NDLI: Laser surface preparation for adhesive bonding of aerospace structural composites

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Laser surface preparation for adhesive bonding of aerospace structural composites

Content Provider	NASA Technical Reports Server (NTRS)
Author	Belcher, M. A. Hopkins, J. W. Connell, J. W. Wohl, C. J.
Copyright Year	2010
Description	Adhesive bonds are critical to the integrity of built-up structures. Disbonds can often be detected but the strength of adhesion between surfaces in contact is not obtainable without destructive testing. Typically the number one problem in a bonded structure is surface contamination, and by extension, surface preparation. Standard surface preparation techniques, including grit blasting, manual abrasion, and peel ply, are not ideal because of variations in their application. Etching of carbon fiber reinforced plastic (CFRP) panels using a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser appears to be a highly precise and promising way to both clean a composite surface prior to bonding and provide a bond-promoting patterned surface akin to peel ply without the inherent drawbacks from the same (i.e., debris and curvature). CFRP surfaces prepared using laser patterns conducive to adhesive bonding were compared to typical pre-bonding surface treatments through optical microscopy, contact angle goniometry, and post-bonding mechanical testing.
File Size	822859
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20100024309
Archival Resource Key	ark:/13960/t5k985n5k
Language	English
Publisher Date	2010-06-07
Access Restriction	Open
Subject Keyword	Composite Materials Panels Yag Lasers Bonded Joints Etching Adhesive Bonding Carbon Fiber Reinforced Plastics Adhesion Surface Treatment Destructive Tests Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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