Title: In-situ Characterization of Composite Ply-Movement and Manufacturing Defects

Authors: Sandeep Chava, and Sirish Namilae

DOI: 10.33599/nasampe/s.19.1483

Abstract: The ubiquitous usage of polymer matrix composites in aerospace, automobile, and other industries necessitates a comprehensive understanding of manufacturing defects such as delamination, debonding and wrinkling. Investigating the movement of ply interfaces during manufacturing will help understand the fundamental phenomenon that leads to the formation of processing-induced defects. In this paper, the interfacial movement in carbon fiber laminate is characterized in-situ during different stages of curing in a specially designed autoclave with viewports. Plies are laid-up on a cylindrical rod placed on a flat plate to simulate the maximum movement of plies, resulting in the formation of wrinkles. Ply-movement is measured in-situ using Digital Image Correlation (DIC) during the cure cycle. In addition, the resulting defects are characterized post cure using X-Ray Computed Tomography (CT). Preliminary results demonstrate the effectiveness of this approach in examining defects like wrinkles. Results show the formation of a wrinkle due to the out of plane ply movement (0.65 mm) and the evolution of the wrinkle through the curing cycle.

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Conference: SAMPE 2019 - Charlotte, NC

Publication Date: 2019/05/20

SKU: TP19--1483

Pages: 11

Price: FREE