Evaluation of Shear-Thickening-Fluid Kevlar for Large-Fragment-Containment Applications

Rabb, Robert J.; Fahrenthold, Eric P.

doi:10.2514/1.c031081

Cited by 22 publications

(16 citation statements)

References 10 publications

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“…fabric edges, and are evaluated on an areal density basis, the last cited experiments do not establish STF Kevlar as a suitable fragment barrier material. In contrast with the aforementioned performance claims, other experimental work has suggested that STF Kevlar ballistic performance may be boundary condition dependent, and that STF Kevlar performance is at best areal density equivalent to neat Kevlar [12,23]. Note that the last two cited references describe experiments involving multilayer fabric targets, both clamped and free edge boundary conditions, a wide range of projectile types, and an extremely wide range of impact velocities.…”

Section: Evaluation Of Shear-thickening Fluid Kevlarmentioning

confidence: 85%

“…A recent paper by the material developers suggests that STF Kevlar ballistic performance may be both projectile-and fabric-dependent [22], while the authors have suggested that target boundary conditions are also important [12]. Despite these uncertainties, there appears to be a general consensus that the dissipation mechanisms of principal interest are friction and viscosity.…”

Section: Bingham Fluid Modelmentioning

confidence: 97%

“…The numerical methods and constitutive models described in the preceding sections were evaluated by simulating a set of large fragment experiments [12] in which aluminum cylinder and steel disk projectiles impacted multilayer neat and STF Kevlar targets at a velocity of 1000 ft=s. It appears that this data set represents the only published systematic experimental investigation directly comparing neat and STF Kevlar performance under impact conditions broadly representative of the fan blade containment application of principal interest in this research.…”

Section: Impact Simulationsmentioning

confidence: 99%

“…This paper presents the first evaluation of hybrid-particle-element methods in the simulation of large fragment impacts. It models a series of published experiments [12] involving two different projectile types, two different fabric boundary conditions (BCs), and target thicknesses as high as 24 fabric layers. In addition, this paper develops the first general computational model of high-performance fabrics treated with a shear-thickening fluid (STF) augmentation [13], and it evaluates that model by simulating a similar series of large fragment impact experiments.…”

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confidence: 99%

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Simulation of Large Fragment Impacts on Shear-Thickening Fluid Kevlar Fabric Barriers

Rabb

Fahrenthold

2011

Journal of Aircraft

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Section: Evaluation Of Shear-thickening Fluid Kevlarmentioning

confidence: 85%

Section: Bingham Fluid Modelmentioning

confidence: 97%

Section: Impact Simulationsmentioning

confidence: 99%

mentioning

confidence: 99%

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Simulation of Large Fragment Impacts on Shear-Thickening Fluid Kevlar Fabric Barriers

Rabb

Fahrenthold

2011

Journal of Aircraft

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“…Further work on STF was to improve the ballistic performance of fabric impregnated by STF at different load cases [12][13][14][15][16][17][18][19]. Feng et al [18] illustrated the stab resistant properties of fabrics impregnated with STF with sub-micrometer silica and fumed silica particles on quasi-static loading.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of symmetrical and asymmetrical sandwich plates with shear thickening fluid core subjected to penetration loading

Tan

Zuo

et al. 2016

Materials & Design

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. (2016). Dynamic response of symmetrical and asymmetrical sandwich plates with shear thickening fluid core subjected to penetration loading. Materials and Design,[94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][110] Dynamic response of symmetrical and asymmetrical sandwich plates with shear thickening fluid core subjected to penetration loading AbstractSymmetrical and asymmetrical sandwich plates with a shear thickening fluid (STF) core were designed to be penetrated by a cylindrical projectile at various impact velocities. These STFs consist of SiO2/PEG400, and the volume fractions of SiO2 nano-particles are 54% and 56%, respectively. Failure mode of the rear face sheet of the symmetrical sandwich plate is petal perforation, but the rear face sheet of the asymmetrical sandwich plate failed in plug perforation mode at the velocity of less than 80 m/s and in the petal perforation mode at the velocity faster than 90 m/s. The results showed that both the face sheet and the STF core played different roles in impact resisting properties and energy absorption of the sandwich plate at different impact velocities. The thickness of the rear sheet has a significant influence on the energy absorption at low impact velocity, while this influence can be ignored at high impact velocity. The effects of the particle volume fraction, impact velocity and thickness of rear face sheet on the deformation mechanism and energy absorption of the sandwich plate were also discussed. Abstract: Symmetrical and asymmetrical sandwich plates with a shear thickening fluid (STF) core were designed to be penetrated by a cylindrical projectile at various impact velocities. These STFs consist of SiO 2 /PEG400, and the volume fractions of SiO 2 nano-particles are 54% and 56%, respectively. Failure mode of the rear face sheet of the symmetrical sandwich plate is petal perforation, but the rear face sheet of the asymmetrical sandwich plate failed in plug perforation mode at the velocity of less than 80 m/s and in the petal perforation mode at the velocity faster than 90 m/s. The results showed both the face sheet and the STF core played different roles in impact resisting properties and energy absorption of the sandwich plate at different impact velocities. The thickness of the rear sheet has a significant influence on the energy absorption at low impact velocity, while this influence can be ignored at high impact velocity. The effects of the particle volume fraction, impact velocity and thickness of rear face sheet on the deformation mechanism and energy absorption of the sandwich plate were also discussed. Disciplines Engineering | Science and Technology Studies

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High‐velocity impact performance of shear‐thickening fluid/kevlar composites made by the padding process

et al. 2018

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Padding is known to enhance the dyeing of fabric. In this study, shear‐thickening fluid (STF)/multilayer Kevlar composites were constructed through a padding process. This paper describes the padding process used, and discusses the ballistic impact and stab resistance of the resulting composites. Padding STF into Kevlar fabric is better than impregnation. The resulting composites are thinner, lighter, and more flexible than conventional Kevlar body armor, while providing similar protection. Previous studies have shown that padding improves the low‐velocity impact resistance of single‐layer Kevlar. This study demonstrates that padding also improves the high‐velocity impact performance of STF/multilayer Kevlar composites. POLYM. COMPOS., 40:3040–3049, 2019. © 2018 Society of Plastics Engineers

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Evaluation of Shear-Thickening-Fluid Kevlar for Large-Fragment-Containment Applications

Cited by 22 publications

References 10 publications

Simulation of Large Fragment Impacts on Shear-Thickening Fluid Kevlar Fabric Barriers

Simulation of Large Fragment Impacts on Shear-Thickening Fluid Kevlar Fabric Barriers

Dynamic response of symmetrical and asymmetrical sandwich plates with shear thickening fluid core subjected to penetration loading

High‐velocity impact performance of shear‐thickening fluid/kevlar composites made by the padding process

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