Finite element analysis of fused filament extrusion build part using different build orientation

Abstract

3D printing has converged the whole manufacturing process in this competitive world of technology. Replacement of subtractive to additive principle introduced trouble-free production of complex shapes with least wastage of material. Fused Filament Extrusion (FFE) is a widely used 3D printing technique. But strength of the 3D printed part was always be the question for critical application. Build orientation is one of the listed parameters of 3D printing process which plays a vital role on the fracture resistance of the 3D printed part. In order to understand the fracture resistance numerically, Finite Element Analysis has been performed on the CT-specimen. In the present work, Acrylonitrile Butadiene Styrene (ABS) material has been considered. The CT-specimen is loaded in the crack opening mode with displacement-controlled loading. Orthotropic behaviour was used for material definition. The value of load and Fracture toughness in terms of J-integral is estimated at the crack initiation. It was observed that the value of J-integral increased considerably with the increase in build orientation from 0 to 90 degrees.