Optimizing printing and rheological parameters for 3D printing with cementitious materials

Abstract

In 3D printing, selecting appropriate printing parameters based on material rheology is critical for achieving compatible filaments with optimal performance. However, the process of aligning printing parameters with rheological properties lacks a robust theoretical foundation. This study investigates the influence of printing and rheological parameters on the relative printing length of molded filaments, categorizing them into three distinct printing conditions. Computational Fluid Dynamics (CFD) simulations model the slurry extrusion process, analyzing the cross-sectional shape, stress distributions, extruded profile changes, surface roughness, and pore structure under varying conditions. The optimal printing condition is identified based on filament characteristics, aiming to establish a theoretical basis for synchronizing rheological and printing parameters in practical applications.