Abstract
Stress-strain, creep and torque-twist measurements on a large number of wool fibres of varying type are used to illustrate how fibre non-uniformities affect the observed behaviour and how the fibre material behaviour is extracted from the measurements. In this regard the concept of “effective area” of a cross-section is introduced in order to simplify the analysis. It is shown that fibre non-uniformities may hide the effects of certain structural features and if reasonably uniform fibres are not available it may not always be possible to derive the true material behaviour. Variation of properties between fibres can be useful in deriving significant structural information about the fibre material.
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