Ballistic performance of kevlar fabric panels containing shear

Ballistic performance of kevlar fabric panels containing shear

Numerical Investigation of Ballistic Performance of

A panel of all neat Kevlar fabrics and two hybrid panels of neat and STF impregnated Kevlar fabrics were tested against 9 mm ... predictions of fabric ballistic performance are compared to ...

Energy Absorption of Nano-Reinforced and Sandwich

static, ballistic and low velocity impact punch-shear tests to define the elastic and absorbed energies of composites as a function of penetration displacement. Shaker et al. [4] studied the failure mechanism of basket weave and 3-D braided Kevlar-fabriclow and

Ballistic performance of p-aramid fabrics impregnated

21/2/2012· The objective of this research was to characterize the ballistic performance of p-aramid fabrics impregnated with shear thickening fluid (STF) focusing on the fabric count and shot location.Panels made of fabrics with different fabric counts were tested against 9 mm ...

(PDF) Experimental and numerical analysis of penetration

the ballistic performance of the Kevlar fabric. The absence of silica particles and the presence of PEG reduce inter-yarn friction, making it easier for yarns to be pulled toward ...

European Journal of Mechanics A/Solids

terise the ballistic performance of fibre composite plates as this velocity is independent of the shear properties of the composites: the ballistic limit of fibre composite plates increases with decreasing matrix shear strength for both CFRP and UHMWPE plates.

Composites Containing Aluminosilicates Modified with

23/8/2020· The Kevlar/epoxy composites containing 1.0 or 3.0 wt.% modified bentonites were fabricated using the hand lay-up technique. The mechanical properties, including the tensile, flexural, and in-plane shear strength, ...

Appendix G: Failure Mechanisms of Ballistic Fabrics and

Read chapter Appendix G: Failure Mechanisms of Ballistic Fabrics and Concepts for Improvement: Armor plays a significant role in the protection of warrior... fibers were strain-rate-insensitive materials. Wang and Xia 6 observed that for Kevlar 49 fiber, at a fixed strain rate, the initial tensile modulus decreased and elongation at break increased with the increase in test temperature.

The Influence of the Particle Size of Silica on the Ballistic Performance of Fabric

Ballistic Performance of Fabrics Impregnated with Silica Colloidal Suspension 3 Downloaded from jcm.sagepub.com at PENNSYLVANIA STATE UNIV on September 12, 2016 samples were heated to 80 C for 1h in an oven to evaporate the methanol.

Kevlar - Wikipedia

Kevlar is a heat-resistant and strong synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965,[1][2][3] this high-strength material was used first commercially in the early 1970s as a replacement for steel in racing tires. Typically it is spun into ropes or fabric sheets that can be ...

Ballistic performance of Kevlar fabric impregnated with

1/4/2019· Ballistic performance of Kevlar fabric impregnated with nanosilica/PEG shear thickening fluid ... with 35 wt. % STF is 24.28 Jm 2 /Kg which is nearly equal to two times greater than the SEA of a neat four layer fabric. Also, STF/Kevlar composite containing 15 ...

Evaluation of ballistic performance of STF impregnated

1/11/2019· Shear thickening fluid (STF) impregnated fabrics offer improved ballistic performance against impacts, but the effect becomes not obvious at high impact velocity (e.g. 300 m/s) as reported by some. This paper presents findings from an investigation of STF ...

Numerical and experimental investigations into ballistic

1/3/2014· This suggested that using shear resistant materials for the front layer and tensile resistant materials for the rear layer may improve the ballistic performance of fabric panels. Two types of structure, ultra-high-molecular-weight polyethylene (UHMWPE) woven and unidirectional (UD) materials, were analyzed for their failure mode and response upon ballistic impact by using both FE and ...

Finite-element-based Fiber-length-scale Modeling of the

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 ...

DEVELOPMENT OF KEVLAR COMPOSITES FOR BALLISTIC

The performance of the composite under gunshot test for polyester reinforced kevlar fabrics of the composite was performed in a 3 different samples. The target is composed of a ballistic plate, a vest structure and a polyurethane foam. After gun shot test all parts

(PDF) Ballistic performance of p-aramid fabrics

The objective of this research was to characterize the ballistic performance of p-aramid fabrics impregnated with shear thickening fluid (STF) focusing on the fabric count and shot location.

Evaluation of ballistic performance of STF impregnated

1/11/2019· Shear thickening fluid (STF) impregnated fabrics offer improved ballistic performance against impacts, but the effect becomes not obvious at high impact velocity (e.g. 300 m/s) as reported by some. This paper presents findings from an investigation of STF ...

