Numerical modelling of the viscoelastic polymer melt flow in material extrusion additive manufacturing

Xu，Xuguang1; Wanglin，Qiu1; Wan，Dongdong3; Wu，Jin3; Zhao，Feihu2; Xiong，Yi1

2024

10.1080/17452759.2023.2300666

Virtual and Physical Prototyping   影响因子和分区

1745-2759

1745-2767

In material extrusion (MEX), it is challenging to accurately predict the steady and transient feeding forces at various polymer extrusion rates when printing island and thin-walled structures involving rapid start/stop or acceleration/deceleration, especially for semi-crystalline polymers. This research presents a non-isothermal viscoelastic Computational Fluid Dynamics model to investigate the steady and transient feeding forces, as well as the phase transition process and viscoelastic behaviour of polylactic acid (PLA), a semi-crystalline polymer, during the extrusion process. The study establishes a relationship between polymer flow and viscoelastic stress, demonstrating that the elastic effect during extrusion is more significant than the viscous effect, particularly at higher feeding rates. Furthermore, the study uncovers critical aspects of PLA melt flow behaviour during the MEX process, laying the foundation for future research and optimisation of MEX printing processes.

feeding force prediction Material extrusion melt flow semi-crystalline viscoelastic behaviour

SCI ; EI

英语

第一 ; 通讯

Engineering ; Materials Science

Engineering, Manufacturing ; Materials Science, Multidisciplinary

WOS:001138076600001

TAYLOR & FRANCIS LTD

2-s2.0-85181723673

Scopus

1.School of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen,China
2.Zienkiewicz Centre for Computational Engineering,Department of Biomedical Engineering,Faculty of Science and Engineering,Swansea University,Swansea,United Kingdom
3.Runice Co.,Ltd,Suzhou,China

Xu，Xuguang,Wanglin，Qiu,Wan，Dongdong,et al. Numerical modelling of the viscoelastic polymer melt flow in material extrusion additive manufacturing[J]. Virtual and Physical Prototyping,2024,19(1).

Xu，Xuguang,Wanglin，Qiu,Wan，Dongdong,Wu，Jin,Zhao，Feihu,&Xiong，Yi.(2024).Numerical modelling of the viscoelastic polymer melt flow in material extrusion additive manufacturing.Virtual and Physical Prototyping,19(1).

Xu，Xuguang,et al."Numerical modelling of the viscoelastic polymer melt flow in material extrusion additive manufacturing".Virtual and Physical Prototyping 19.1(2024).