TY - JOUR
T1 - Research on the fusion of continuous fiber reinforced thermoplastic filaments for fused filament fabrication
AU - Li, Huimin
AU - Lou, Ruishen
AU - Liu, Baosheng
AU - Chen, Yi
AU - Wang, Yulin
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/8/1
Y1 - 2023/8/1
N2 - The printed continuous fiber reinforced thermoplastic composites have drawn extensive attention due to their excellent mechanical properties. However, interlayer and intralayer voids, which are caused by the insufficient fusion of composite filaments, diminish the mechanical behaviors of the parts. In this work, the influence mechanism of continuous fiber on the fusion process is revealed. A numerical framework based on Lagrangian formulation for simulating the fusion process of pre-impregnated filaments is proposed and verified by experiments. Then, the influence of fiber volume fraction, fiber shape, and fiber eccentricity on the fusion process is studied by the numerical model. The concepts of normalized distance and effective volume fraction are proposed to quantify the influence of the fibers. This study is helpful to further understand the process of filament fusion and void formation in material extrusion additive manufacturing.
AB - The printed continuous fiber reinforced thermoplastic composites have drawn extensive attention due to their excellent mechanical properties. However, interlayer and intralayer voids, which are caused by the insufficient fusion of composite filaments, diminish the mechanical behaviors of the parts. In this work, the influence mechanism of continuous fiber on the fusion process is revealed. A numerical framework based on Lagrangian formulation for simulating the fusion process of pre-impregnated filaments is proposed and verified by experiments. Then, the influence of fiber volume fraction, fiber shape, and fiber eccentricity on the fusion process is studied by the numerical model. The concepts of normalized distance and effective volume fraction are proposed to quantify the influence of the fibers. This study is helpful to further understand the process of filament fusion and void formation in material extrusion additive manufacturing.
KW - Continuous fiber reinforced composites
KW - Finite element analysis
KW - Fusion experiments
KW - Lagrangian formulation
KW - Material extrusion
UR - https://www.scopus.com/pages/publications/85159759906
U2 - 10.1016/j.ijsolstr.2023.112328
DO - 10.1016/j.ijsolstr.2023.112328
M3 - Article
AN - SCOPUS:85159759906
SN - 0020-7683
VL - 276
JO - International Journal of Solids and Structures
JF - International Journal of Solids and Structures
M1 - 112328
ER -