Comparison of strength of 3D printing objects using short fiber and continuous long fiber

13th International Conference on Textile Composites

Isobe, T.^1 ; Tanaka, T.^2 ; Nomura, T.^3 ; Yuasa, R.^3

Graduate School of Science and Engineering, Doshisha University, Kyoto, Japan^1

Faculty of Science and Engineering, Doshisha University, Kyoto, Japan^2

Kyoraku Co., Ltd., Kanagawa, Japan^3

关键词: Carbon fiber reinforced composite;    Continuous fibers;    Fracture surfaces;    Laminated layer;    Poly lactic acid;    Short carbon fibers;    Strength improvements;    Two-materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/406/1/012042/pdf
DOI  :  10.1088/1757-899X/406/1/012042

来源: IOP

【 摘 要 】

In this research, composite materials were used to improve the strength of FDM 3D printed objects. The nanocomposites made from polylactic acid as matrix and multi-wall carbon nanotube as filler, short carbon fiber reinforced composite and continuous carbon fiber reinforced composite were prepared, and tensile test was carried out. As a result, the continuous fiber reinforced material exhibited tensile strength of about 7 times and elastic modulus about 5 times that of the other two materials. The strength was greatly improved by using the continuous fiber. The fracture surface after the test was observed using a scanning electron microscope. The result of observation shows that adhesion between the laminated layers and the relationship between the fiber and the matrix are bad, and improving these are necessary to increase strength. Comparing those materials, it is possible to improve the strength in some degree by using short fiber while maintaining ease of printing. On the other hand, by using continuous fiber it can be achieved significant strength improvement while printing was complicated.