Linear Viscoelasticity of Bio-based Composites of Polylactic Acid and Regenerated Cellulose Fibers: Modeling and Experimental Validation

[Display omitted] A viscoelastic constitutive relationship of bio-based composites made from polylactic acid (PLA) and regenerated cellulose fibers (RCF) is developed by extending the Halpin-Tsai-Pagano model for linear elastic composites to the linear viscoelastic regime using the correspondence pr...

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Bibliographic Details
Published inComposites. Part A, Applied science and manufacturing Vol. 171; p. 107580
Main Authors Chen, Yu, Tang, Tian, Ayranci, Cagri
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2023
Subjects
Analytical modeling
Biocomposite
Creep
Extrusion
Analytical modeling
Extrusion
Creep
Biocomposite
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Summary:[Display omitted] A viscoelastic constitutive relationship of bio-based composites made from polylactic acid (PLA) and regenerated cellulose fibers (RCF) is developed by extending the Halpin-Tsai-Pagano model for linear elastic composites to the linear viscoelastic regime using the correspondence principle. To predict the creep compliance of PLA/RCF composites, the model only requires the constitutive relationships of the constituents, as well as concentration and geometry of the RCF. PLA/RCF composites with different RCF concentration are manufactured using a customized core–shell extrusion process, and creep tests are performed to extract their creep compliances. Good agreement is found between the model prediction and experimental results. The model has the potential to predict the linear viscoelasticity of other types of bio-based composites reinforced by short fibers.
ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2023.107580