Abstract
In the cyclic plate buckling and shearing of fabrics, two types of load-deformation response have been observed. There are those whose load deformation curves closely reproduce each other upon cycling and those whose curves precess. The former are referred to as "stable" curves, the latter as "unstable" curves.
Unstable curves are obtained on fabrics in which there are large frictional effects and the yarns move appreciable distances during deformation. From energy considera tions, it is shown that fabrics that produce stable curves will recover from' deformation better than those that produce unstable curves. This results because more energy will be stored during deformation and it requires less of the stored energy to overcome frictional effects during recovery in fabrics with stable responses.
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