A 3D printing tool-path generation strategy based on the partition of principal stress field for FFF Platform

Abstract

In order to enhance the strength of 3D printed parts made of polymer materials and reduce the anisotropy caused by the fused filament fabrication process, this paper proposes an inter-layer interleaved composite path planning method based on the directional partition of the principal stress field. This method not only ensures intra-layer reinforcement under specific working conditions but also increases the strength of the printed part by enhancing the adhesion of adjacent layers through staggered filling between layers. The mechanical performance is improved by 17% compared to other conventional filling patterns such as the zigzag filling algorithm. IICP is suitable for path planning of structures with complex shapes and is easily integrated into existing general computer-aided engineering processes.

An adaptive matrix material extrusion optimization model for in situ impregnated continuous fiber reinforced 3D printing

“…In the study of FFF printing process, more attention was paid to the effect of the fiber material content and layout of the mechanical properties of the samples with specified path planning. Topology optimization has been used to achieve variable fiber content and layout in continuous Fermat spirals(CFS) [25], Zigzag [26], and Hibbert curves [27]. Huang et al [28] simultaneously optimized the fiber orientation and topology, redesign the fiber content by finite element analysis, and changed the continuous fiber path using the layered structure design method as a way to achieve the freedom of continuous fiber reinforced 3D printing and the improvement of mechanical properties of the samples.…”