IEEE Access,
Journal Year:
2020,
Volume and Issue:
8, P. 18995 - 19007
Published: Jan. 1, 2020
Because
of
complex
geo-conditions,
many
caverns
by
solution
mining
in
bedded
salt
rocks
have
different
irregular
shapes.
To
verify
the
feasibility
using
irregular-shaped
for
underground
gas
storage
(UGS),
four
typical
cavern-shapes
are
selected,
and
stability
each
type
is
evaluated
compared
numerical
simulation
methods.
The
results
show
that
UGS
cavern
with
wall
shape
has
lowest
volume
shrinkage
displacement
rock,
but
larger
plastic
zones
appear
their
overhanging
concave
parts.
Ellipsoid-shape
best
stability.
Cylinder-shape
cuboid-shape
poorest
In
these
two
types
caverns,
large
deformations
occur
roof
sidewall,
which
pose
a
great
potential
inducing
collapse
rock.
By
comparison
characteristics
positions
we
found
much
greater
influence
than
sidewall
on
cavern.
must
be
designed
as
an
arch
to
improve
Treatments
irregularly
shaped
changing
operational
pressure
utilization
way
or
modifying
caverns'
also
discussed.
So,
this
study
not
only
determined
state
rocks,
provides
ways
modify
applications.
Mechanics Based Design of Structures and Machines,
Journal Year:
2020,
Volume and Issue:
50(2), P. 509 - 536
Published: Feb. 6, 2020
In
this
study,
a
cylindrical
microshell
stability
reinforced
by
graphene
nanoplatelets
is
investigated
while
an
axial
load
applied
uniformly.
addition,
viscoelastic
foundation
covers
the
composite
nanostructure.
Therefore,
impacts
of
small
scale
parameter
are
studied
nonlocal
strain
gradient
theory
(NSGT)
considered.
The
present
research
deals
for
first
time
with
consideration
viscoelastic,
strain–stress
size-dependent
parameters
along
taking
into
account
various
boundary
conditions
(BCs),
especially
C-F
ones
put
effect
on
proposed
theory.
governing
equations
(G.Eqs)
and
BCs
have
been
obtained
utilizing
energy
method
solved
assistance
generalized
differential
quadrature
(GDQM).
Besides,
validation
results,
results
current
model
compared
to
acquired
from
analytical
method.
show
that,
foundation,
patterns
GPL
distribution,
parameter,
length
layers'
numbers,
condition
as
well
weight
function
considerable
impact
GPLRC
microshell.
Another
significant
result
that;
B.Cs,
at
higher
value
l/R
influence
gGPL
dimensionless
buckling
structure
much
more
remarkable
in
comparison
lower
one
which
section
detail.
investigation
would
be
informative
design
fabrication
microactuators
microsensors.
Mechanics Based Design of Structures and Machines,
Journal Year:
2020,
Volume and Issue:
50(4), P. 1331 - 1353
Published: April 8, 2020
Due
to
the
remarkable
progress
in
field
of
manufacturing
process,
smart
composites
have
become
desired
target
for
high-tech
engineering
applications.
Accordingly,
first
time,
thermal
buckling,
critical
voltage
and
vibration
response
a
thermally
affected
graphene
nanoplatelet
reinforced
composite
(GPLRC)
microdisk
environment
are
explored
with
aid
generalized
differential
quadrature
method
(GDQM).
Also,
current
microstructure
is
coupled
piezoelectric
actuator
(PIAC).
The
extended
form
Halpin-Tsai
micromechanics
used
acquire
elasticity
structure,
whereas,
variation
expansion,
Poisson’s
ratio,
density
through
thickness
direction
determined
by
rule
mixtures.
Hamilton’s
principle
implemented
establish
governing
equations
boundary
conditions
GPLRC
joint
PIAC.
compatibility
satisfied
taking
perfect
bonding
between
core
PIAC
into
consideration.
Maxwell’s
equation
employed
capture
piezoelectricity
effects.
numerical
results
revealed
important
role
distribution
patterns
weight
fraction
GPL
(gGPL),
non-dimensional
(hp/h),
outer
inner
ratio
radius
(Ro/Ri)
applied
on
frequency
behavior,
buckling
system.
Another
valuable
consequence
that
influence
hp
parameter
hardly
dependent
value
temperature
changes
(ΔT).
favorable
suggestion
this
survey
optimized
designing
microsized
circular
plate
should
pay
special
attention
pattern
3
GPLs,
because
increasing
gGPL
structure
increases
but
other
GPL,
phenomenon
inverse.
IEEE Access,
Journal Year:
2020,
Volume and Issue:
8, P. 18995 - 19007
Published: Jan. 1, 2020
Because
of
complex
geo-conditions,
many
caverns
by
solution
mining
in
bedded
salt
rocks
have
different
irregular
shapes.
To
verify
the
feasibility
using
irregular-shaped
for
underground
gas
storage
(UGS),
four
typical
cavern-shapes
are
selected,
and
stability
each
type
is
evaluated
compared
numerical
simulation
methods.
The
results
show
that
UGS
cavern
with
wall
shape
has
lowest
volume
shrinkage
displacement
rock,
but
larger
plastic
zones
appear
their
overhanging
concave
parts.
Ellipsoid-shape
best
stability.
Cylinder-shape
cuboid-shape
poorest
In
these
two
types
caverns,
large
deformations
occur
roof
sidewall,
which
pose
a
great
potential
inducing
collapse
rock.
By
comparison
characteristics
positions
we
found
much
greater
influence
than
sidewall
on
cavern.
must
be
designed
as
an
arch
to
improve
Treatments
irregularly
shaped
changing
operational
pressure
utilization
way
or
modifying
caverns'
also
discussed.
So,
this
study
not
only
determined
state
rocks,
provides
ways
modify
applications.
