For a nylon fabric bent along a line at an angle θ to the direction of the warp threads, the variation in the time-de pendent bending-relaxation rigidity was determined as a function of θ. A previously derived relationship enabled a successful separation of the rigidity into a component due to fiber bending and a component due to fiber torsion. Re covery curves obtained experimentally were found to be almost independent of angle θ and were successfully predicted from a previous model in which the fabric is considered as an anisotropic linear viscoelastic sheet with an internal frictional moment. The component on nonrecovery due to friction was found to be independent of θ.
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References
1.
Chapman, B.M. , The Bending and Creasing of Multicomponent Viscoelastic Fiber Assemblies. Part III: The Mechanics of a Two-Dimensional Assembly of Generalized Linear Viscoelastic Fibers of Different Types, Textile Res. J.44, 306-309 (1974).
2.
Chapman, B.M. , TheBending Stress Relaxation of Wool, Nylon 66, and Terylene Fibers, J. Appl. Polym. Sci.17, 1693-1713 (1973 ).
3.
Chapman, B.M. , A Model for the Crease Recovery of Fabrics , Textile Res. J.44, 531-548 (1974).
4.
Chapman, B.M. , AnApparatus for Studying the Rheological Properties of Fabrics and Films in Bending, Textile Res. J.44, 396-397 (1974).
5.
Skelton, J., A. Theoretical and ExperimentalInvestigation of the Stiffness and Crease Recovery of Monofilament Fabrics , J. Textile Inst.57, 505-519 (1966).
