Multi-material Fibers for Functionality Integration in Advanced Composite Technologies - FINACT
Abstract
This project explores the introduction of multi-material functional fibers (F-fibers) into continuous fiber thermoplastic composites (TPCs) produced by additive manufacturing (AM) and advanced fiber placement (AFP). The objective is to combine structure (via carbon fiber) with increased functionality (via multi-material F-fibers) for light weight structural composite parts, tailored to aerospace, drones or other industrial applications in terms of mechanical behavior and sensing requirements. Functionalities that can be introduced include strain sensing, temperature and humidity measurement, and haptic functionalities at reduced system cost. F-fiber sensors are not currently available to suit automated integration into composites, and the part manufacturing processes are not adapted. TPCs rarely contain distributed sensors, as these may not survive the process heat and pressure regime, although fiber optic sensors have been successfully introduced. In addition, while the additive manufacturing of TPCs is in active development, multi-functional F-fibers have not yet been adapted to these processes in terms of integration methods, precision and connection. The project will thus focus on the development of an adapted multi-functional drawn fiber, which can survive AFP and FDM process temperature and pressure regimes, which bonds well to the composite structure, while minimizing any detrimental effects on composite mechanical properties. This requires the development of suitable material combinations, with adapted rheological properties, to thermally draw these F-fiber sensors. In parallel, we aim to demonstrate multi material additively manufactured TPC parts where strain, local pressure, and temperature can be measured. For this, industrially relevant AFP and FDM equipment will be adapted in collaboration with the machine producers, first with lower temperature systems, then with the thermoplastic material. Particular attention will also be placed to fiber placement and connection. With the adaptation of the F-fibers to suit 3D printing processing requirements the door will be opened to direct, automated and precise integration into composite parts which has not previously been achieved.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 22, 2024
- Source ID
- FA86552317067
Entities
People
- Veronique Michaud
Organizations
- Air Force Office of Scientific Research
- Swiss Federal Institute of Technology in Lausanne
- United States Air Force