Frontiers in Physics,
Journal Year:
2023,
Volume and Issue:
11
Published: Dec. 13, 2023
In
this
study,
the
mechanical
characteristics
of
graded
origami
bellows
were
numerically
investigated
and
experimentally
validated.
Two
geometric
parameters
considered:
pre-folding
angle
(
θ
)
layer
height
L
e
).
The
sensitivities
deployment
process
energy
absorption
efficiency
to
variations
in
under
quasi-static
loading
dynamic
investigated.
Results
show
that
with
positive
gradients
exhibited
progressive
process.
More
than
one
deformation
mechanism
was
triggered
during
deployment,
indicating
a
mixed
non-rigid
mode.
A
large
gradient
had
notable
effect
on
efficiency.
Both
specific
SEA
mean
tensile
force
P
m
decreased
as
increased.
Although
insensitive
response,
behavior
models
indicated
both
initial
peak
affected
by
parameters.
general,
proposed
controllable
stable
response
axial
tension.
Thin-Walled Structures,
Journal Year:
2023,
Volume and Issue:
188, P. 110772 - 110772
Published: May 7, 2023
Origami-inspired
metamaterials
are
increasingly
being
applied
to
the
fields
of
science
and
engineering
owing
their
unique
mechanical
characteristics.
Geometric
material
arrangements
panels
creases
can
lead
different
properties
origami
structures,
such
as
energy
absorption
multi-stability.
The
actual
folding
processes
structures
usually
include
crease
rotation
panel
deformation.
However,
traditional
analytical
or
empirical
solutions
based
on
rigid
assumptions
cannot
sufficiently
reflect
process
precisely.
Finite
element
analysis
provide
detailed
information,
but
it
is
a
highly
time-consuming
cycle,
including
modeling
computing.
Typically,
conventional
data-driven
approaches
necessitate
considerable
amount
data
samples
analyze
structures.
unavailability
extensive
datasets
poses
major
impediment
in
employing
methods
explore
authentic
behavior
Based
situations
above,
new
framework
with
conditional
generative
adversarial
networks
tabular
(CTGAN)
proposed
this
study.
To
verify
feasibility
framework,
two
study
cases
presented
herein:
Miura-ori
structure
in-plane
quasi-static
compression
square-twist
(Type
1)
process.
Energy
predicted
accurately
efficiently
by
small
number
samples,
which
consistent
results
large
dataset.
not
only
provides
promising
solution
for
also
overcomes
bottlenecks
(small
sample
mixture
types)
associated
machine
learning
area.
Materials Horizons,
Journal Year:
2024,
Volume and Issue:
11(24), P. 6352 - 6360
Published: Jan. 1, 2024
We
propose
a
mechanical
metamaterial
that
enables
energy
dissipation
in
the
tensile
direction.
Its
mechanism,
driven
by
elastic
instability
from
self-contact,
offers
superior
comprehensive
performance
compared
to
existing
works.
Mechanics of Advanced Materials and Structures,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 16
Published: June 7, 2024
Rigid
polyurethane
foam,
known
for
its
low
density,
lightweight,
and
excellent
energy
absorption
properties,
has
been
effectively
employed
to
enhance
the
capacity
of
origami-folded
thin-walled
square
tubes
filled
with
graded
foam.
In
this
study,
quasi-static
compression
experiments
finite
element
simulations
were
conducted
on
3D-printed
The
impact
factors
such
as
number
folding
layers,
interlayer
dihedral
angles,
wall
thickness,
various
foam
densities
characteristics
these
was
analyzed.
It
found
that
incorporation
fold
designs
significantly
improved
properties
tubes.
Notably,
origami
positively
outperform
their
negatively
single-density
foam-filled
counterparts
in
terms
capability.
research
underscores
offering
valuable
insights
optimizing
structures
involving
more
intricate
patterns
subsequent
filling.Keywords
Materials & Design,
Journal Year:
2024,
Volume and Issue:
240, P. 112874 - 112874
Published: March 26, 2024
Origami
cylinders
have
been
studied
extensively
under
compression,
however,
their
normal
force
response
shear
deformation
is
still
ill-understood.
We
experimentally
the
shear-induced
of
these
systems
and
provided
a
simple
model
to
predict
this
in
Yoshimura
Kresling
origami
range
small
deformations.
Besides
that,
effect
disorder
little
understood
those
patterns.
Therefore,
we
investigate
show
it
can
lead
diverse
responses
perpendicular
crumpled
Yoshimura,
with
slopes
torsion
that
be
positive,
zero,
or
negative
depending
on
disordered
pattern
folds.
The
leads
an
asymmetry
concerning
shearing
direction,
which
quantified
via
index
from
2D
Fast
Fourier
transform
spectrum
crease
images.
This
found
linearly
related
slope
force-torsion
relationship.
Materials,
Journal Year:
2024,
Volume and Issue:
17(13), P. 3263 - 3263
Published: July 2, 2024
Taking
austenitic
stainless-steel
bellows
as
the
research
object,
a
finite
element
model
for
heat
treatment
of
was
constructed
based
on
ABAQUS
CAE
2022.
The
physical
properties
after
were
analyzed
using
experimental
and
simulated
curve
processing
analysis
methods.
changes
in
residual
stress
deformation
relation
to
under
different
cooling
times
explored,
well
distribution
at
certain
time.
results
show
that
time
increases,
bellow
decreases
significantly,
reduction
rate
accelerates,
degree
gradually
decreases.
When
is
900
s,
wave
peak
middle
position
relatively
small,
value
valley
along
axis
direction
does
not
change
significantly.
uniform.
Thin-Walled Structures,
Journal Year:
2023,
Volume and Issue:
193, P. 111234 - 111234
Published: Sept. 27, 2023
The
mechanical
behaviour
and
energy
absorption
(EA)
of
origami
bellows
with
polygonal
cross-sections
under
quasi-static
axial
tension
were
numerically
theoretically
investigated.
finite
element
analysis
results
showed
that
the
plateau
force
increased
number
polygon
sides
N,
leading
to
increases
in
mean
tensile
(Pm)
SEA.
Two
types
basic
deployment
elements
during
process
hexagonal
cross-section
defined
two
modes,
namely
non-rigid
mode
I
II.
exhibiting
II
had
approximately
60%
greater
SEA
Pm
than
those
I.
Theoretical
predictions
for
each
derived
based
on
a
rigid,
perfectly
plastic
material
superfolding
elements.
predicted
reasonable
agreement
terms
force–displacement
history
force.
This
work
reveals
fundamental
mechanics
involved
can
facilitate
design
optimized
geometric
parameters
desired
EA
behaviour.
