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Supersonic Retropulsion Surface Preparation of Carbon Fiber Reinforced Epoxy Composites for Adhesive BondingSurface preparation is widely recognized as a key step to producing robust and predictable bonds in a precise and reproducible manner. Standard surface preparation techniques, including grit blasting, manual abrasion, and peel ply, can lack precision and reproducibility, which can lead to variation in surface properties and subsequent bonding performance. The use of a laser to ablate composite surface resin can provide an efficient, precise, and reproducible means of preparing composite surfaces for adhesive bonding. Advantages include elimination of physical waste (i.e., grit media and sacrificial peel ply layers that ultimately require disposal), reduction in process variability due to increased precision (e.g. increased reproducibility), and automation of surface preparation, all of which improve reliability and process control. This paper describes a Nd:YAG laser surface preparation technique for composite substrates and the mechanical performance and failure modes of bonded laminates thus prepared. Additionally, bonded specimens were aged in a hot, wet environment for approximately one year and subsequently mechanically tested. The results of a one year hygrothermal aging study will be presented.
Document ID
20130013699
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Palmieri, Frank L.
(NASA Langley Research Center Hampton, VA, United States)
Belcher, Marcus A.
(Boeing Co. Seattle, WA, United States)
Wohl, Christopher J.
(NASA Langley Research Center Hampton, VA, United States)
Blohowiak, Kay Y.
(Boeing Co. Seattle, WA, United States)
Connell, John W.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 27, 2013
Publication Date
May 6, 2013
Subject Category
Nonmetallic Materials
Report/Patent Number
NF1676L-15433
Meeting Information
Meeting: SAMPE 2013
Location: Long Beach, CA
Country: United States
Start Date: May 6, 2013
End Date: May 9, 2013
Sponsors: Society for the Advancement of Materials and Process Engineering
Funding Number(s)
WBS: WBS 284848.02.04.07.03
Distribution Limits
Public
Copyright
Public Use Permitted.
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