Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: July 21, 2023
Volumetric
additive
manufacturing
techniques
are
a
promising
pathway
to
ultra-rapid
light-based
3D
fabrication.
Their
widespread
adoption,
however,
demands
significant
improvement
in
print
fidelity.
Currently,
volumetric
prints
suffer
from
systematic
undercuring
of
fine
features,
making
it
impossible
objects
containing
wide
range
feature
sizes,
precluding
effective
adoption
many
applications.
Here,
we
uncover
the
reason
for
this
limitation:
light
dose
spread
resin
due
chemical
diffusion
and
optical
blurring,
which
becomes
features
⪅0.5
mm.
We
develop
model
that
quantitatively
predicts
variation
time
with
size
demonstrate
deconvolution
method
correct
error.
This
enables
previously
beyond
capabilities
manufacturing,
such
as
complex
gyroid
structure
variable
thickness
fine-toothed
gear.
These
results
position
mature
printing
method,
all
but
eliminating
gap
industry-standard
Thin-Walled Structures,
Journal Year:
2023,
Volume and Issue:
186, P. 110650 - 110650
Published: March 16, 2023
Auxetic
lattices
have
attracted
increasing
attention
due
to
their
unusual
mechanical
behavior
and
potential
for
an
array
of
applications.
However,
a
narrow
window
stiffness
realizable
given
cell
topology
limits
In
this
study,
pair
novel
2D
re-entrant
auxetic
capable
exhibiting
enhanced
energy
absorption
is
proposed
by
introducing
vertical
ligaments
into
conventional
structures.
These
modified
were
realized
via
fused
deposition
additive
manufacturing.
The
deformation
patterns
the
characteristics
3D
printed
under
quasi-static
compression
investigated
both
Finite
Element
(FE)
simulations
experiments.
effective
elastic
was
theoretically
estimated.
FE
results
corroborated
experiments,
elucidate
role
different
sub-cells
on
properties
lattices.
indicate
that
structures
—
Type
A
B
variants,
exhibit
(+355%)
superior
(+165%)
in
comparison
same
mass.
Furthermore,
findings
study
suggest
strength,
stiffness,
capacity
Poisson's
ratio
can
be
tailored
tuning
sub-cell
wall
thickness.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: July 21, 2023
Volumetric
additive
manufacturing
techniques
are
a
promising
pathway
to
ultra-rapid
light-based
3D
fabrication.
Their
widespread
adoption,
however,
demands
significant
improvement
in
print
fidelity.
Currently,
volumetric
prints
suffer
from
systematic
undercuring
of
fine
features,
making
it
impossible
objects
containing
wide
range
feature
sizes,
precluding
effective
adoption
many
applications.
Here,
we
uncover
the
reason
for
this
limitation:
light
dose
spread
resin
due
chemical
diffusion
and
optical
blurring,
which
becomes
features
⪅0.5
mm.
We
develop
model
that
quantitatively
predicts
variation
time
with
size
demonstrate
deconvolution
method
correct
error.
This
enables
previously
beyond
capabilities
manufacturing,
such
as
complex
gyroid
structure
variable
thickness
fine-toothed
gear.
These
results
position
mature
printing
method,
all
but
eliminating
gap
industry-standard
