Physical Review Letters,
Год журнала:
2024,
Номер
132(10)
Опубликована: Март 7, 2024
We
find
a
closed-form
expression
for
the
Poisson's
coefficient
of
curved-crease
variants
``Miura
ori''
origami
tessellation.
This
is
done
by
explicitly
constructing
continuous
one-parameter
family
isometric
piecewise-smooth
surfaces
that
describes
action
folding
out
reference
state.
The
response
tessellations
in
bending
investigated
as
well:
using
numerical
convergence
scheme,
effective
normal
curvatures
under
infinitesimal
are
found
to
occur
ratio
equal
and
opposite
coefficient.
These
results
first
their
kind
and,
simplicity,
should
provide
fruitful
benchmark
design
modeling
compliant
shell
mechanisms.
developed
methods
used
3D
morphing
solid
with
tunable
self-locked
International Journal of Mechanical Sciences,
Год журнала:
2024,
Номер
270, С. 109091 - 109091
Опубликована: Фев. 7, 2024
Hexagonal
perforated
honeycomb
(HPH)
metamaterials
were
designed,
fabricated
and
investigated
in
this
work.
Initially,
the
mechanical
properties
deformation
modes
of
various
proposed
HPH
(HPH-U,
HPH-1L
HPH-3L)
under
quasi-static
vertical
compression
analyzed
using
experimental
finite
element
methods.
The
findings
reveal
significant
improvements
energy
absorption
due
to
hierarchical
expandable
design.
Notably,
auxetic
effect
is
diminished.
Subsequently,
impact
key
dimensional
parameters
on
Poisson's
ratio
behavior
was
explored.
results
highlighted
that
an
increase
elliptical
perforation
major
axis
minor
enhanced
but
compromised
load-bearing
absorptive
capacity.
Additionally,
displayed
exceptional
performance
horizontal
compression,
with
their
structure
enabling
them
withstand
both
impacts
while
exhibiting
excellent
capabilities.
study
also
identified
relative
density
as
a
crucial
factor
influencing
performance.
Finally,
subjected
multiple
repetitive
compressions,
meticulously
analyzing
variations
diverse
ratios.
Due
distinctive
structural
design
impressive
properties,
demonstrate
immense
potential
for
applications
automotive
engineering
sports
protection
fields.
