Fiber reorientation in hybrid helicoidal composites

Di Wang, Alireza Zaheri, Benjamin Russell, Horacio Espinosa, Pablo Zavattieri*

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Naturally occurring biological materials with stiff fibers embedded in a ductile matrix are commonly known to achieve excellent balance between stiffness, strength and ductility. In particular, biological composite materials with helicoidal architecture have been shown to exhibit enhanced damage tolerance and increased impact energy absorption. However, the role of fiber reorientation inside the flexible matrix of helicoid composites on their mechanical behaviors have not yet been extensively investigated. In the present work, we introduce a Discontinuous Fiber Helicoid (DFH) composite inspired by both the helicoid microstructure in the cuticle of mantis shrimp and the nacreous architecture of the red abalone shell. We employ 3D printed specimens, analytical models and finite element models to analyze and quantify in-plane fiber reorientation in helicoid architectures with different geometrical features. We also introduce additional architectures, i.e., single unidirectional lamina and mono-balanced architectures, for comparison purposes. Compared with associated mono-balanced architectures, helicoid architectures exhibit less fiber reorientation values and lower values of strain stiffening. The explanation for this difference is addressed in terms of the measured in-plane deformation, due to uniaxial tensile of the laminae, correlated to lamina misorientation with respect to the loading direction and lay-up sequence.

Original languageEnglish (US)
Article number103914
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume110
DOIs
StatePublished - Oct 2020

Keywords

  • Biomimetic nacre/helicoidal composites
  • Fiber reinforced compliant matrix
  • Fiber reorientation
  • Finite element analysis (FEA)
  • Hybrid helicoidal composites

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

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