Materials,
Год журнала:
2024,
Номер
17(17), С. 4407 - 4407
Опубликована: Сен. 6, 2024
This
article
addresses
manufacturing
structures
made
via
injection
molding
from
biodegradable
materials.
The
mentioned
can
be
successfully
used
as
energy-absorbing
liners
of
all
kinds
sports
helmets,
replacing
the
previously
expanded
polystyrene.
paper
is
focused
on
technological
tests
and
tensile
(in
quasi-static
dynamic
conditions)
several
composites
based
a
PLA
matrix
with
addition
other
softening
agents,
such
PBAT
TPS
(the
blends
were
prepared
melt
blending
using
screw
extruder
mass
compositions
50:50,
30:70,
15:85).
Tensile
showed
positive
strain
rate
sensitivity
mixtures
dependence
increase
in
ratio
to
static
yield
stress
share
plastic
component
mixture.
Technological
that
increasing
amount
plasticizing
additive
by
35%
(from
50%
85%)
results
decrease
minimal
thickness
thin-walled
element
molded
about
32%
case
PLA/PBAT
0.22
mm
0.15
mm)
26%
PLA/TPS
0.23
0.17
mm).
Next,
elements
(dimensions
55
×
20
manufactured
evaluated
spring-loaded
drop
hammer.
60
J
impact
energy
was
tested
accordance
EN
1078
standard.
crushing
test
included
checking
influence
materials'
temperature
(-20,
0,
20,
40
°C)
velocity.
It
proven
maximum
deflection
increases
material
an
PLA15PBAT85
blend
selected
most
effective
terms
its
use
liner
for
sport
helmets.
Johnson-Cook
Cowper-Symonds
models
constructed.
Their
during
FE
simulation
provided
good
agreement
those
conducted
experiment.
Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications,
Год журнала:
2022,
Номер
237(3), С. 503 - 542
Опубликована: Ноя. 14, 2022
The
biomimetic
approach
rapidly
evolves
for
designing
novel
lightweight
structures
and
has
been
expanding
in
engineering
design.
Additive
manufacturing
or
3D
printing
permits
three-dimensional
parts
to
be
fabricated
with
an
intricacy
quality
that
might
tough
impossible
appreciate
the
present
traditional
production
techniques.
With
probabilities
exactitude,
allows
bio-inspired
lattice
from
nature
are
hypothetically
advanced
ingest
excellent
energy
absorption
capacity
less
material.
combination
of
additive
cellular
architectures
offers
potential
design
options
regarding
material
utilization,
strength,
cost,
component
weight.
A
summary
recent
advances
improvement
is
outlined
this
review
paper.
Specifically,
exciting
highlights
remarkable
mechanical
properties
bones,
teeth,
dermal
layers
creatures
bio-mimicked
style
economical
absorbers.
Researchers
engineers
can
use
information
create
unique
designs
inspired
biologically
application
energy.
Biomimetics,
Год журнала:
2024,
Номер
9(9), С. 545 - 545
Опубликована: Сен. 9, 2024
Biological
structures
optimized
through
natural
selection
provide
valuable
insights
for
engineering
load-bearing
components.
This
paper
reviews
six
key
strategies
evolved
in
nature
efficient
mechanical
load
handling:
hierarchically
structured
composites,
cellular
structures,
functional
gradients,
hard
shell–soft
core
architectures,
form
follows
function,
and
robust
geometric
shapes.
The
also
discusses
recent
research
that
applies
these
to
design,
demonstrating
their
effectiveness
advancing
technical
solutions.
challenges
of
translating
nature’s
designs
into
applications
are
addressed,
with
a
focus
on
how
advancements
computational
methods,
particularly
artificial
intelligence,
accelerating
this
process.
need
further
development
innovative
material
characterization
techniques,
modeling
approaches
heterogeneous
media,
multi-criteria
structural
optimization
advanced
manufacturing
techniques
capable
achieving
enhanced
control
across
multiple
scales
is
underscored.
By
highlighting
holistic
approach
designing
components,
advocates
adopting
similarly
comprehensive
methodology
practices
shape
the
next
generation
Materials & Design,
Год журнала:
2022,
Номер
224, С. 111375 - 111375
Опубликована: Ноя. 13, 2022
The
laborious
work
of
post-processing
powder
removal
from
lattice
structures
made
by
polymer
powder-based
additive
manufacturing
(AM)
process
is
still
a
major
challenge
and
requires
in-depth
study.
Here,
novel
3D
honeycomb
shaped
structure
with
ventilated
holes
bio-inspired
polyhedral
plant
cells
has
been
designed
to
eliminate
entrapment
in
constricted
inter-cellular
regions
surface-based
structure.
ventilation
enables
cross
flow
within
the
structure,
resulting
easy
complete
entrapped
powder.
computational
fluid
dynamics
(CFD)
method
was
used
understand
paths
various
surface
based
structures.
An
experimental
setup
also
calculate
flowability
these
lattices.
Finite
Element
Analysis
(FEA)
compression
tests
were
done
benchmark
strength
newly
This
innovative
can
be
biomedical,
heat-exchanger,
food
drug
delivery
systems
light-weighting
applications.
