Enhancement of UHMWPE encapsulation on the ballistic performance of bi-layer mosaic armors

Zhao, Zhongnan; Han, Bin; Zhang, Rui; Zhang, Qi; Zhang, Qiancheng; Ni, Chao; Lu, Tian Jian

doi:10.1016/j.compositesb.2021.109023

Cited by 21 publications

(6 citation statements)

References 36 publications

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“…Encasing the four sides of the core component with a flexible continuous facesheet, unlike the conventional sandwiching facesheet component, may be a viable method to achieve both of these enhancing approaches simultaneously. Previous reports [14][15][16] have designed and experimentally examined a sandwich construction fully encased by a continuous fiberreinforced laminate, which was specifically designed for ballistic performance and showed significant mechanical enhancement relative to its counterpart. To verify this concept, we proposed a sandwich construction assembly comprising Nomex honeycomb core cells that were retrofitted by encasing a continuous composite facesheet.…”

Section: Introductionmentioning

confidence: 99%

Bending response and failure characteristics of nomex honeycomb sandwich with continuous composite facesheet encasement

Ren

Zhou

Gao

2023

Jnl of Sandwich Structures & Materials

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In conventional sandwich construction, the core component is typically made of Nomex honeycomb and sandwiched between two facesheets, a lower and an upper facesheet. To enhance the load-bearing capacity of this Nomex honeycomb core sandwich (NHCS) construction, we propose a NHCS construction that is continuously encased by a composite fabric facesheet on all four sides. We experimentally and numerically examine the bending response of this encased NHCS construction through a three-point bending test. We consider and discuss the effect of the orientation of the honeycomb core component and the formation of the facesheet separately to reveal the mechanism by which the composite facesheet encasing enhances the construction. Our results demonstrate that composite facesheet encasing significantly improves the bending response of the NHCS construction, with a much greater advantage than the increase in mass compared to conventional sandwich construction. The superiority of the encased composite facesheet is significantly influenced by the orientation of the honeycomb cell and the direction of the fiber ply-stacked laminate facesheet. In addition, we compare the bending response of the encased honeycomb sandwich construction with that of competing sandwiches and show that the proposed sandwich with a continuously encased composite facesheet has a superior lightweight advantage.

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Section: Introductionmentioning

confidence: 99%

Bending response and failure characteristics of nomex honeycomb sandwich with continuous composite facesheet encasement

Ren

Zhou

Gao

2023

Jnl of Sandwich Structures & Materials

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“…5,6 Among the pool of polymers, ultrahigh molecular weight polyethylene (UHMWPE) is extensively explored for biomedical [7][8][9] and ballistic applications. [10][11][12][13][14][15][16] Owing to high tensile strength and flexibility, UHMWPE has a low melting temperature (<155 C) and is viscoelastic, thus can only be utilized in a low-temperature window. 17,18 VO 2 -based UHMWPE polymer composite was recently explored for its high-temperature mechanical strength by the split Hopkinson pressure bar test by Verma et al 19 It was shown that above 75 C, the VO 2 -based UHMWPE exhibits increased dynamic mechanical strength, because of the phase transition of VO 2 from monoclinic to tetragonal, consequently leads to an increase in elastic modulus and hardness.…”

Section: Introductionmentioning

confidence: 99%

“…A wide variety of polymer composites are commercially available for such uses however polymers are known to be sensitive to temperature and strain rate as they are viscoelastic in nature 5,6 . Among the pool of polymers, ultrahigh molecular weight polyethylene (UHMWPE) is extensively explored for biomedical 7–9 and ballistic applications 10–16 . Owing to high tensile strength and flexibility, UHMWPE has a low melting temperature (<155°C) and is viscoelastic, thus can only be utilized in a low‐temperature window 17,18 …”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations of VO₂‐UHMWPE polymer composite plates across phase change temperature

