International Journal for Numerical and Analytical Methods in Geomechanics,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 19, 2024
ABSTRACT
We
present
a
double‐phase–field
framework
for
tensile
fracturing
processes
in
transversely
isotropic
rocks.
Two
distinct
phase‐field
variables
are
introduced
to
represent
smeared
approximations
of
fractures
along
the
weak
bedding
planes
and
through
anisotropic
rock
matrix,
respectively.
Driving
forces
that
control
fracture
propagation
constructed
as
stress‐based
formula
with
recently
developed
failure
criterion
distinguishes
two
modes
For
numerical
implementation,
we
adopt
staggered
integration
scheme
decouple
governing
equations
so
displacement
field
can
be
updated
sequence
given
loading
step.
The
finite
element
formulation
proposed
is
detail
this
paper
implemented
an
in‐house
code.
implementation
then
validated
by
reproducing
uniaxial
tension
test
results
Lyons
sandstone.
After
that,
conduct
simulations
on
pre‐notched
square
plate
loaded
demonstrate
features
framework.
Finally,
three‐point
bending
tests
Pengshui
shale
show
model
reproduce
force–displacement
curves
patterns
specimens
different
plane
orientations
observed
laboratory
experiments.
Rock Mechanics and Rock Engineering,
Год журнала:
2024,
Номер
57(6), С. 4443 - 4472
Опубликована: Апрель 24, 2024
Abstract
In
the
Mont
Terri
Rock
Laboratory
(Switzerland),
an
interdisciplinary
examination
program
is
carried
out
to
increase
knowledge
about
coupled
hydro-mechanical
effects
in
Opalinus
Clay,
which
are
of
significant
interest
regarding
stability
and
integrity
a
potential
storage
facility
for
high-level
radioactive
waste.
This
article
focuses
on
characterization
claystone
near
field
excavations
related
hydraulic
due
excavation
ventilation.
Electrical
resistivity
tomography
(ERT)
applied
characterize
OPA:
Several
open
fractures
correlate
with
regions
high
values,
indicating
preferential
flow
paths
that
relevant
transport
processes.
Due
combined
interpretation
ERT
long-term
monitoring
seasonally
repeated
nuclear
magnetic
resonance
(NMR)
measurements,
relationship
between
electrical
water
content
can
be
established,
resulting
also
time-dependent
map
around
different
climatic
conditions.
The
statistical
these
measurements
indicates
existence
small-scale
singularities
contrast
dominating,
more
homogeneous
zones.
presented
approach
leads
better
process
understanding
heterogeneous
provides
valuable
basis
pragmatic
safety
assessment.
International Journal for Numerical and Analytical Methods in Geomechanics,
Год журнала:
2024,
Номер
48(10), С. 2615 - 2631
Опубликована: Апрель 24, 2024
Abstract
In
this
manuscript,
a
novel
transformed
differential
quadrature
solution
to
the
coupled
thermo‐hydro‐mechanical
(THM)
problem
of
layered
transversely
isotropic
(TI)
saturated
media
is
proposed,
accompanied
by
sensitivity
analysis
pertinent
parameters.
Initially,
THM
governing
equations
that
encompass
transverse
isotropy
characteristics
thermal,
permeable,
and
mechanical
properties
are
introduced.
Subsequently,
utilizing
method
(TDQM),
discretized
algebraic
in
domain
derived.
Boundary
conditions
related
stresses,
displacements,
temperatures
defined
leveraging
integral
transform
techniques
stress‐strain
relationship,
while
for
continuity
across
adjacent
layers
incorporated.
The
global
matrix
equation
assembled
solved.
After
verifying
proposed
TDQM
solution,
on
complex
parameters
conducted
identify
principal
factors
influencing
coupling
behaviors,
thereby
simplifying
discussion
practical
engineering
applications.
International Journal for Numerical and Analytical Methods in Geomechanics,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 19, 2024
ABSTRACT
We
present
a
double‐phase–field
framework
for
tensile
fracturing
processes
in
transversely
isotropic
rocks.
Two
distinct
phase‐field
variables
are
introduced
to
represent
smeared
approximations
of
fractures
along
the
weak
bedding
planes
and
through
anisotropic
rock
matrix,
respectively.
Driving
forces
that
control
fracture
propagation
constructed
as
stress‐based
formula
with
recently
developed
failure
criterion
distinguishes
two
modes
For
numerical
implementation,
we
adopt
staggered
integration
scheme
decouple
governing
equations
so
displacement
field
can
be
updated
sequence
given
loading
step.
The
finite
element
formulation
proposed
is
detail
this
paper
implemented
an
in‐house
code.
implementation
then
validated
by
reproducing
uniaxial
tension
test
results
Lyons
sandstone.
After
that,
conduct
simulations
on
pre‐notched
square
plate
loaded
demonstrate
features
framework.
Finally,
three‐point
bending
tests
Pengshui
shale
show
model
reproduce
force–displacement
curves
patterns
specimens
different
plane
orientations
observed
laboratory
experiments.
