In
this
work,
we
propose
a
new
phase-field
formulation
with
dynamic
JH2
constitutive
model
in
the
updated
Lagrangian
finite
element
framework
for
capturing
blastinginduced
failure
and
breakage
phenomena
rock
masses.
We
innovatively
formulate
phasefield
evolution
by
taking
mechanical
strengths
failure/breakage
characteristics
of
materials
at
intact
residual
states
under
loading
conditions.
further
develop
free
energy
decomposition
strategy
thermodynamically
consistent
known
classical
analysis.
To
obtain
stable
solutions,
employ
staggered
time
integration
equations
linear
momentum
balance
evolution.
Several
numerical
examples
are
performed
not
only
quantitative
qualitative
validation,
but
also
providing
deep
insights
into
blasting-induced
mechanisms
Journal of the Mechanics and Physics of Solids,
Journal Year:
2023,
Volume and Issue:
173, P. 105228 - 105228
Published: Feb. 2, 2023
We
present
a
new
phase-field
formulation
for
the
formation
and
propagation
of
compaction
band
in
high-porosity
rocks.
Novel
features
proposed
include
(a)
effects
inertia
on
rate
development
bands,
(b)
degradation
mechanisms
tension,
compression,
shear
appropriate
dynamic
strain
localization
problems
where
disturbances
propagate
time
wave-like
fashion
to
induce
micro-cracking,
grain
crushing,
frictional
rearrangement
rock.
also
robust
numerical
technique
handle
spatiotemporal
evolution
band.
validate
model
by
simulating
benchmark
problem
involving
V-shape
notched
cylindrical
specimen
Bentheim
sandstone
tested
conventional
triaxial
compression.
The
is
shown
reproduce
different
geometric
styles
deformation
that
pure
compaction,
shear-enhanced
combination
mechanism
consists
straight
primary
surrounded
secondary
chevron
bands.
Computer Methods in Applied Mechanics and Engineering,
Journal Year:
2023,
Volume and Issue:
414, P. 116169 - 116169
Published: June 26, 2023
This
paper
deals
with
the
numerical
simulation
of
initiation
and
propagation
mixed
mode
fracture
in
rocks.
A
bond-level
energy-based
peridynamic
model
is
developed
by
introducing
a
dilatation
function
to
capture
both
volumetric
deviatoric
deformations.
We
proceed
define
nonlocal
stresses
obtain
isotropic
forces
commensurate
then
come
up
new
failure
link
computational
peridynamics
some
phenomenological
criteria,
which
highly
relevant
for
brittle
quasi-brittle
Finally,
several
examples
mixed-mode
fractures
are
presented
show
performance
our
model.
International Journal of Mechanical Sciences,
Journal Year:
2023,
Volume and Issue:
252, P. 108368 - 108368
Published: April 14, 2023
We
formulate
a
modified
phase-field
model
for
cohesive
interface
failure
in
quasi-brittle
solids.
Our
has
two
novel
features:
(i)
traction–separation-damage
law
damage
process;
(ii)
an
energetic
degradation
function
controlled
by
critical
gap
ratio.
This
modification
offers
attractive
approach
to
simulate
the
process.
also
provide
robust
numerical
solution
strategy
treat
spatio-temporal
evolution
of
failure.
is
validated
benchmark
problems
including
constant
strain
patch
test
and
mode-I
delamination
test.
The
simulations
are
compared
with
some
published
data.
proceed
apply
this
study
complex
mechanism
peeling
on
bi-material
plates
crack
impinging
interfaces
different
scenarios,
where
effects
ratios
inclination
angles
discussed.
