ABSTRACT

The enhancement of surface roughness of a textile-like porous medium fabricated by 3D printing techniques is crucial for the repeatability of permeability experiments from test to test. This paper aims at comparison of the surface quality of textile-like porous media fabricated by Stereolithography (SLA), Fused Deposition Modeling (FDM), and Multi Jet Fusion (MJF) 3D printing techniques. Hence, a 3D optical profilometer was used to evaluate the 3D areal surface texture parameters of samples according to ISO 25178. The results revealed that SLA technique produces the smoothest surface with the lowest deviation in the measured values of the surface characteristics. Also, the surface parameters such as the average roughness (Sa) and root mean square (RSM) roughness (Sq) of the top surface of MJF samples are lower than those measured for FDM sample. Furthermore, filling pattern of the FDM technique as a trajectory filament-based AM process results in rougher horizontal surfaces compared to those produced by a non-trajectory powder-based process such as MJF.

摘要

通过 3D 打印技术制造的织物状多孔介质表面粗糙度的增强对于渗透性实验从测试到测试的可重复性至关重要。本文旨在比较通过立体光刻 (SLA)、熔融沉积建模 (FDM) 和多喷射融合 (MJF) 3D 打印技术制造的织物状多孔介质的表面质量。因此，根据 ISO 25178，使用 3D 光学轮廓仪评估样品的 3D 区域表面纹理参数。结果表明，SLA 技术产生的表面最光滑，表面特性的测量值偏差最小。此外，MJF 样品顶面的平均粗糙度 (Sa) 和均方根 (RSM) 粗糙度 (Sq) 等表面参数低于 FDM 样品测量的参数。