Manufacturing of damping composite laminates with aeronautical prepreg and elastomeric interlayer

• DOI: 10.1177/09544062251328544
• Publication Date: 2025-03-31T05:20:18Z
• Authors: Loredana Santo; Leandro Iorio; Fabrizio Quadrini; Daniele Santoro; Lorenzo Consolini

Damping composite laminates have been produced by compression molding of commercial thermosetting carbon fiber reinforced prepregs with different interlayers. A double-stage experimental campaign was implemented to select optimal candidates for these interlayers improve laminate damping. In the first stage, dynamic mechanical analysis (DMA) carried out on inert, thermoplastic and materials. Measured loss factors ranged between 0.06 0.34. DMA bending tests were also small size using those as core sandwiches. After incorporation in sandwich structures, factor values reduced down 60%, but improvement comparison neat always remarkable (from 16 19 times). By combining damping performances composites manufacturability, only rubber selected second stage when five samples manufactured bigger size, tested under loading. Because interlayer, apparent modulus strongly decreased, 11 times, whereas stiffness remained about 50% average. Nevertheless, results from free vibrations show that reduce, average, their maximum acceleration.