Journal of Applied Mechanics,
Год журнала:
2024,
Номер
92(1)
Опубликована: Ноя. 1, 2024
Abstract
Deployable
structures
are
extensively
used
in
engineering.
A
bistable
panel
structure,
inspired
by
multistable
origami,
is
proposed,
capable
of
deployment
and
folding
powered
air
pressure.
Prototypes
were
manufactured
using
planar
laser
etching
technology
based
on
geometric
design.
Mechanical
behavior
under
out-of-plane
compression,
in-plane
bending
loads
was
analyzed
through
experiments.
The
foldable
showed
superior
mechanical
performance
highlighting
its
potential
as
an
ideal
energy-absorbing
material.
In-plane
compression
along
the
direction
exhibited
lower
strength
due
to
foldability,
with
failure
modes
involving
rigidity
loss
from
folding.
structure
demonstrated
good
energy
absorption
characteristics
during
compression.
As
angle
unit
increased
bending,
improved,
but
mode
shifted
fracture.
In
perpendicular
direction,
enhanced,
failed
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 26, 2025
Abstract
Auxetic
metamaterials
refer
to
materials
and
structures
with
extraordinary
deformation,
i.e.,
transverse
expansion
(contraction)
under
uniaxial
tension
(compression).
In
recent
decades,
a
very
wide
range
of
innovative
functional
performance
has
been
discovered
stemming
from
this
behavior.
This
desirable
exhibition
adaptivity,
programmability,
functionality
provides
great
potential
in
soft
intelligent
systems.
However,
thus
far,
the
mainstream
research
on
auxetic
focused
subjective
design,
monotonic
mechanical
properties,
passive
tunability.
review
thorough
overview
classical
properties
applications,
primary
objective
proposing
new
roadmap
auxetics
for
advances
interdisciplinary
field.
The
fundamental
works
are
categorized
different
configurations
mechanisms.
particular,
integration
shape
morphing,
actuation,
sensing,
multiphysical
response,
inverse
design
is
reviewed
detail.
To
accelerate
development
smart
structural
systems,
applications
generalized
into
robotics
(outside
body),
human–machine
interaction
(surrounding
healthcare
devices
(inside
body).
Finally,
several
significant
topics
emphasized
theory,
material
choice,
manufacturing
technique,
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 26, 2025
Abstract
Multistable
architected
materials
are
proposed
as
promising
candidates
for
shock
absorption,
wave
guiding,
and
shape
transformation.
However,
current
design
strategies
typically
rely
on
one‐off
unit
cell
designs
with
limited
stable
states,
arranged
in
periodic
tessellations.
In
this
study,
a
systematic
approach
is
presented
designing
planar
multistable
kirigami
metamaterials.
This
method
based
bistable
triangular
building
block,
along
set
of
compatibility
rules
that
enable
the
creation
both
aperiodic
Guided
by
an
analytical
model
captures
nonlinear
behavior
we
successfully
fabricate
test
diverse
range
Furthermore,
emergent
resetting
deployed
structures
under
random
actuation
demonstrated,
generalization
to
3D
proposed.
work
establishes
versatile
platform
resettable
architectures
capable
extreme
mechanical
deformations.
Physical Review Letters,
Год журнала:
2025,
Номер
134(17)
Опубликована: Май 2, 2025
Kirigami
metamaterials
have
enabled
a
plethora
of
morphing
patterns
across
art
and
engineering.
However,
the
inverse
design
kirigami
for
complex
shapes
remains
puzzle
that
so
far
cannot
be
solved
without
relying
on
numerical
methods.
Here,
we
present
purely
geometric
method
to
overcome
reliance
sophisticated
algorithms
showcase
how
leverage
it
three
distinct
types
targets,
i.e.,
contracted
shape,
deployed
internal
trajectories
rotating
units
in
specimens.
Our
results
unveil
fundamental
relations
between
deformation
shape
its
enable
us
establish
underpinning
physics
through
theoretical
investigations
validated
via
simulations.
This
work
brings
ground-rule
insights
into
matter
with
offers
an
intuitive,
firsthand
route
swift
kirigami.
Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences,
Год журнала:
2024,
Номер
382(2283)
Опубликована: Окт. 7, 2024
We
explore
a
new
design
strategy
of
leveraging
kinematic
bifurcation
in
creating
origami/kirigami-based
three-dimensional
(3D)
hierarchical,
reconfigurable,
mechanical
metamaterials
with
tunable
responses.
start
from
constructing
three
basic,
thick,
panel-based
structural
units
composed
4,
6
and
8
rigidly
rotatable
cubes
close-looped
connections.
They
are
modelled,
respectively,
as
4R,
6R
8R
(R
stands
for
revolute
joint)
spatial
looped
mechanisms,
used
to
create
library
reconfigurable
hierarchical
building
blocks
that
exhibit
bifurcations.
analytically
investigate
their
reconfiguration
kinematics
predict
the
occurrence
locations
bifurcations
through
trial-correction
modelling
method.
These
tessellated
3D
various
bifurcated
preserve
reconfigure
into
different
architectures.
By
combining
considering
elastic
torsional
energy
stored
folds,
we
develop
geometric
mechanics
anisotropic
Poisson’s
ratios
stiffnesses.
find
can
significantly
effect
responses,
including
changing
sign
negative
positive
beyond
bifurcation,
tuning
anisotropy,
overcoming
polarity
stiffness
enhancing
number
deformation
paths
more
reconfigured
shapes.
This
article
is
part
theme
issue
‘Origami/Kirigami-inspired
structures:
fundamentals
applications’.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 19, 2024
Abstract
Mechanical
metamaterials
have
considerable
application
potential,
but
are
often
limited
to
single
applications
owing
material
and
manufacturing
constraints.
To
achieve
a
“single
structure,
multiple
applications”
goal,
this
study
presents
multifunctional
metamaterial
structure.
The
cells
gain
significant
deformation
recovery
abilities
by
incorporating
the
concept
of
tensegrity
structure
balance
flexibility
rigidity
using
rigid‐flexible
fabrication
process.
Inspired
cat‐tongue
barbs
Hooke's
law,
an
innovative
pre‐stress
programming
is
designed
for
integrated
fabrication,
enabling
multilevel
control
each
cell.
This
programmable
stress
allows
twin‐cell
array
transition
in
situ
from
monostable
bistable
states
provides
critical‐force
functions
states.
After
assembling
nine‐cell
array,
offers
wide
range
adjustable
stiffness
levels,
soft‐rigid
transitions
varied
force‐displacement
responses
without
need
additional
tools.
It
also
controlled
collapse
ratios
through
control.
Additionally,
features
isotropy
with
Poisson
ratio
v
=
−1
clear
indentation
resistance.
approach
promising
such
as
energy
dissipators,
automotive
equipment,
passive
safety.
Metamaterial
produced
via
concept.
Using
barb‐shaped
locking
structures
adjust
elastomer
length
(
x
n
).
Modulating
adjacent
achieves
multistability
adjustability.
controllable
resistance,
variable
response,
stiffness,
deformation.
