37—A THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE STIFFNESS AND CREASE RECOVERY OF MONOFILAMENT FABRICS

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Abstract
A theoretical expression is derived for the variation of the crease-recovery angle of a plain-weave monofilament fabric with orientation of the crease to the thread directions; it involves the constructional parameters of the fabric, the flexural and torsional rigidities of the monofilaments, and their elastic recoveries from flexural and torsional strains. This expression has been checked for two nylon fabrics, and, with one adjustable parameter, good agreement is obtained between the theoretical and observed polar variations. The variation of the fiexural rigidity of these fabrics with orientation is shown to be in agreement with the theoretical predictions of Cooper.

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