When single fibers are twisted under constant tension before testing, a decrease in strength is observed. This reduction in strength is generally small with fibers having low orientation (low draw ratio) and increases as the draw ratio increases. The difference in the strength resulting from twist is negatively correlated with temperature.
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References
1.
Dent, R.W. and Hearle, J.W.S., Textile Res. J.30, 805 (1960).
