Nanoscale evaluation of multi-layer interfacial mechanical properties of sisal fiber reinforced composites by nanoindentation technique

Qian Li, Yan Li, Li Min Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

To quantitatively evaluate the nanoscopic mechanical properties of sisal fiber (a typical plant fiber) reinforced epoxy composites (SFRCs) involving the unique structural characteristics, elastic modulus and hardness of the epoxy matrix and cell wall layers of sisal fiber along with interfacial mechanical properties were measured by applying the nanoindentation technique. A series of indents were conducted at selected positions from the matrix to each layer of the fiber cell walls to ascertain transition zones of the multi-layer interfaces. Single-step and multi-step nanoindentation methods were respectively employed on the multi-layer interfaces of SFRCs to present their distinct mechanical properties in terms of modulus and hardness, energy dissipation, crack initiation and propagation upon compressive loading. This study measures the transition zones of the multi-layer interface and the interfacial failure load, which consequently facilitates a quantitative analysis of fracture mechanisms for SFRCs with a multi-scale and multi-layer structure.
Original languageEnglish
Pages (from-to)211-221
Number of pages11
JournalComposites Science and Technology
Volume152
DOIs
Publication statusPublished - 10 Nov 2017

Keywords

  • Crack
  • Elastic properties
  • Interface
  • Nanoindentation
  • Plant fibers

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)

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