Application of analytic hierarchy process to determine and optimize FDM printing process parameters

Sah Azmi, Amirah Atiqah (2021) Application of analytic hierarchy process to determine and optimize FDM printing process parameters. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (Full Text) Application of analytic hierarchy process to determine and optimize FDM printing process parameters.pdf - Submitted Version Download (3MB)

Abstract

Analytic Hierarchy Process (AHP) is one of the popular mathematical tools that can solve the problem. The AHP method focus on the problem in three parts which are the first part is the objective of the problem that needs to be solved. Then the second part is the alternatives that can solve the problem while the last important part is the criteria that are used to evaluate the alternative solutions. Fused Deposition Modeling (FDM) is a process that deposits fused material layers according to the CAD models. This project aims to use the AHP to investigate the effect of process parameters such as layer thickness, infill density, build orientation, and raster angle on the tensile strength of FDM printed objects got from the surveys. After getting the result from the AHP analysis, the tensile strength was analyzed from the process parameters that were optimized. Using the Computer-Aided Three-Dimensional Interactive Application (CATIA) software, the specimen that would be the American Society for Testing and Materials (ASTM) D638 Type 1 standard was drawn. The material specimen used is Polylactic Acid (PLA). Then, the specimen was sliced by using Ultimaker Cura software and printed by using Ender 3 V2 3D printer. After tested the tensile strength, AHP sensitivity analysis is conducted to test the accuracy of all the process parameters on the ranking of the AHP analysis by using Super Decision V3.2 software. The result for this project shows that from the AHP analysis the best process parameter for tensile strength of FDM technology is option 3 which has the first highest score which is 0.717. To validate the result from the AHP analysis, the tensile strength of option 3 is tested with different layer thicknesses due to layer thickness has the highest criteria weight in AHP analysis. It shows that option 3 has the highest tensile strength which is 2556.

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