Effect of single-fiber properties and fiber volume fraction on the mechanical properties of Ioncell fiber composites

Abstract

The present study concentrates on a series of experiments and numerical analyses for understanding the effects of fiber volume fraction ( VF) and draw ratio ( DR) on the effective elastic properties of unidirectional composites made from an epoxy resin matrix with a continuous fiber reinforcement. Lyocell-type regenerated cellulose filaments (Ioncell) spun with DRs of 3, 6, and 9 were used. In accordance with the specimens in situ, the fibers were modeled as slender solid elements, for which the ratio between the diameter and length was taken to be much less than unity and deposited inside the matrix with the random sequential adsorption algorithm. The embedded element method was thereafter used in the numerical framework due to its computational advantages and reasonable predictions for continuous fiber reinforced composites. Experiments and numerical investigations were carried out, the results of which were compared, and positive trends for both fiber VFs and DRs on the effective properties were observed. The presented experimental and numerical results and models herein are believed to advance the state of the art in the mechanical characterization of composites with continuous fiber reinforcement.

Exploring the potential of regenerated Ioncell fiber composites: a sustainable alternative for high-strength applications

“…However, one research has been conducted using the Ioncell-F filament form in unidirectional composites. The author assessed how the proportion of volume and the characteristics of the fiber affect the mechanical properties of the composite, 28,29 whereas this study evaluates the potential of woven fabric structures and compared the properties of composite with high-strength carbon and glass fiber as well as commercial high-strength viscose fiber. Composites made from carbon fiber are not capable of breaking down naturally.…”

3D printing of continuous cellulose fibre composites: microstructural and mechanical characterisation

“…Hence, the use of CCFs as reinforcement is of great interest within the composite industry. For example, CCF composites manufactured by traditional processes were made with thermoset resins such as polyester (Volkmann et al , 2012; Qin and Fancey, 2018) or epoxy (Karakoc et al , 2021; Ungerer et al , 2021; Mader et al , 2016). To use a recyclable matrix, a few researchers studied CCF composites made with thermoplastic resins.…”