Non-destructive automatic determination of aspect ratio and cross-sectional properties of fibres

Arttu Miettinen, Antti Ojala, Lisa Wikström, Roberts Joffe, Bo Madsen, Kalle Nättinen, Markku Kataja

Research output: Contribution to journalJournal articleResearchpeer-review


A novel method for computerised estimation of the aspect ratio distribution and various cross-sectional geometrical properties of fibres in short-fibre reinforced composites is proposed. The method, based on X-ray micro-computed tomography, is non-destructive and does not require user intervention. Based on results on specially fabricated model material, the accuracy and precision of the method seems adequate. The method is applied in analysing a manufacturing process of wood fibre reinforced thermoplastic composite. The results indicate a significant decrease of the aspect ratio of fibres during the processing steps. Finally, the feasibility of the method is assessed by estimating parameters of a micromechanical model for flax fibre composites and comparing the results with those from tensile tests. © 2015 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalComposites Part A: Applied Science and Manufacturing
Pages (from-to)188–194
Publication statusPublished - 2015


  • Non-destructive testing
  • Statistical properties
  • Fibres
  • X-ray tomography


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