Studies on the Cylindrical Shell Buckling of Weft Knit

편성물의 원통형 좌굴에 관한 연구

This is a study on the application of cylindrical shell buckling to weft plain stitch-knit fabrics made of cotton ems, which are related to bending deformations affecting textile products, especially hands and wrinkles of shell type apparel. Following conclusions were derived from the studies of cylindrical shell buckling under axial compressions and from the considerations of applicability of buckling theories to typical orthotropic knit fabric supposing as thin homogenous isotropic shell. 1. An apparatus for preparing and clamping specimens, and experimental methods were designed to be possible to measure cylindrical shell buckling properties under the action of uniform axial compression with a general strength tester. 2. Comparing the tendencies of critical buckling stresses to the various yarn numbers and cover factors of weft knit fabrics with the theoretical critical buckling stresses, the absolute values were found to be about 60℃ of theoretical values. 3. Bending stiffnesses calculated with the young's modulus obtained from buckling experiments were found to be fitted approximately with the results form pure bending tester.