Optimization of process variables to improve the mechanical properties of FDM structures

This paper presents, the experimental methodology to optimize the process variable for Fused deposition modeling (FDM) fabricated parts. Process variable plays an important role to influence the mechanical and physical properties of a component. In this study, 3 important process variables, i.e., layer thickness, infill percentage, and print speed were considered to carry out their effect on Tensile and compressive strength of ABS (Acrylonitrile Butadiene Styrene) fabricated specimens. The experiments process based on Design of experiment (DOE) methodology. The recent studies only focused one process variable at a time, and its effect on mechanical properties of FDM processed part. But the present study gives an insight into 3 process variable influence on the FDM manufactured components. Obtained results were analyzed by the DOE and optimization techniques. The experimental results highlighted that, out of the 3-process variable, layer thickness and infill percentage have a major impact on the mechanical properties of FDM structures. The remaining one process variable has less influencing characteristics, but it comes into effect in a certain domain. The results give the functional relationship between process variables and the mechanical properties of the component. This study shows very promising results to enhance the strength of a part fabricated by using FDM technology.