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Technical fibres, such as carbon and glass, present unique challenges when measuring dimensional and mechanical properties. At Dia-Stron we constantly strive to design and manufacture the most effective testing systems for these technically challenging materials, in order to conduct the most efficient technical fibre testing possible. The mechanical characterisation of these fibres/filaments, especially in uniaxial tensile deformation, is routinely measured to understand and to predict the behaviour of composite parts.

Single fibre testing is recognized as the most reliable and unambiguous means of characterising fibres and filaments, when compared to tow, bundle or yarn testing. Dia-Stron have developed a unique approach to sample mounting, solving the common pitfalls of the traditional card frame method such as specimen misalignment, gauge length inaccuracies and low measurement success rates, and allowing a typically lengthy testing process to be dramatically reduced in terms of time and resources.

 

 

Specimens are mounted between pairs of plastic tabs with “V” alignment features, pre-loaded in a storage cassette, and secured using various UV-curing adhesives. The cassettes are loaded onto our automated platforms for testing, keeping specimens at a consistent gauge length, aligned and square without the need for user intervention. This unique approach also allows samples to be mounted in large quantities and in advance of testing studies.

 


 

Dia-Stron’s instrumentation range has been developed for measurements on two distinct fibre types — man-made and natural. Man-made fibre examples include carbon, ceramic, glass, basalt, aramid, quartz or polymeric such as polyethylene and textiles (polyester). Natural fibres comprise of plant-based fibres such as flax, bamboo, sisal, coco, hemp, jute and cotton, as well as animal-based fibres including wool, hair and silk.

Typical applications —

  • Tensile properties of single fibres such as elastic modulus, break stress/strain
  • Interfacial shear strength properties between filaments and resins
  • Evaluation of cross-sectional swelling of natural fibres whilst immersed in water
  • Fatigue survivability of textile fibres: S/N curves, Weibull and Kaplan Meier analyses
  • Assessment of anisotropy of polymeric fibres: tensile, bending and torsion deformations

 

 

To find out more about testing specific fibrous materials please see the pages below or contact us for more information.

Delivering Measurement Solutions