The equilibrium of the convergence point in two-strand yarn plying

Fraser W.B. and Stump D.M. (1998) The equilibrium of the convergence point in two-strand yarn plying. International Journal of Solids and Structures, 35 3-4: 285-298.

Author Fraser W.B.
Stump D.M.
Title The equilibrium of the convergence point in two-strand yarn plying
Journal name International Journal of Solids and Structures   Check publisher's open access policy
ISSN 0020-7683
Publication date 1998
Sub-type Article (original research)
Volume 35
Issue 3-4
Start page 285
End page 298
Total pages 14
Subject 2210 Mechanical Engineering
2211 Mechanics of Materials
Abstract In this paper the theory of the bending and twisting of thin rods of uniform circular cross-section is used to find the relationships between the ply-helix angle, the strand convergence angle, and the applied tensions and torques required to hold the plied strands illustrated in Fig. 1 in equilibrium. The solution of this problem is of importance to the textile yarn manufacturing industry where singles yarns, made from long staple fibres, such as wool, are plied together in order to bind the surface fibres more effectively into the plied yarn structure. This produces warp yarns that are more abrasive resistant. A formula for the relationship between the pre-twist in two initially straight strands, and the helix angle of the plied structure obtained when they are allowed to twist together into a balanced ply structure is also derived in Section 4. A balanced two-ply structure is one that will maintain its configuration without the application of external tension or torque. Balanced ply structures are also important in textile manufacturing processes.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
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