Detailed void characterisation by X-ray computed tomography of material extrusion 3D printed carbon fibre/PEEK

被引：22

作者：

Sommacal, S. ^{[1
]}

Matschinski, A. ^{[2
,3
]}

Holmes, J. ^{[1
]}

Drechsler, K. ^{[2
]}

Compston, P. ^{[1
]}

机构：

[1] Australian Natl Univ, ARC Training Ctr Automated Manufacture Adv Composi, Res Sch Phys, Canberra 2600, Australia

[2] Tech Univ Munich, Chair Carbon Composites, Dept Aerosp & Geodesy, D-85748 Garching, Germany

[3] Stanford Univ, Struct & Composites Lab, 496 Lomita Mall Durand Bldg, Stanford, CA 94305 USA

来源：

COMPOSITE STRUCTURES | 2023年 / 308卷

关键词：

Carbon fibres; Porosity; CT analysis; 3-D printing; Additive manufacturing; Material extrusion; Fused filament fabrication; ETHER-ETHER-KETONE; MECHANICAL-PROPERTIES; POLYETHERETHERKETONE PEEK; COMPOSITES; FIBER; DAMAGE; SEGMENTATION; BEHAVIORS; POLYMERS; DEFECTS;

D O I：

10.1016/j.compstruct.2022.116635

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Material extrusion (ME) is one of the most popular techniques for 3D printing. However, despite offering almost unlimited flexibility in the design and choice of material of the printed components, it is yet to be widely adopted in the industry. Mechanical properties of printed parts are usually below expectations and this can be caused by the presence of voids, the most commonly encountered structural defect. Besides quantity, void type, shape, size, and their location, density and distribution within the microstructure can affect the material's mechanical properties. Detailed knowledge of void geometric characteristics is also crucial for modelling and simulation, and there is a need for comprehensive experimental derived void databases. In this work, X-ray micro-computed tomography has been utilised to image two samples printed by ME and their respective parent feedstock fila-ments. Voids have been identified, quantified, mapped in 3D, then individually labelled, and their key geometrical characteristics extracted and analysed. Furthermore, the effects of the printing process on voids' geometry and distribution have been qualitatively and quantitatively assessed.

引用

页数：15

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