Polymer Composites,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 23, 2024
Abstract
Origami
tube
(OT)
has
attracted
significant
attention
in
the
realm
of
thin‐walled
structures
owing
to
their
remarkable
energy‐absorption
capabilities.
Nevertheless,
deformation
modes,
particularly
buckling,
present
considerable
stability
challenges.
In
this
research,
we
introduce
a
novel
corrugated
structure
enhance
energy
absorption
and
stabilize
mode
OT.
The
origami
(COT)
was
manufactured
using
high‐specific
modulus,
high‐strength,
lightweight
short
carbon
fiber‐reinforced
nylon
via
3D
printing,
followed
by
axial
quasi‐static
compression
tests.
findings
demonstrate
that
incorporation
corrugations
COT
greatly
stabilizes
deformation,
boosting
21.3%
compared
OT
reducing
peak
crashworthiness
force
up
21.37%.
Finite
element
analysis
accurately
replicates
experimental
performance
COT,
affirming
feasibility
simulation.
Optimization
Non‐dominated
Sorting
Genetic
Algorithm
II
(NSGA‐II)
produced
Pareto
front,
revealing
trade‐offs
among
various
indicators
offering
flexible
design
approach
meet
diverse
requirements.
This
study
provides
valuable
insights
guidance
for
lightweight,
structures.
Highlights
effectively
significantly
improves
reduces
initial
multi‐objective
optimization
variety
solutions
different
needs.
Polymer Composites,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 1, 2024
Abstract
This
study
examines
the
effects
of
multilayering
in
sandwich
panel
composite
structures
with
different
corrugated
core
configurations
under
quasi‐static
indentation
loading.
The
panels
were
fabricated
using
woven
glass
fibers
and
epoxy
resin
via
Vacuum
Infusion
Process.
Experiments
conducted
two
hemispherical
cylindrical
indenters
a
diameter
20
mm
(ID
=
mm)
10
behavior
structure
terms
contact
force
fracture
mechanisms
for
corrugations
(square
butterfly)
investigated
ways
foam
without
foam.
experimental
results
demonstrate
that,
among
geometries
foam,
butterfly
cores
outperform
square
structural
strength,
maximum
force,
moment
energy
absorption,
specific
displacement
until
full
indentation.
Moreover,
shows
higher
peak
load
failure
compared
to
core.
Under
loading
indenter,
only
experienced
perforation
area,
completely.
Also,
adding
did
not
change
mechanical
geometry.
However,
geometry,
filled
gaps
between
core,
preventing
completely
leading
unlike
specimen
visual
analysis
during
process
revealed
several
significant
damage
mechanisms,
including
matrix
cracking,
fiber
breakage,
delamination,
buckling
crushing
cell
walls,
top
sheets,
separation,
complete
samples.
Highlights
Delamination
seen
on
Skin
rib
Butterfly
best
performance
without/with
shape
was
more
effective
strength
than
addition.
Polymer Composites,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 17, 2024
Abstract
Interpenetrating
phase
composites
(IPCs)
can
combine
the
advantages
of
each
component
and
have
a
good
application
prospect.
IPCs
were
prepared
by
combining
open‐cell
aluminum
foam
(AF)
epoxy
resin
(EP)
in
three‐dimensional
space
this
study.
Different
contents
silica
powder
(SP,
80,
100,
120,
140
wt%)
added
to
EP
improve
compressive
three‐point
bending
properties
IPCs.
In
test,
acoustic
emission
(AE)
was
applied
track
deformation
samples,
k
‐means
clustering
algorithm
identify
damage
modes.
The
increased
first
then
decreased
with
increase
SP
content,
reached
maximum
when
content
100
wt%,
yield
strength
74.6
MPa
peak
load
1.96
kN.
performance
degradation
mainly
attributed
AF/EP
debonding
due
distribution
at
interface.
X‐type
shear
band
EP/AF
appeared
compression
failures
AF
IPCs,
respectively.
AE
results
showed
that
under
load,
plastic
matrix
(60–200
kHz)
fracture
failure
(230–340
modes
AF,
while
(60–120
kHz),
(120–230
(230–250
Highlights
Silica
Acoustic
used
monitor
firstly.
classify
patterns.
Mechanics of Advanced Materials and Structures,
Год журнала:
2024,
Номер
unknown, С. 1 - 18
Опубликована: Ноя. 13, 2024
To
enhance
the
mechanical
properties
of
honeycomb
structures,
a
phenolic
foam
composite
meta-aramid
core
(PFAH)
was
developed.
Experimental,
simulation,
and
theoretical
analyses
revealed
that
PFAH
increased
out-of-plane
energy
absorption
by
89.47%
without
altering
specific
aramid
honeycomb,
maintaining
smooth
plastic
deformation.
At
150
°C,
it
retained
90.7%
properties.
In
in-plane
direction,
PF
raised
plateau
stress
798.73%.
The
study
identified
critical
spinodal
for
off-axis
angle
deformation
modes
established
relationship
between
strength
angle,
demonstrating
superior
resistance
to
shallow-angle
oblique
loading
compared
unfilled
honeycomb.
