Effect of different auxetic cell design on the compression behavior of FDMed structures

Abstract

Abstract. Among the different additive manufacturing technologies for polymeric materials, Fused Deposition Modelling has obtained great visibility and, thanks to the numerous studies on the process conditions, reached high quality of workpiece production. Nevertheless, the slicers are projected to replicate standard and easy to reproduce patterns, which don’t take into account the final use of the workpiece produced. An optimization of the extruded material is represented by the design oriented to support specific loads, which are applied along specific directions. In this research work is proposed the use of auxetic geometry and two different cell types are proposed and compared with the related conventional workpieces, printed with the same volume density. The use of auxetic design allows for differentiation of the load-bearing and to obtain structures which don’t lose their original shape and that can adsorb the compressive energy reaching the compaction which improves the final resistance.