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Processing and Characterization of PETI Composites Fabricated by High Temperature VARTMThe use of composites as primary structures on aerospace vehicles has increased dramatically over the past decade. As these advanced structures increase in size and complexity, their production costs have grown significantly. A major contributor to these manufacturing costs is the requirement of elevated processing pressures, during the thermal cure, to create fully consolidated composites. For certain composite parts, high temperature vacuum assisted resin transfer molding (HT-VARTM) can offer reduced fabrication costs compared to conventional autoclave techniques. The process has been successfully used with phenylethynyl terminated imide (PETI) resins developed by NASA LaRC. In the current study, two PETI resins, LARC(TradeMark) PETI-330 and LARC(TradeMark) PETI-8 have been used to make test specimens using HT-VARTM. Based on previous work at NASA LaRC, larger panels with a quasi-isotropic lay-up were fabricated. The resultant composite specimens exhibited void contents <3% by volume depending on the type of carbon fabric preform used. Mechanical properties of the panels were determined at both room and elevated temperatures. These included open-hole compressive (OHC) and short beam shear (SBS) properties. Limited process modeling efforts were carried out including infusion times, composite panel size limitations and fabric permeability characterization. Work has also been carried out to develop new PETI based resins specifically geared towards HT-VARTM. The results of this work are presented herein.
Document ID
20110012161
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Ghose, Sayata
(National Inst. of Aerospace Hampton, VA, United States)
Cano, Roberto J.
(NASA Langley Research Center Hampton, VA, United States)
Watson, Kent A.
(National Inst. of Aerospace Hampton, VA, United States)
Britton, Sean M.
(NASA Langley Research Center Hampton, VA, United States)
Jensen, Brian J.
(NASA Langley Research Center Hampton, VA, United States)
Connell, John W.
(NASA Langley Research Center Hampton, VA, United States)
Smith, Joseph G.
(NASA Langley Research Center Hampton, VA, United States)
Loos, Alfred C.
(Michigan State Univ. East Lansing, MI, United States)
Heider, Dirk
(Delaware Univ. Newark, DE, United States)
Date Acquired
August 25, 2013
Publication Date
May 23, 2011
Subject Category
Composite Materials
Report/Patent Number
NF1676L-11378
Meeting Information
Meeting: SAMPE 2011 Conference and Exhibition
Location: Long Beach, CA
Country: United States
Start Date: May 23, 2011
End Date: May 26, 2011
Sponsors: Society for Advancement of Materials and Process Engineering
Funding Number(s)
WBS: WBS 984754.02.07.07.15.03
Distribution Limits
Public
Copyright
Public Use Permitted.
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