The geometry of two-components yarns is investigated, and a new approach is presented which addresses some of the limitations of other models The model takes account of the compressional deformation of the individual strands caused by transverse forces generated during the twisting process. The change in the cross-section takes account of the mechanical properties of the strands and the observed changes in cross-section shape caused by lateral compression. The outcome is a methodology and predictive equations for modelling the compressed shape of strands in two-component yarns; the model has been successfully used in CAD systems to simulate yarn appearance.
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Grishanov et al. (1997) studied this question.
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