Title: Effect of Tailored Fiber Placement Threads on Carbon/Epoxy Composite Impact Resistance

Authors: Marie-Claude Bélanger, Patricia Forcier, Yohan Gendreau, Alain Bujold, Simon Pesant, Serge Pagé, and Louis Laberge-Lebel

DOI: 10.33599/nasampe/c.19.0666

Abstract: Tailored fiber placement (TFP) enables the production of net shaped preforms that maximize performance-to-weight in composite parts. TFP places reinforcement strands, layer-by-layer, on a carrier substrate. The strands are stitched as they are located by a stitching thread. The stitching thread is therefore oriented in-plane and through-thickness. A few studies investigate the effect of TFP threads on mechanical properties. In this study, the strengthening potential of carbon fiber preform made by TFP was studied, specifically its impact and shear properties. Three types of stitching threads and six laminate configurations were compared. Preforms were then impregnated to produce carbon/epoxy flat parts. In-plane shear testing and impact testing were performed following ASTM Standards. The damage size and depth was evaluated by infrared thermography. Compressive residual strength was then measured per ASTM Standard. Results were compared to a stitchless baseline configuration. It was found that TFP using Kevlar® thread provides a 10 % higher impact resistance versus polyester thread and have a better impact resistance than the baseline configuration. Also, using Kevlar® thread TFP increases the resistance to delamination by 38 %. However, the in-plane shear strength was reduced by 24 %.

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Conference: CAMX 2019

Publication Date: 2019/09/23

SKU: TP19-0666

Pages: 13

Price: $26.00