Shakir,

Verma,

Balakrishnan

et al. 2023

Polymer Composites

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In the present study, experimental and numerical investigations are carried out on Vanadium dioxide (VO2)‐UHMWPE composite plates while considering the temperature across phase change. VO2 is known for semiconducting to metallic transition along with structural changes from monoclinic to tetragonal during heating above 68°C, which enhances structural stiffness. For the experimentation, VO2‐UHMWPE composite samples are fabricated by employing the Hot‐Press method. These samples are further utilized to perform the compression test in order to find Young's moduli at room temperature (RT) and 75°C (temperature across phase change) using a Universal Testing Machine (UTM). Based on the experimentally computed Young's moduli, the numerical investigations in terms of free vibration and bending analyses, are performed. For structural kinematics, a C0‐continuous higher‐order shear deformation theory (HSDT) is employed, and the governing equations are derived using the Lagrange model. The numerical results, that is, natural frequencies and center deflection, are assessed using the finite element method (FEM). The convergence and comparison studies are accomplished to ensure the performance and competence of the present numerical model within the framework of MATLAB and ABAQUS. The influence of temperature, thickness ratio, boundary conditions, etc. on the frequency and deflection of the bare UHMWPE polymer and VO2‐UHMWPE plates, is discussed in detail. Based on the results, it can be concluded that the VO2 reinforcement to the UHMWPE polymer improves structural stiffness at a temperature of 75°C. Moreover, VO2‐UHMWPE composite can be utilized for structural applications, wherein lightweight and high‐temperature resistive material is desired.Highlights The fabrication of the VO2‐UHMWPE composite samples is accomplished through the Hot‐Press method. Young's moduli of the VO2‐UHMWPE composites at RT and 75°C are assessed utilizing UTM. The finite element method is employed to analyze the behavior of the bare UHMWPE polymer and VO2‐UHMWPE plates in free vibration and bending. The effect of influencing parameters such as temperature, thickness ratio, boundary conditions, etc., on natural frequency and deflection of the plates are explored.

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“…Recently, researchers also studied other types of hybrid structures consisting of infilled ceramics and metal lattice frames, such as pyramid lattice [17,18], hexagonal honeycomb lattice [19], and derivative honeycombs [20]. Meanwhile, researchers also performed various types of experimental [21], numerical [22,23], fabrication process [24,25], and theoretical studies [26,27] on the design, and performance evaluation of metal-ceramic lattices for dynamic impact resistance applications.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on the Mechanical Performances of Auxetic Metal-Ceramic Hybrid Lattice under Quasi-Static Compression and Dynamic Ballistic Loading

et al. 2023

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In recent years, there have been increasing research interests in investigating the compression and ballistic responses of metal-ceramic hybrid structures, mainly making use of the synergistic effects of conventional metal honeycomb structures and infilled ceramic matrix materials. In this paper, a novel hybrid auxetic re-entrant metal-ceramic lattice is designed and manufactured to overcome the intrinsic conflicts between the strength and toughness of architected mechanical metamaterials, synergistic effects of auxetic re-entrant metal honeycombs and infilled ceramic materials are experimentally and numerically studied, and auxetic deformation features and failure modes are characterized with the digital image correlation (DIC) technique as well. It was found that (1) the infilled ceramic matrix of conventional honeycomb frames only endure longitudinal compression or impact loading along the external loading direction, while auxetic metal re-entrant honeycomb components endure both longitudinal and transverse loading due to the negative Poisson′s ratio effect and (2) the collaborative effects of infilled auxetics and the constraint frames’ hybrid structure dramatically moderate the stress concentration state and improve the impact resistance of single-phase ceramic materials. Our results indicate that the auxetic hybrid design exhibits promising industrial application potentials for blast protection engineering.

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Enhancement of UHMWPE encapsulation on the ballistic performance of bi-layer mosaic armors

Cited by 21 publications

References 36 publications

Bending response and failure characteristics of nomex honeycomb sandwich with continuous composite facesheet encasement

Bending response and failure characteristics of nomex honeycomb sandwich with continuous composite facesheet encasement

Experimental and numerical investigations of VO₂‐UHMWPE polymer composite plates across phase change temperature

Experimental Investigations on the Mechanical Performances of Auxetic Metal-Ceramic Hybrid Lattice under Quasi-Static Compression and Dynamic Ballistic Loading

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Enhancement of UHMWPE encapsulation on the ballistic performance of bi-layer mosaic armors

Cited by 21 publications

References 36 publications

Bending response and failure characteristics of nomex honeycomb sandwich with continuous composite facesheet encasement

Bending response and failure characteristics of nomex honeycomb sandwich with continuous composite facesheet encasement

Experimental and numerical investigations of VO2‐UHMWPE polymer composite plates across phase change temperature

Experimental Investigations on the Mechanical Performances of Auxetic Metal-Ceramic Hybrid Lattice under Quasi-Static Compression and Dynamic Ballistic Loading

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Experimental and numerical investigations of VO₂‐UHMWPE polymer composite plates across phase change temperature