Title: Comparison of Tool-Ply Slippage Characteristics of Continuous vs Stretch Broken Carbon Fiber Prepreg

Authors: Tasnia J. Nur, Fischer Ossa-Mechels, Cecily Ryan, Dilpreet Bajwa, Roberta Amendola, Chris Ridgard, Doug Cairns

DOI: 10.33599/nasampe/s.24.0255

Abstract: There are three dominant deformation mechanisms that can take place during forming of multi layered uncured composite prepreg – inter-ply shear deformation, tool-laminate slippage and membrane stretching. Only Stretch broken fibers enable in-plane formability since continuous fiber laminates are inextensible in-plane due to very low strain to failure. Hence replacing continuous fibers with stretch broken fibers during manufacturing of composite aircraft structures has the potential to improve formability to form parts with complex geometric features with equivalent mechanical properties to that of continuous carbon fibers. At Montana state university, stretch broken carbon fibers (SBCF) are being manufactured and experiments are being conducted using a novel pull through fixture developed for the research to evaluate and differentiate frictional (tool-ply slippage) and non-frictional (membrane stretching) characteristic properties of MSU made SBCF impregnated with Solvay CYCOM® 977-3 epoxy resin system. The ongoing research has shown that test parameters (e.g. temperature, normal pressure) as well as material and manufacturing parameters (e.g. fiber lay-up and resin properties) all have influence on the slippage and stretching behavior of the material. Qualitative and quantitative analyses are being performed in order to explain some complex material behavior during experimentation. Most recent results and analyses will be presented and discussed.

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Conference: SAMPE 2024

Publication Date: 2024/05/20

SKU: TP24-0000000255

Pages: 10

Price: $20.00