This paper presents data from an innovative nondestructive evaluation (NDE) method for automated composite fiber placement fabrication. Using Infrared images of the fiber, as it was being placed, we are able to provide valuable information about the quality of the part during fabrication. Herein, we discuss the methodology for data collection and processing. The described in situ thermal NDE process is found to be applicable for identifying fiber tow overlaps, gaps, twists, puckering, and poor ply adhesion prior to cure, thereby reducing the time and cost associated with post cure flaw repair or scrapping parts. This paper also describes the process of assembling data sets for an entire part beyond simple frame by frame analysis. Example data sets for both a flat part and a larger cylindrical part are presented to demonstrate the type of defect characterization information that can be obtained.
In Situ Thermal Nondestructive Evaluation for Assessing Part Quality During Composite Automated Fiber Placement
Manuscript received January 26, 2018; final manuscript received July 2, 2018; published online August 16, 2018. Assoc. Editor: Mark Derriso.This material is declared a work of the U.S. Government and is not subject to copyright protection in the United States. Approved for public release; distribution is unlimited.
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Gregory, E., and Juarez, P. (August 16, 2018). "In Situ Thermal Nondestructive Evaluation for Assessing Part Quality During Composite Automated Fiber Placement." ASME. ASME J Nondestructive Evaluation. November 2018; 1(4): 041007. https://doi.org/10.1115/1.4040764
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