Riccardo Piani
Crashworthiness performances of an innovative cylindrical carbon fiber composite employing advanced fiber textile architectures.
Rel. Enrico Cestino, Giacomo Frulla, Alessandro Polla. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Aerospaziale, 2024
Abstract
The following Master Thesis presents an experimental investigation into the crashworthiness performance of an innovative tri-axial braided Carbon Fiber Reinforced Composite (CFRC) cylinder under dynamic crushing loading. Two different test methods were employed, a drop tower test rig and a Very High-Speed (VHS) machine test, using both flat and conical impactors. The specimens were manufactured via a novel resin infusion process directly onto the mandrel utilized for the braided process, avoiding any dry fiber damage. The Specific Energy Absorption (SEA), peak load, steady-state crushing load, and Crushing Efficiency (CE) were evaluated and compared against literature data for each test configuration. The tri-axial braided architecture and the unidirectional stacked ply architecture have been compared to understand the possible differences under crashworthy performance and the different fracture mechanisms that characterize the phenomenon.
It has been proven that braided shows a fracture mechanic where biaxial fiber breaking, and 0 degrees fiber kinking are highly emphasized
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