International Journal of Engineering and Artificial Intelligence Vol 2 No 2 (2021) 81–91 International Journal of Engineering and Artificial Intelligence Journal home page: http://www.ijeai.com Study on the effect of fused deposition modelling (FDM) process parameters on tensile strength and their optimal selection Amanuel Diriba Tura 1* , Hana Beyene Mamo 2 , Dommeti Kamalakara Rao 3 1,2,3 Faculty of Mechanical Engineering, Jimma Institute of Technology, Jimma, Oromia, Ethiopia Corresponding Author: diriba.amanuel@ju.edu.et / amanueldiriba@gmail.com Original article Received 30 April r 2021, Accepted 24 May 2021, Available online 1 June 2021 1. Introduction Additive Manufacturing (AM) technology, or more commonly known as 3D Printing, or Rapid Prototyping (RP), is a relatively new technology that emerged in the 1980s to create 3D objects. In 3D printing, parts produce 3D solid objects from a digital design. Typically, the final product is built by depositing materials in a layer-by-layer process without the use of traditional tools. You can use the PC software package to draw the desired part/object as a 3D object. AutoCAD and SolidWorks are the industry's most popular software platforms for designing complex prototypes for 3D printing applications. These 3D program files can be converted to the Stereolithography (STL) format, which is a format that 3D printers can understand(Abeykoon, Sri-Amphorn, & Fernando, 2020; Habibi & Ziadia, 2021; Krajangsawasdi, Blok, Hamerton, & Longana, 2021; Series & Science, 2021b, 2021a) . Typical 3D printers have print nozzles that can be moved in three dimensions (x, y, z) and can handle single or multiple ABSTRACT Additive manufacturing (AM), also known as 3D printing, is a transformative method to industrial fabrication that enables the creation of lighter, stronger parts and systems. Additive manufacturing uses data computer-aided-design (CAD) software or 3D object scanners to direct hardware to deposit material, layer upon layer, in precise geometric shapes. Fused deposition modeling (FDM) is one of the mainly used AM techniques for fabricating prototypes and functional parts in common engineering plastics. At various process parameters, mechanical properties of printed parts are significantly changed. Therefore, it is important to examine the influence of printing parameters on quality of printing part. This article provides an experimental investigation for the quality analysis of process parameters on printed parts using fused deposition modelling (FDM) in terms of tensile strength. The experiment were carried out using Taguchi’s L9 orthogonal array technique by varying process parameters such Infill density, Inf ill pattern and Layer thickness using Acrylonitrile butadiene styrene (ABS) print material. Taguchi method are applied for the Multi-objective optimization of characteristics of Printing parts. ANOVA, S/N ratio, and 3D surface plot were used for analysis of experimental result and study the effect of process parameters. Results of Taguchi optimization indicates that the optimal FDM parameters for Tensile strength (UTS) are the layer height at 0.19mm, the Infill rate at 45 %, Build speed at 180 mm/min and the build temperature at 240 ºC which gives maximum UTS =39.094 MPa at maximum value of S/N ratio = 31.8422. Keywords: Additive manufacturing , Fused deposition modeling; Tensile strength; ANOVA; Taguchi method. International Journal of Engineering and Artificial Intelligence (IJEAI). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).