Investigation of the ballistic performance of Ultra High

Ballistic performance of Nylon 6,6 was also compared with the performance of Kevlar 29 in Figucia et al. [5]. The authors observed that tensile yarn straining was the main energy dissipating mechanisms in the tested fabrics, while the strain wave velocity was ...

The effec t of shear strength on the ballistic response of

While this study has demonstrated the effect of the composite shear strength on the ballistic performance, no mechanistic models to explain this dependence has, as yet, been proposed. This remains a topic for future research.

Energy Absorption of Nano-Reinforced and Sandwich

The ballistic and punch-shear response of nanoparticle reinforced vinyl ester panels, laminated face sheets and sandwich composites has been investigated in the present work. NIJ level III Standard [7] was adopted for the high velocity ballistic tests where a universal receiver equipped with a barrel was used to launch 0.308 caliber M80 ball round projectile at about 890 m/s.

Effect of Graphene Oxide Coating on Natural Fiber

In spite of the comparable ballistic performance to a same thickness Kevlar laminate as MAS second layer, the integrity of a NLF composite is always questionable. Lower amounts, usually less than 30 vol%, of fiber were found to result in composite4,5,8,9,11,,

Polymers Free Full-Text Composites with Natural Fibers

26/8/2020· Ballistic tests were conducted by inserting a PALF composite with a ceramic front layer, as a hard armor plate in a ballistic vest level IIIA, which was simulated by placing 12 layers of Kevlar S745 fabric, supplied by LFJ Blindagens (Brazil), on the back face of the armor plate. ...

Energy Absorption in a Shear-Thickening Fluid - Journal

This study investigates energy absorption in a shear-thickening fluid (STF) containing nano-size fumed silica as a suspending material. Fumed silica particles in 20, 30, and 40 wt.% were used in polyethylene glycol and ethylene glycol. Three areas were studied, namely: energy absorption of STF pre-impregnated aramid fabric, neat STF under high-velocity impact, and flexible foam soaked in ...

Effect of Particle Hardness on the Penetration Behavior of Fabrics

ABSTRACT The penetration behavior of Kevlar fabric intercalated with dry particles and shear thickening fluids (STF), highly concentrated fluid-particle suspensions, is presented. In particular, the role of particle hardness is explored by comparing fabric

Effects of Weave Type on Ballistic Performance of

Role of Fabric Geometry in Ballistic Performance of Flexible Armour Panels Procedia Engineering, Vol. 173 Shear thickening fluids using silica-halloysite nanotubes to improve the impact resistance of p-aramid fabrics

Performance of Natural Rubber Coated Fabrics under Ballistic

improve the ballistic impact performance of ballistic fabrics [5,6]. Lee et al. [5] studied the ballistic resistance of Kevlar KM-2 fabrics impregnated with silica particles dispersed in ethylene glycol (shear thickening fluid, STF). They [5] examined different

The ballistic performance of aramid based fabrics

1/12/2017· 1. Introduction High performance fabrics are extensively utilized to provide protection from fragment and ballistic threats without significantly limiting the mobility of users , , .Aramid based fabrics such as Twaron, Kevlar, Technora and Ultra High Molecular Weight ...

Effects of Weave Type on Ballistic Performance of Fabrics

Role of Fabric Geometry in Ballistic Performance of Flexible Armour Panels Procedia Engineering, Vol. 173 Shear thickening fluids using silica-halloysite nanotubes to improve the impact resistance of p-aramid fabrics

Numerical and Experimental Comparative Analysis of

1 Introduction Multiaxial fabrics are perspective textile structures for use in soft ballistic packages. Existing research shows that the geometrical structure of the fabric, regardless of the raw material used, has a considerable influence on its ballistic effectiveness [1,2,3,4,5,6].].

Effect of Panel Construction on the Ballistic Performance of

polymers Article Effect of Panel Construction on the Ballistic Performance of Multiply 3D through-the-Thickness Angle-Interlock fabrIc Reinforced Composites Shengnan Min 1,*, Yuan Chai 2, Yanyan Chu 3 and Xiaogang Chen 4 1 Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of ...

Effect of Particle Hardness on the Penetration Behavior of

The penetration behavior of Kevlar fabric intercalated with dry particles and shear thickening fluids (STF), highly concentrated fluidparticle suspensions, is presented. In particular, the role of particle hardness is explored by comparing fabric treatments containing ...

Frequently Ballistic performance of kevlar fabric panels containing shear

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