framework
finite
deformations
using
granular
micromechanics
assumptions
materials
that
have
textures
at
some
‘microscopic’
scale.
The
presented
approach
utilizes
so‐called
Piola's
ansatz
discrete‐continuum
identification.
As
fundamental
quantity
approach,
an
objective
relative
displacement
between
grain‐pairs
is
deformation
energy
grain‐pair
defined
terms
measure.
Expressions
constants
macroscopically
linear
continuum
micro‐scale
parameters.
Finally,
main
result
same
coefficients,
both
2D
3D
cases,
been
identified
Young's
modulus,
Poisson's
ratio
microstructural
length.
