A high resolution method for characterisation of fibre misalignment angles in composites
Artikel i vetenskaplig tidskrift, 2018

In this paper a novel method to characterise fibre waviness in composites is presented and assessed. The proposed method referred to as the “high resolution misalignment analysis” (HRMA) method and is suitable for measurements with high spatial resolution. The HRMA method measures misalignment angles tracing individual fibres in detailed micrographs. Here, the method is evaluated using software-generated images with known statistics to mimic real micrographs. Results reveal that the HRMA method provides very accurate measurements on composites with high fibre waviness, outperforming existing methods, whereas it performs on par with existing methods for materials featuring medium fibre waviness. The HRMA method is capable of characterising a 2 cm2micrograph with a spatial resolution of 55 μm in approximately 1 min on a standard laptop computer. The HRMA code and software-generated images are supplied as supplementary material to this paper.

B. Defects

Fibre waviness

A. Fabrics/textiles

A. Carbon fibres

D. Optical microscopy


Dennis Wilhelmsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Leif Asp

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Composites Science and Technology

0266-3538 (ISSN)

Vol. 165 214-221


Datorseende och robotik (autonoma system)

Kompositmaterial och -teknik

Medicinsk bildbehandling



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