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Advanced in In Situ Inspection of Automated Fiber Placement SystemsAutomated Fiber Placement (AFP) systems have been developed to help take advantage of the tailorability of composite structures in aerospace applications. AFP systems allow the repeatable placement of uncured, spool fed, preimpregnated carbon fiber tape (tows) onto substrates in desired thicknesses and orientations. This automated process can incur defects, such as overlapping tow lines, which can severely undermine the structural integrity of the part. Current defect detection and abatement methods are very labor intensive, and still mostly rely on human manual inspection. Proposed is a thermographic in situ inspection technique which monitors tow placement with an on board thermal camera using the preheated substrate as a through transmission heat source. An investigation of the concept is conducted, and preliminary laboratory results are presented. Also included will be a brief overview of other emerging technologies that tackle the same issue. Keywords: Automated Fiber Placement, Manufacturing defects, Thermography
Document ID
20160009052
Document Type
Conference Paper
Authors
Juarez, Peter D. (NASA Langley Research Center Hampton, VA, United States)
Cramer, K. Elliott (NASA Langley Research Center Hampton, VA, United States)
Seebo, Jeffrey P. (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Date Acquired
July 15, 2016
Publication Date
April 17, 2016
Subject Category
Composite Materials
Report/Patent Number
NF1676L-22637
Meeting Information
SPIE 2016 Thermosense Conference(Baltimore, MD)
Funding Number(s)
WBS: WBS 826611.04.07.02
Distribution Limits
Public
Copyright
Public Use Permitted.

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