SAMPE Journal - July/August 2016 - 58

Feature Article

Figure 9. Comparison in mechanical
properties for interlayer toughened
prepreg system between
Quickstep vs. VBO and autoclave.

3. Hughes, J. "Studies for the Development of
OOA Prepregs used in Aircraft Applications." SAMPE
Technical Conference. Fort Worth, TX (2011).
4. Bray,
G.
"Composite
Component
Production Using Fluid Density and Pressure."
US20080211145A1 (2008).
Conclusions
The non-interlayer toughened aerospace grade
prepreg was well suited for the Quickstep process
achieving about 1 hr total molding cycle time,
less than 1% averaged void content, and proved
equivalency in mechanical performance to VBO
and autoclave processes. The interlayer toughened
system, on the other hand, achieved about 4.5
hr total molding cycle time with an averaged void
content improved to about 2% with fast ramp rates.
It also exhibited equivalent mechanical performance
to the other processing methods.
Future work for the non-interlayer toughened
system would consist of optimizing processing
conditions a step further for less than 0.5 hr cycle
time while maintaining an averaged void content of
less than 1%. To further reduce void content in the
interlayer toughened system, further exploration of
the higher fluid pressure is needed. Alternatively,
other rapid OOA processing methods which can
introduce higher compaction pressures may be
required.
References
1. Gardiner, G. "Out-of-Autoclave Prepregs: Hype
or Revolution?" High Performance Composites January
2011.
2. Hou, T-H, Miller, S.G., Williams, T. & Sutter, J.
"Out-of-Autoclave Processing and Properties of
Bismaleimide Composites." J. Reinforced Plastics and
Composites 33 (2) (2014): 137-49.
58

5. Brosius, D., Luedtke B., Law H., Tiam S. &
Odagiri, N. "Quickstep Processing of an AGATE
Qualified Carbon Epoxy Prepreg." SAMPE Fall Technical
Conference. Dallas, Texas (2006).
6. Brosius, D. & Luedtke B. "A Rapid Heating
process for Out-of-Autoclave Curing of Toughened
Epoxy Prepregs." SAMPE Technical Conference. Wichita,
Kansas (2013).
7. Japanese Industrial Standard JIS K 7086,
1993, "Testing Methods for Interlaminar Fracture
Toughness of Carbon Fiber Reinforced Plastics"
Japanese Standards Association, Minato-ku, Tokyo,
Japan, 1993, www.jsa.or.jp.
8. ASTM Standard D7137/ D7137M-12, 2012,
"Standard Test Method for Compressive Residual
Strength Properties of Damaged Polymer
Matrix Composite Plates" ASTM International, West
Conshohocken, PA, 2012, DOI:10.1520/D7137_
D7137M-12, www.astm.org.
9. SACMA Recommended Method SRM 2R-94,
1994, "Test Method for Compression After Impact
Properties of Oriented Fiber-resin Composites"
Suppliers of Advanced Composite Materials Association,
Arlington, Virginia, 1994.
10. ASTM Standard D5528-13, 2013, "Standard
Practice for Mode I Interlaminar Fracture Toughness
of Unidirectional Fiber-Reinforced Polymer Matrix
Composites" ASTM International, West Conshohocken,
PA, 2013, DOI: 10.1520/D5528, www.astm.org.

SAMPE Journal, Volume 52, No. 4, July/August 2016


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Table of Contents for the Digital Edition of SAMPE Journal - July/August 2016

Contents
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