Investigation of damage mechanism of flax fibre LPET commingled composites by acoustic emission

Aslan M.

COMPOSITES PART B-ENGINEERING, vol.54, pp.289-297, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 54
  • Publication Date: 2013
  • Doi Number: 10.1016/j.compositesb.2013.05.042
  • Journal Name: COMPOSITES PART B-ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.289-297
  • Keywords: Natural fibre composites, Thermoplastic resin, Mechanical properties, Acoustic emission, Filament winding, REINFORCED POLYPROPYLENE COMPOSITES, FAILURE BEHAVIOR, TENSILE FRACTURE, POROSITY, STRENGTH
  • Karadeniz Technical University Affiliated: Yes

Abstract

Abstract

Tensile failure and fracture behaviour of parallel laid twisted flax fibre reinforced low melting polyethylene terephthalate (LPET) composites were investigated. The tensile failure results of the model specimens were compared with AE results in terms of amplitude, energy and counts. The failure results of the flaxfibre LPET composites exhibited mainly matrix crack initiation as a brittle failure for low, medium and high fibre contents. Since the composites at high fibrecontents have higher porosity content, they show higher strain to failure, higher variation in the tensile results and have different appearances on their fracture surfaces than those of the composites at low and medium fibre contents.

Tensile failure and fracture behaviour of parallel laid twisted flax fibre reinforced low melting polyethylene terephthalate (LPET) composites were investigated. The tensile failure results of the model specimens were compared with AE results in terms of amplitude, energy and counts. The failure results of the flax fibre LPET composites exhibited mainly matrix crack initiation as a brittle failure for low, medium and high fibre contents. Since the composites at high fibre contents have higher porosity content, they show higher strain to failure, higher variation in the tensile results and have different appearances on their fracture surfaces than those of the composites at low and medium fibre contents. (c) 2013 Elsevier Ltd. All rights reserved.