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.
Highlights
The successful transition to a bio-based economy requires performance materials made from renewables.[1,2,3,4] As illustrated in Figure 1, the end products of interest have far been garments, consumer goods, packaging products, and structural components, just to name a few
Composites from regenerated cellulose fibers have been attracting a lot of attention to date, the numerical analysis of these types of composites has been lagging behind due to the computational costs and unknown material characteristics in continuous fiber modeling, for example, single-fiber characteristics and interactions between fibers and the matrix.[15,16]
The present study provided a systematic approach to characterize the Ioncell regenerated cellulose fiber reinforced composites and to understand how fiber volume fraction (VF) and the properties of the reinforcing fibers affect their elastic moduli
Summary
The successful transition to a bio-based economy requires performance materials made from renewables.[1,2,3,4] As illustrated in Figure 1, the end products of interest have far been garments, consumer goods, packaging products, and structural components, just to name a few. It is known that the incorporation of renewable materials into various matrices can provide bespoke performance and increased sustainability.[5,6,7] For instance, continuous fiber reinforced polymer composites are well-known and widely used examples that are light and strong and have versatility in a broad range of engineering and consumer product applications For these types of composites, regenerated cellulose fibers, which have been demonstrated to have favorable properties compared to their natural counterparts, can replace synthetic reinforcements.[8,9,10] the fiber spinning process, as part of the regenerated fiber process path, allows the production of tailor-made fibers which is of advantageous in terms of design and manufacturing constraints.[11,12,13,14] composites from regenerated cellulose fibers have been attracting a lot of attention to date, the numerical analysis of these types of composites has been lagging behind due to the computational costs and unknown material characteristics in continuous fiber modeling, for example, single-fiber characteristics and interactions between fibers and the matrix.[15,16] in order to contribute to the current state of the art from this perspective, a series of experiments at the single fiber (constituent) and composite (material) level integrated with the numerical analyses were carried out
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
