Topic
Kevlar
About: Kevlar is a research topic. Over the lifetime, 1794 publications have been published within this topic receiving 30193 citations. The topic is also known as: poly-paraphenylene terephthalamide.
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TL;DR: In this paper, a simple model was developed to explain the bi-linear behavior and to provide the basis for geometrical scaling of composite ballistic perforation data, and also to help with the interpretation of material parameter and bond strength influences on ballistic resistance.
151 citations
TL;DR: In this paper, a semi-empirical model is presented for predicting the yam pull-out force and energy as a function of pullout distance, including yarn uncrimping and subsequent yam translation.
Abstract: Yarn pull-out can be an important energy absorption mechanism during the ballistic impact of woven Kevlar® fabric. This study reports the effects of fabric length, number of yarns pulled, arrangement of yarns, and transverse tension on the force-displacement curves for yam pull-out tests on Kevlar® KM-2 fabric under laboratory conditions. A semi-empirical model is presented for predicting the yam pull-out force and energy as a function of pull-out distance, including both yarn uncrimping and subsequent yam translation. This model is found to replicate the experimental data with a high degree of accuracy, and should prove useful for understanding ballistic experiments and improving computational modeling of fabrics.
148 citations
TL;DR: In this article, the authors reported experimental and numerical simulation of ballistic impact problems on thin composite laminated plates reinforced with Kevlar 29. They used a commercial code based on finite differences and values obtained are compared with the experimental data to evaluate the performance of the simulation.
148 citations
TL;DR: In this paper, the deformation and energy absorption modes of shear thickening fluid (STF) treated and untreated Kevlar woven fabrics upon impact has been presented, and it was found that only the primary yarns, which are engaged by the impactor, participate in load sharing and hence energy absorption.
147 citations
25 Nov 2011-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the impact energy absorption capacity of Kevlar woven fabrics has been improved using silica particle-based shear thickening fluid (STF), and the influence of padding pressure and silica concentration in STF on add-on%, yarn pull out force and impact energy absorbing has been studied.
Abstract: Impact energy absorption capacity of Kevlar woven fabrics has been improved using silica particle based shear thickening fluid (STF). The influence of padding pressure and silica concentration in STF on add-on%, yarn pull out force and impact energy absorption has been studied. Higher padding pressure reduces the STF add-on%, but increases the impact energy absorption. Therefore, it is possible to achieve enhanced impact energy absorption performance at lower STF add-on%, i.e. lower fabric weight. It is also understood that the yarn to yarn friction, as measured by the quasi-static yarn pull-out force, only partially influences the impact performance of STF treated Kevlar woven fabrics.
144 citations