Study of energy absorption and failure modes of constituent layers in body armour panels

Yang, Yanfei; Chen, Xiaogang

doi:10.1016/j.compositesb.2016.04.071

Cited by 42 publications

(16 citation statements)

References 16 publications

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“…Fabrics based on high-performance polymeric fibers such as Kevlar, Twaron, and Dynama fibers are among the advanced materials used in modern body armor designs. Energy absorption and ballistic resistance of such materials have been extensively investigated via experiments and analytical methods [4,5]. From the point view of energy transfer, it can be stated that when a projectile impacts a fabric, the projectile kinetic energy is dissipated through a combination of mechanisms such as tension in primary yarns, deformation of fabric, energy dissipated through frictional slips (yarn/yarn and projectile/yarn), yarn breakage, and yarn pull-out from the fabric [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

High velocity impact behavior of Kevlar/rubber and Kevlar/epoxy composites: A comparative study

Khodadadi

Liaghat

Bahramian

et al. 2019

Composite Structures

100

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This paper presents a comparison of behavior and energy absorption of neat Kevlar fabric and polymer matrix composites under high velocity impact loading. Two types of matrices including rubber and thermoset (epoxy) matrices were used in order to study the effect of a hard and brittle matrix compared with the soft and flexible matrix on energy absorption of the composite. Moreover, two types of rubber matrix with high hardness (HH) and low hardness (LH) were used in this study to investigate the effect of rubber matrix formulation on impact resistance of composites. Ballistic impact tests were performed by firing a 10 mm hemispherical projectile onto neat fabric and composites in a velocity range of 30 m/s to 150 m/s for two-and four-layer samples. Results show that the matrix affects the ballistic performance of composites significantly. Rubber matrix enhances the energy absorption of the fabric by keeping composite flexibility. Increase the number of layers for Kevlar/rubber composite results in better ballistic performance. On the contrary, the thermoset matrix leads to an inflexible composite that restricts the fabric deformation and has a negative effect on the fabric's ballistic performance. Finally, damage mechanisms were discussed in detail for each sample.

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Section: Introductionmentioning

confidence: 99%

High velocity impact behavior of Kevlar/rubber and Kevlar/epoxy composites: A comparative study

Khodadadi

Liaghat

Bahramian

et al. 2019

Composite Structures

100

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“…As a result, energy absorption of each layer is increased from front to back in the panel. In our previous studies [10][11][12], it was found that when a multilayer panel is under ballistic impact, energy absorption of each layer is increased from the front layer to the peak value at the last perforated layer and then gradually decreased in following back layers of the panel. Such pattern has not been influenced by the total number of layers in the panel.…”

Section: Introductionmentioning

confidence: 99%

“…Our previous studies focus on identifying a general energy absorption distribution in a multilayer armour panel at different ballistic impact conditions [10,11]. This study aims to further quantify energy absorption efficiency of each layer, and propose a new hybrid design…”

Section: Introductionmentioning

confidence: 99%

Investigation on energy absorption efficiency of each layer in ballistic armour panel for applications in hybrid design

Yang

Chen

2017

Composite Structures

Self Cite

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This study aims to reveal different energy absorption efficiency of each layer when armour panel is under ballistic impact. Through Finite Element (FE) modelling and ballistic tests, it is found that when fabrics are layered up in a panel, energy absorption efficiency is only 30%-60% of an individual fabric layer with free boundary condition. In addition, fabric layers in front, middle, and back exhibit different ballistic characteristics. Therefore, a new hybrid design principle has been proposed. A multilayer panel can be divided into three groups. Two hybrid panels that are combined different Twaron fabrics and Dyneema UD laminates are designed. Ballistic tests results show that for a given areal density of the panel, BFS behind the hybrid panel decreases 31.54% than that of the woven fabric panel. When the areal density of armour panel is reduced, the hybrid panel is more likely to stop the projectile. These findings provide a guide for hybrid design of ballistic armour panel.

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“…They have low curb weight, high specific strength, and a high ability to absorb ballistic impact energy. These composites are used to make vests [19] and helmets [20,21], as well as light covers of military and civilian vehicles [22,23]. An important factor determining the behavior of a composite during impact is its matrix.…”

Section: Introductionmentioning

confidence: 99%

X-ray Computed Tomography for the Development of Ballistic Composite

et al. 2020

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This paper presents the results of research on ballistic panels made of polymer–matrix composites (PMCs). The analysis covers two types of composites produced by the authors based on high-density polyethylene (PEHD) and polypropylene (PP) reinforced with aramid fabric. Ballistic tests were carried out with the use of two types of projectile: 0.38 Special, and 9 × 19 Parabellum, which are characterized by different velocity and projectile energy. The study presents the X-ray computed tomography (XCT) analysis for structure assessment of ballistic panels and its impact behavior, further compared to the results of computer simulations conducted using the numerical analysis. The quality of the manufactured panels and their damage caused by a ballistic impact was assessed using a multi-scale geometry reconstruction. The mesoscale XCT allowed the internal composite geometry to be analyzed, as well as a unit cell of the representative volume element (RVE) model to be built. The RVE model was applied for homogenization and finite element (FEA) simulation of projectile penetration through the ballistic panel. The macroscale XCT investigation allowed for the quantitative description of the projectile’s impact on the degree of delamination and deformation of the panels’ geometry.

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Study of energy absorption and failure modes of constituent layers in body armour panels

Cited by 42 publications

References 16 publications

High velocity impact behavior of Kevlar/rubber and Kevlar/epoxy composites: A comparative study

High velocity impact behavior of Kevlar/rubber and Kevlar/epoxy composites: A comparative study

Investigation on energy absorption efficiency of each layer in ballistic armour panel for applications in hybrid design

X-ray Computed Tomography for the Development of Ballistic Composite

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