From a study of the relationship between the breaking strength and the corresponding mass per unit length at thefracture zone of a yarn, the expected strength of a perfectly even yarn of identical fiber composition has been derived. The ratio between the observed strength and this estimated value has been taken as a measure of utilization of fiber strength in yarn. The dependence of this utilization factor on the diameter irregularity of yarn has been examined on the basis of test results obtained on a number of yarn samples of different qualities. The yarn tenacity at the fracture zone is also found to be related with its diameter irregularity; the causes of this are discussed
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2.
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5.
KohlerS., The Influence of Fiber-Length on the Proportion of Fiber Strength Utilized in Cotton Yarn, J. Textile Inst. 25, T141–T149 (1934).
6.
NanjundayyaC., Strength of a Cotton Yarn with Particular Reference to the Structure at the Region of Break, Textile Res. J. 36, 954–966 (1966).
7.
ShorterS. A., The Elements of a Unified Theory of Yarn Structure and Strength, J. Textile Inst. 48, T99–T108 (1957).
8.
SikorskiJ.WhewellC. S.WoodsH. J., A Photographic Recording Extensometer, J. Textile Inst. 38, T20–T37 (1947).
9.
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