Fatigue resistant prosthetic feet realised by high strain composites

Research Project, 2021 – 2023

Purpose and goal: The project is based on a previous feasibility study with a new type of fiber composite. Extremely thin cut carbon fiber tapes in combination with epoxy matrix are used to improve the properties of the composite.
The mother-of-pearl-inspired material showed improved mechanical values both theoretically and in practical tests. The goal of the current project is to demonstrate improved fatigue properties. In addition, the project intends to implement the new material in an existing composite product; a foot prosthesis. Expected results and effects: The project intends to raise the TRL level of the newly developed composite material from ~4-5 to 7; the material tested in prototype under real operating conditions. Furthermore, production methods and quality-related processes are expected to be developed for the new material during the project. Fatigue is in many cases dimensioning for advanced composites. Through improved fatigue properties, the project intend to demonstrate increased material utilization and thus reduced material consumption, reduced material waste during production and a larger composite design space.