30—The Resistance of Fabrics to Shearing Forces

Mechanical response of fabric sheets to three-dimensional bending, twisting, and stretching

“…Experiments on fabrics [31][32][33] indicate that their resistance to shear is quite weak unless the fibers are nearly aligned; that is, unless |sin γ | is close to unity. The loci of points where |sin γ | = 1 are the curves determined by combining Eqs.…”

Study of the effect of different weave constructions on the drapeability of jute woven fabric

“…It is the measure of the draping quality of the fabric sample. Chu et al (1950) and Cusick (1961) made a great contribution to the practical determination of this fabric property by measuring three-dimensional draping. The current standard drapemeter is the result of their effort, in which the drape coefficient (the ratio of the projected area to the specimen's original area) is determined.…”

“…Fabric drapeability not only enables one to mould a fabric to a required shape but also allows it to fall on its own weight and produce a smooth flowing form. Hence, drapeability of a fabric refers to the manner in which the fabric falls, shapes, gathers or flows with gravity on the model form or human body, as well as on furniture and wall hangings, when only part of it is directly supported (Cusick, 1961). Each fabric drapes differently and the folding takes a complex three-dimensional form with double curvature.…”

A Two-Dimensional Gradient-Elasticity Theory for Woven Fabrics

“…Experiments on fabrics [21,22] are invariably limited to small extensional fiber strains, and indicate that the shear energy is relatively insensitive to the shear angle γ at small angles, while increasing sharply as γ → ±π/2. These limits correspond to fiber collapse, a condition that is not possible in actual fabrics due to the finite widths of the constituent yarns.…”