Penetration impact behaviour of innovative 3d printing onyx/glass composite samples

Among the several additive manufacturing techniques, Fused Filament Fabrication (FFF) is a 3d printing technique fast, handly and low-cost to produce complex-shaped parts easily and quickly. FFF adds material layer by layer, saving energy, costs, raw material costs and waste. Nevertheless, Among the recent papers, analysis is absent on the impact performance of 3D printed composites. The response to low-velocity impact events is a crucial issue for composite materials, for the operational reliability of the element that has experienced a great reduction of mechanical strength due to their anisotropic nature. However, there is a lack of knowledge, mainly about the impact behaviour of 3d printing composite materials, also considering that the main demand comes from the transportation field (automotive, aircraft, etc.), where the impact event is always possible. Thus, the aim of this research is to begin to fill the knowledge gap investigating the impact behaviour of specimens obtained by continuous fiber fabrication technique. Onyx and Nylon white filaments were used as matrices and glass fibres for reinforcement. The present paper deals with the manufacturing of composite material items obtained by the Markforged FFF technique. An innovative matrix of nylon and micro carbon fibre (ONYX) was used with and without glass filament as reinforcement. Low velocity impact tests at penetration were carried out to study the impact performance of the novel material and the effect of the reinforcement used.