On the Liveliness of Fabrics

Abstract

The liveliness of fabrics was investigated. This investigation resulted from the following four experiments : measuring the speed of recovery of the angle after bending, sensory test of recovery force, and measuring the stiffness and bending properties.
Used samples in these experiments were 11 kinds of cotton, 8 kinds of silk, and 10 kinds of wool. The weave of each sample was plain weave.
Through this investigation the following results were obtained. (1) It was observed that in silk, the recovery after bending became slow as the angle of recovery became wide after releasing from the fixed condition. But in cotton and wool, the recovery speed of the angle between 90 and 135° tended to become slower than between 45 and 90°. (2) In each of the three samples (cotton, silk, and wool), there existed a correlation between 1/ω and stiffness. (3) As for wool, there existed correlations between 1/ω and bending maximum stress, and also between 1/ω and bending recovery strain. (4) Only in the case of silk, the scale of sensory test of recovery force had a correlation with the speed of recovery after bending and stiffness.