Finite-element-based Fiber-length-scale Modeling of the Ballistic-Impact Response of KEVLAR® KM2 Fabric

2016-0

Pages 1-15
Author Mica GrujicicS. RamaswamiJ. S. SnipesR. Galgalika
Abstract In the present work, finite-element-based sub-yarn-level modeling of the Kevlar® KM2 ballistic-fabric is carried out in order to help establish the relationships between the fabric penetration resistance and various fiber-level phenomena such as fiber-fiber friction, fiber twist, transverse properties of the fibers and the stochastic nature of fiber strength. In particular, a series of transient non-linear dynamics finite-element analyses was carried out of the transverse impact of a test patch of Kevlar® KM2 fabric by a solid spherical projectile, in order to investigate the role of the following two important sub-yarn phenomena on the penetration resistance of this fabric: (a) fiber-transverse properties including non-linear elastic and plastic response; and (b) stochastic nature of the fiber strength.

The Impact of Lighting on Textile Color: Controlling Quality From the Supply Chain to Retail Display

2016-0

The Impact of Lighting on Textile Color: Controlling Quality From the Supply Chain to Retail Display

Pages 16-28
Author Gallayanee YaoyuneyongMary Ann Moor
Abstract Lighting decisions directly impact costs and sales of textile products, making it important that industry experts and retailers are aware of the significant effect of lighting on apparent textile color in visual displays. In this study, a three-part investigation explored the interaction of illuminants with apparent textile color in terms of the CIELAB color difference variables: L*, a*, and b*. Results demonstrate that use of a single illuminant during instrumental color measurement does not provide adequate or accurate color quality control, since retailers use multiple types of in-store illuminants. The need to investigate LEDs as future retail illuminants is also discussed.