Comparison of strength and Young modulus of aligned discontinuous fibre PLA composites obtained experimentally and from theoretical prediction models

Aruan Efendy Mohd Ghazali, K. L. Pickering

Research output: Contribution to journalArticle

Abstract

The present paper describes work carried out to compare the strength performance of PLA reinforced aligned discontinuous harakeke and hemp fibre mat composites evaluated experimentally and using various simple elastic mathematical prediction models. Fibre mats were produced by means of Dynamic Sheet Former (DSF), and stacked alternately with PLA sheets to produce composites with up to 40 wt% fibre content. The fibre content was increased from 5 wt% to 40 wt% using 5 wt% interval. In this work, both harakeke and hemp composites were manufactured using hot-press. It was found that, better agreement to the experiment was obtained for Young's modulus compared to those composite strengths. The Modified Rule of Mixtures is found to give accuracy within 41% for strength, while the Cox model showing the best agreement (<10%) for Young's modulus for fibre contents up to 25 wt%. Better agreement obtained for Young's modulus is believed to due to less mechanism involved at where Young's modulus is measured.

LanguageEnglish
Pages566-573
Number of pages8
JournalComposite Structures
Volume208
DOIs
Publication statusPublished - Jan 15 2019

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Hemp
Cannabis
Reinforcement
Elastic moduli
Fibers
Composite materials
Hemp fibers
Experiments

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Civil and Structural Engineering

Cite this

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abstract = "The present paper describes work carried out to compare the strength performance of PLA reinforced aligned discontinuous harakeke and hemp fibre mat composites evaluated experimentally and using various simple elastic mathematical prediction models. Fibre mats were produced by means of Dynamic Sheet Former (DSF), and stacked alternately with PLA sheets to produce composites with up to 40 wt{\%} fibre content. The fibre content was increased from 5 wt{\%} to 40 wt{\%} using 5 wt{\%} interval. In this work, both harakeke and hemp composites were manufactured using hot-press. It was found that, better agreement to the experiment was obtained for Young's modulus compared to those composite strengths. The Modified Rule of Mixtures is found to give accuracy within 41{\%} for strength, while the Cox model showing the best agreement (<10{\%}) for Young's modulus for fibre contents up to 25 wt{\%}. Better agreement obtained for Young's modulus is believed to due to less mechanism involved at where Young's modulus is measured.",
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