Please consider attending the following:
MATERIALS ENGINEERING
“Tow Steering of Composite Prepregs During Automated Fiber
Placement”
By
Jose Alfredo Ocegueda Barraza
Purdue MSE Preliminary Exam
Advisor: Professor R. Byron Pipes
ABSTRACT
The
enhancement of
strength in
composite parts
is feasible
through local
reinforcement. Automated tape laying is a manufacturing technique that allows the placement of
fibers matching the path,
where the
load may
traverse the
structure, by
tow steering.
The purpose
of the
present work is
to present
an insight
into the
steering of
Carbon Fiber
Reinforced Polymers
(CFRP) pre- impregnated
tapes during
automated tape
placement. Defects
such as
wrinkles, folding,
blisters, gaps, and
overlaps are
developed during
the process.
The effects
of temperature,
consolidation pressure, the
tension on
the tape,
and laying
speed on
the formation
of defects
are discussed.
The minimum radius
of curvature
without the
presence of
defects during
tow steering
is limited
by the stress
state developed
during deposition,
as fibers
cannot stretch
to fit
specific paths.
Existing approaches to
estimate and
mitigate such
defects are
reviewed, along
with the
remaining challenges associated with this research field.
Date: Thursday, January 16, 2020
Time: 2:00 P.M.
Place: HAMP 3144