Micromechanics stiffness upscaling of plant fiber-reinforced composites | TU Wien

Information

Publication Type: Journal Paper (without talk)
Workgroup(s)/Project(s):
- Advanced Computational Design
Date: July 2024
Article Number: 111571
DOI: 10.1016/j.compositesb.2024.111571
ISSN: 1879-1069
Journal: COMPOSITES PART B-ENGINEERING
Open Access: yes
Pages: 20
Volume: 281
Publisher: ELSEVIER SCI LTD
Pages: 1 – 20
Keywords: Biocomposite, Elasticity, Fiber orientation, Multiscale modeling, Natural fibers, Weak interface, Young's modulus

Abstract

Fiber-reinforced green composites made from natural plant fibers are an increasingly popular sustainable alternative to conventional high-performance composite materials. Given the variety of natural fibers themselves, and the even larger variety of possible composites with specific fiber dosage, fiber orientation distribution, fiber length distribution, and fiber–matrix bond characteristics, micromechanics-based modeling is essential for characterizing the macroscopic response of these composites. Herein, an analytical multiscale micromechanics model for elastic homogenization is developed, capable of capturing the variety. The model features (i) a nanoscopic representation of the natural fibers to predict the fiber stiffness from the universal stiffness of the fiber constituents, mainly cellulose, (ii) a spring-interface model to quantify the compliance of the fiber–matrix bond, and (iii) the ability to model any (and any combination of) orientation distribution and aspect ratio distribution. Validation is performed by comparing the predicted stiffness to experimental results for as many as 73 composites available in the literature. Extensive sensitivity analyses quantify the composite stiffening upon increasing fiber volume fraction, fiber alignment, fiber length, and fiber–matrix interface stiffness, respectively.

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BibTeX

@article{koenigsberger-2024-msu,
  title =      "Micromechanics stiffness upscaling of plant fiber-reinforced
               composites",
  author =     "Markus K\"{o}nigsberger and Valentin Senk and Markus
               Lukacevic and Michael Wimmer and Josef F\"{u}ssl",
  year =       "2024",
  abstract =   "Fiber-reinforced green composites made from natural plant
               fibers are an increasingly popular sustainable alternative
               to conventional high-performance composite materials. Given
               the variety of natural fibers themselves, and the even
               larger variety of possible composites with specific fiber
               dosage, fiber orientation distribution, fiber length
               distribution, and fiber–matrix bond characteristics,
               micromechanics-based modeling is essential for
               characterizing the macroscopic response of these composites.
               Herein, an analytical multiscale micromechanics model for
               elastic homogenization is developed, capable of capturing
               the variety. The model features (i) a nanoscopic
               representation of the natural fibers to predict the fiber
               stiffness from the universal stiffness of the fiber
               constituents, mainly cellulose, (ii) a spring-interface
               model to quantify the compliance of the fiber–matrix bond,
               and (iii) the ability to model any (and any combination of)
               orientation distribution and aspect ratio distribution.
               Validation is performed by comparing the predicted stiffness
               to experimental results for as many as 73 composites
               available in the literature. Extensive sensitivity analyses
               quantify the composite stiffening upon increasing fiber
               volume fraction, fiber alignment, fiber length, and
               fiber–matrix interface stiffness, respectively.",
  month =      jul,
  articleno =  "111571",
  doi =        "10.1016/j.compositesb.2024.111571",
  issn =       "1879-1069",
  journal =    "COMPOSITES PART B-ENGINEERING",
  pages =      "20",
  volume =     "281",
  publisher =  "ELSEVIER SCI LTD",
  pages =      "1--20",
  keywords =   "Biocomposite, Elasticity, Fiber orientation, Multiscale
               modeling, Natural fibers, Weak interface, Young's modulus",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/2024/koenigsberger-2024-msu/",
}