Muhammad KhanAHMED SAMEER ABUSABIR2022-05-292022-05-29https://drepo.sdl.edu.sa/handle/20.500.14154/437293D Cellular solids are a state-of-the-art class of materials that have been gained attention due to their fascinating characteristics and behaviours. Recently, they have been widely used in engineering applications in the field of biomedical, aerospace, automotive industries, etc. Those engineering applications utilized 3D cellular solids to optimise their performance and gain interesting properties such as low-density, energy absorption, strength-to-weight ratio, noise reduction, damping performance, etc. However, the 3D cellular solids are different from natural foams and honeycombs. 3D cellular solids can be designed with specific geometry, dimensions, and material to tailor their properties to meet any application requirement. In this study, unique designs of 3D cellular solids will be developed and analysed. The focus will be on three designs derived from simple cubic atomic structures, which are Plate-based lattice, Truss-based lattice, and Shell-based lattice. The considered designs will be fabricated of PLA and ABS materials by the Fused Filament Fabrication process (FFF). Then, an experimental investigation will be conducted on the 3D printed specimens to understand their viscoelastic response and mechanical properties. The outcomes demonstrated that the geometry of 3D cellular solids has obvious influence on the mechanical properties and time-dependant behaviour. For example, Plate- based lattice has the most stiffness, while the greatest viscoelastic behaviour belongs to Shell-based lattice. Moreover, the properties of the utilized materials reflected on the overall characteristics of cellular solids.en