High-Velocity Impact Performance of Aluminum and B4C/UHMW-PE Composite Plate for Multi-Wall Shielding

Lu, Yangyu; Zhang, Qingming; Xue, Yijiang; Liu, Wenjin; Long, Renrong

doi:10.3390/app10020721

Cited by 5 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This structure gives far better protection than fabrics with the same weight [11]. There were many experiments and numerical simulations studying the impact response of UHMWPE laminate [12][13][14][15]; however, the mechanics of resisting impact threats remains poorly understood [16]. To achieve the necessary understanding of the mechanics of resisting impact, it is essential to study the dynamic compressive properties of UHMWPE fiber-reinforced laminate.…”

Section: Introductionmentioning

confidence: 99%

High-Strain-Rate Compressive Behavior of UHMWPE Fiber Laminate

et al. 2020

View full text Add to dashboard Cite

Ultra-high-molecular-weight polyethylene (UHMWPE) fiber laminate is currently widely used in ballistic protection for its exceptional physical and mechanical properties. However, the dynamic compressive mechanism of UHMWPE laminate remains poorly understood. Therefore, the stress–strain relationship, the influence of different thickness, area, and shape, and the maximum stress and fracture stress are studied in both out-of-plane and in-plane directions under quasi-static and dynamic loading using a universal test machine, Split Hopkinson pressure bar (SHPB), and high-speed camera. Furthermore, numerical models with cohesive elements are developed. The results indicate a dependency on strain rate and loading direction. Firstly, the stress–strain curve of dynamic testing can be divided into different zones according to different loading directions and strain rates. Secondly, with the increase of the strain rate in the dynamic testing, the maximum stress and fracture stress increase as well; relatively speaking, the fracture stress in the out-of-plane direction is greater than the fracture stress in the in-plane direction. Thirdly, both experiment and simulation indicate that the thickness does not influence the modulus clearly the in out-of-plane direction but influences the modulus in the in-plane direction. Fourthly, the fracture stress of dynamic testing is higher than the fracture stress of quasi-static testing in both directions. Finally, the numerical results show good agreement with the experiment in terms of the maximum stress and failure form.

show abstract

Section: Introductionmentioning

confidence: 99%

High-Strain-Rate Compressive Behavior of UHMWPE Fiber Laminate

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The split Hopkinson bar [1] has been widely used for extracting material properties such as the parameters of strain rate-dependent constitutive models [2,3] which, in turn, are used for the simulation of high strain-rate events such as high-speed transportation crashes, high-speed machining, rock/building blasts, blast impacts, earthquake impacts, ricochets and penetrations [4][5][6][7], and explosions. While the original inception of the split Hopkinson bar was based on the compressive mode [1,[8][9][10][11], modifications have been made thereafter, including the split Hopkinson tension bar (SHTB).…”

Section: Introductionmentioning

confidence: 99%

Stress Transfer Mechanism of Flange in Split Hopkinson Tension Bar

Shin

Kim

2020

Applied Sciences

View full text Add to dashboard Cite

To reveal the stress transfer mechanism of the flange in a split Hopkinson tension bar, explicit finite element analyses of the impact of the hollow striker on the flange were performed across a range of flange lengths. The tensile stress profiles monitored at the strain gauge position of the incident bar are interpreted on a qualitative basis using three types of stress waves: bar (B) waves, flange (F) waves, and a series of reverberation (Rn) waves. When the flange length (Lf) is long (i.e., Lf > Ls, where Ls is the striker length), the B wave and first reverberation wave (R1) are fully separated in the time axis. When the flange length is intermediate (~Db < Lf < Ls, where Db is the bar diameter), the B and F waves are partially superposed; the F wave is delayed, then followed by a series of Rn waves after the superposition period. When the flange length is short (Lf < ~Db), the B and F waves are practically fully superposed and form a pseudo-one-step pulse, indicating the necessity of a short flange length to achieve a neat tensile pulse. The magnitudes and periods of the monitored pulses are consistent with the analysis result using the one-dimensional impact theory, including a recently formulated equation for impact-induced stress when the areas of the striker and bar are different, equations for the reflection/transmission ratios of a stress wave, and an equation for pulse duration time. This observation verifies the flange length-dependent stress transfer mechanism on a quantitative basis.

show abstract

The impact of boron carbide in soft and hard body armor: A comprehensive evaluation on Kevlar and UHMWPE fabrics

Makaoui,

Mehelli,

Tria

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

In this research, an investigation was conducted to ascertain the impact of boron carbide (B4C) microparticles on soft and hard armor configurations, utilizing two distinct high‐performance fabrics namely, Kevlar and Ultra‐high Molecular Weight Polyethylene (UHMWPE), also this work discerned the optimal fabric for protection against dagger attacks and 9 mm full metal jacket (FMJ) projectiles. Initially, rheological tests on four shear thickening fluid (STF) samples revealed that 70% of nano‐silicate (SiO2) content was the optimal ratio. Besides, scanning electronic microscope (SEM) tests showed that B4C affected the nano‐silicate dispersion. Hence, the use of STF as a matrix, led to complete protection in low‐velocity stab test and behavior improvement when subjected to NIJ ballistic test for both fabric types. On the other hand, the dynamic mechanical analysis (DMA) of the thermosetting epoxy resin‐based composites reinforced by B4C indicated that the 10% ratio offered maximum rigidity, resulting in improved ballistic performance. This study revealed that Kevlar fabrics exhibit superior behavior in soft protection, while UHMWPE hard composite display further rigidity against high‐velocity impacts. Overall, this work contributes novel insights into the efficiency of B4C integration within soft and hard armor configurations using two ballistic fabrics, highlighting their performance characteristics in ballistic shielding.Highlights Investigation of B4C microparticles: The research examines the impact of B4C microparticles on soft and hard armor configurations. High‐performance fabrics: Kevlar and UHMWPE uses. The use of STF as a matrix for soft and thermosetting epoxy resin for hard armor: enhanced composite performance. Low‐velocity and high‐velocity impact tests investigations; microparticles B4C incorporation: superior mechanical characteristics. Remarkable energy absorption: promising shielding uses.

show abstract

High-Velocity Impact Performance of Aluminum and B4C/UHMW-PE Composite Plate for Multi-Wall Shielding

Cited by 5 publications

References 21 publications

High-Strain-Rate Compressive Behavior of UHMWPE Fiber Laminate

High-Strain-Rate Compressive Behavior of UHMWPE Fiber Laminate

Stress Transfer Mechanism of Flange in Split Hopkinson Tension Bar

The impact of boron carbide in soft and hard body armor: A comprehensive evaluation on Kevlar and UHMWPE fabrics

Contact Info

Product

Resources

About