Comparative Analysis Based on MCDM Optimization of Printing Parameters Affecting Compressive and Tensile Strength of Fused Deposition Modelling Processed Parts

Abstract

Fused deposition modelling (FDM) is a fast budding rapid prototyping (RP) technology due to its ability to manufacture functional parts with complex geometrical shapes in reasonable build time without any tooling requirement and human interface. It has a complex part building contrivance making it challenging to obtain reasonably noble functional relationship among responses and process parameters. The properties of FDM built parts i.e. dimensional accuracy, surface roughness, mechanical strength etc. and above all functionality of built parts exhibit high dependence on many process variables and their settings. Present study determines the relationship between five important process parameters such as layer thickness, orientation, raster angle, raster width and air gap have been considered to study their effects on compressive strength and tensile strength of the built part. Twenty-seven experiments have been conducted using Taguchi’s design and two different optimizations has been used i.e. MOORA technique and Utility concept. Finally, the confirmation test was carried out to validate the obtained results and the models are validated using analysis of variance (ANOVA).