Title: Advances in The Development of Stretch Broken Carbon Fiber for Primary Aircraft Structure
Authors: Chris Ridgard, Doug S. Cairns, Eric Booth
Abstract: Stretch broken carbon fiber (SBCF) composites offer significant benefits over conventional continuous fiber composites. These include the greatly enhanced formability of unidirectional tape form products prior to cure without any compromise on the mechanical performance after curing and with the potential to replace corrosion and weight penalty-prone metallic solutions, which are commonly used for the internal substructure of military and other aircraft structures. The SBCF material allows more complex shapes to be made from composites. The recent work performed under the US Army funded Stretch Broken Carbon Fiber for Primary Aircraft Structure program by Montana State University is reviewed, along with the results achieved by previous efforts to develop this technology. The achievement of shorter stretch break lengths to improve formability is a principal objective of the work and a successful achievement of the recent efforts. In addition, alternate means of manufacturing SBCF prepregs are discussed, including conventional spooled fiber presentation suitable for running on current prepregging equipment, as well as a newly developed direct to prepreg approach, where the stretch breaking of the fibers is done in-line with the prepregging process. While aerospace primary structure has been the focus of current research efforts, applications in other industries such as automotive are also obvious areas of applications for SBCF technology.
References: 1. Abdallah, M. at. al, “Development of Stretch Broken Carbon Fiber (SBCF) Materials”, 2005 International SAMPE Symposium, Long Beach CA. 2. Dillon, G.P. & Waldzyk, D., “Comparison of Continuous Fiber and Stretch Broken Carbon Fiber (SBCF) Materials in Forming Processes”, 2005 International SAMPE Symposium, Long Beach CA. 3. Dillon, G.P. & Barsoum, M., “Characterization of Stretch Broken Carbon Fiber Materials for Automated Forming Processes”, 2005 International SAMPE Symposium, Long Beach CA. 4. Ng, S.J. et. al, “Characterization of Stretched Broken Carbon Fiber (SBCF) Material Forms”, 2005 International SAMPE Symposium, Long Beach CA. 5. Tasnia Javin Nur: Novel experimental unit to evaluate inter-ply and tool-ply friction in carbon fiber reinforced polymer composites prepregs, CAMX Anaheim CA, October 2022 6. Yoni Shchemelinin: Bulge and dome testing to investigate the formability of continuous and stretch broken carbon fiber prepreg laminates, CAMX Anaheim CA, October 2022 7. Dalton Nold: Tensile Properties of Stretch Broken Carbon Fiber Prepreg, CAMX Anaheim CA, October 2022 8. Matthew Egloff: A Predictive Forming Model for Stretch-Broken Carbon Fiber Composites as a Function of State of Stress, Forming Rate, and Resin Viscosity, CAMX Anaheim CA, October 2022 9. Riad Morshed Rezaul: Effect of process variables on the uncured handleability and formability of stretch broken carbon fiber, CAMX Anaheim CA, October 2022
Conference: CAMX 2022
Publication Date: 2022/10/17
Price: $18.00Get This Paper