Estimation of Fabrics Dynamical Stiffness and Damping in Sewing Garments

Abstract

Aestetic appearance of sewing garment in many cases determinated by quality of their appearance, which is effected by different factors. In the sewing process a fabric is deformed by certain dynamical forces. Quality assessment based on the alterations of sewing garment deformation may be performed not only in the sewing process, but in the certain period of time after sewing, as well. The stiffness and internal friction - damping decide this process. This article analyses the stiffness and damping characteristics of various fabrics - cotton, linen, wool, silk, polyester and acetate. The fabrics specimens were tested in warp, weft and bias directions. Amplitude versus frequency response characteristics of the fabrics obtained by the method of resonace oscillations allows to evaluate the dynamical stiffness and damping coefficients of the fabric in the zone of elastics deformation.