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Many composite materials, both natural and fabricated, process a Voronoi likearchitecture or microstructure. Furthermore, the stochasticity and connectivityof Voronoi tessellation endow the composite materials constructed by this kindof structures a wide range of desired properties including high and tuneablestiffness, high strength and good manufacturability. Thus, Voronoi-based fibrenetwork structures are regarded as promising designs of compositereinforcements, as well as powerful tools in composite mechanics simulations.In this paper, the elastic properties of composites reinforced by a 3D Voronoifibre network are systemically investigated based on the precise control of theVoronoi cell regularity. The regularity of the reinforcement fibre networks,according to our definition, is found positively related to the Young's moduliof the composites. Interestingly, 20% percent of defects in total reinforcementfibres only causes a less than 6.5% of Young's moduli drop in Voronoi fibrenetwork reinforced composite. The Voronoi fibre network reinforced compositesalso shows higher Young's moduli than those of conventional composites withdiscrete reinforcements. The possibility of simulating aerogels by Voronoifibre network structures are also presented.

The elastic properties of composites reinforced by a 3D Voronoi fibre network with or without missing fibres