Ballistic Impact of Textile Structures

Abstract

Previous work on transverse impact of single textile fibers is reviewed and extended to model orthogonal weaves in which fiber crossovers are simplified as pin. joints. A dynamic finite-element computer technique previously developed for single fibers is extended to model the woven panel, and this method is shown to produce results which are in sub stantial agreement with experimental observations of ballistic nylon panels. Impact of a woven textile panel is shown to exhibit substantial differences compared to the equivalent impact of a single fiber, primarily in that the propagating strain waves experience pervasive and complex interactions due to the influence of the fiber crossovers. The vast majority of ballistic energy is seen to be deposited in the orthogonal fibers passing through the impact point, while the other fibers are essentially ineffective, which suggests possible improvements in the design of textile structures intended for dynamic impact applications.

Dynamic behaviour of silks: Nature’s precision nanocomposites

“…The situation is represented in Fig. 1 (after [14]). The fibre is initially under tension T 0 , and the passage of the longitudinal wavefront increases the tension by T 1 .…”

Impact of woven fabric: Experiments and mesostructure-based continuum-level simulations

“…Although complex, the mechanics of ballistic impact of yarns and woven fabrics is well characterized in the literature by Smith et al (1956), Roylance et al (1973), Roylance (1980), and Ting et al (1998), among others. When a projectile strikes a woven fabric, longitudinal strain waves propagate along the primary yarns away from the point of impact.…”

“…Roylance et al (1973) modeled the fabric as a planar array of point masses connected by massless, pin-joined trusses. The model of Roylance et al has been extended to account for nonlinear viscoelastic yarn behavior (Roylance and Wang, 1978;Shim et al, 1995), yarn slip (Roylance et al, 1995;Termonia, 2004;Tan and Ching, 2006), and crimp interchange (Ting et al, 1998;Tan et al, 2005).…”

Effects of layer stacking order on the V50velocity of a two-layered hybrid armor system

“…Earlier efforts to model the performance of a multilayered fibrous soft body armor system focused on either extrapolating results from a single layer system or assuming sequential failure through widely spaced layers where only one layer at a time engages the projectile, that is, a decoupled system [Roylance et al 1973;Hearle et al 1981;1984;Taylor Jr. and Vinson 1989;Parga-Landa and Hernandez-Olivers 1995;Chocron-Benloulo et al 1997;Cunniff 1999a;1999b;1999c;Billon and Robinson 2001;Zohdi 2002;Zohdi and Powell 2006]. Recently the authors have developed analytical models in which layers respond to the impact of a projectile in a coupled and synergistic manner, as they do in reality, but the layers are arranged in such a way that they form nested cones but without interference in the cone wave region or elsewhere [Phoenix and Porwal 2003;Porwal and Phoenix 2005].…”