Journal of Science  and Technology of Composites

Journal of Science and Technology of Composites

Theoretical and experimental investigation of nanocomposite filament strength

Document Type : Research Paper

Authors
College of Interdisciplinary Science and Technologies, University of Tehran, Tehran, Iran.
Abstract
In this article, the strength of the filament produced by the extrusion method has been investigated. For this purpose, testing samples were produced using ABS and carbon nanotubes as printable nanocomposite filaments in 3D printer. Carbon nanotubes were incorporated into ABS, and nanocomposite filaments were produced and their strengths were measured. In order to predict the strength of a nanocomposite filament, a suitable multi-scale model was developed. This model started from the microscale and after passing the in-between scale of meso, ended at the macroscale. For each scale, a suitable and separate representative volume element was defined, and its strength was predicted. Two parameters, CNT length and orientation, were captured at the microscale, and CNT agglomeration was taken into account at the mesoscale. Finally, at the macroscale, the strength of the nanocomposite filament was estimated using a genetic algorithm. In this study, the strength of the nanocomposite was calculated with two weight fractions of 0.1% and 0.5%, and it was observed that the final strength of the nanocomposite with weight fractions of 0.1% and 0.5% increased by 14% and 20%, respectively. The outputs of the modeling procedure were in very good agreement with experimental observations.
Keywords

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