Multi-Material 3D Plate Lattice Structures Using Fused Filament Fabrication Technique

Plate lattice structures are a type of cellular solids made from three-dimensional intersections of plates to achieve theoretical upper bounds on the stiffness and strength at low densities. Manufacturing such structures can be complex and requires careful selection of materials to achieve the desired properties. In this work, we present multi-material plate lattices with at least one material composed of carbon fiber reinforced thermoplastic composite. The multi-material configuration enhances mechanical properties without compromising the density. A fused filament fabrication technique was used to fabricate the unit cell of the plate lattice. Material such as polyethylene terephthalate glycol (PETG) and carbon fiber-reinforced polyethylene terephthalate (PET-CF) were used. Different material configurations were investigated on the elementary body centered cubic (BCC) structures. The results of this study offer promising opportunities for lightweight and high-strength applications.