Designing polymer metamaterial for protective armor: a coarse-grained formulation

Varma, T. Venkatesh; Sarkar, Saikat

doi:10.1007/s11012-020-01201-6

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…Concerning metamaterials to enhance energy absorption of suspension component made of soft polymer core involved with ceramic outer plate, e.g. the metamaterials are engineered properties of cellular repeating materials pattern [58][59]. Based on the study done by Varma and Sarkar [59], implementing the 3-modes (bending, shear, and stretch) metamaterial energies expressions [59] into (1) together with ( 15) and ( 21)-( 22), yields the physical relations that appropriate for the case of metamaterials armor penetration case.…”

Section: Monolithic Multilayer (Composite Armor) Penetration Distance Modelmentioning

confidence: 99%

On Analytical Ballistic Penetration Fundamental Model and Design

Nagler¹

2021

1790-5044

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This paper presents a new fresh theoretical study of the ballistic penetration phenomena into hard materials due to low-energy bodies' motion. This model based on the energy balance between the kinetic energy of the piercing body and the protective body thermal energy. Following this equilibrium alongside the equation of the projectile motion, the resulting deceleration value is analytically calculated. Substituting the obtained deceleration value into the kinematic equilibrium results with the penetration thickness expression as well as the time of penetration inside the mono and multi layers materials (like, monolithic and composite materials). In addition, equivalently to the Johnson-Cook model, a proposed impact stress for penetrative and non-penetrative cases was developed. Additionally, a residual velocity expression alongside the evaluation of the total energy and deceleration parameters were also determined. Key parameters are the projectile effective length, which defines the projectile geometry alongside the material strength parameters (heat capacity, Yield, compressive and tensile strengths). Finally, good numerical agreement (order of magnitude and numerical values) has been found between various literature experimental tests and current analytic solution for the kinematic parameters.

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Section: Monolithic Multilayer (Composite Armor) Penetration Distance Modelmentioning

confidence: 99%

On Analytical Ballistic Penetration Fundamental Model and Design

Nagler¹

2021

1790-5044

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“…Their main objective is to provide adequate impact (ballistic) protection for the user who is exposed to the hazards of loss of life or health due to the nature of his or her work. While applying different ballistic and high performance materials, like ceramic tiles composites and generation from the propagation of elastic/stress waves [24]. Colombo et al [25] presented studies of composite layered systems based on monolithic armor ceramic tiles joined with polymer infiltrated ceramic foams which have been designed and evaluated for lightweight ballistic protection.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Impact Resistance Properties of Hybrid Silicone-Ceramics Composites

et al. 2020

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This article presents the method of preparation a new type of ballistic armor based on hybrid silicone-ceramic (HSC) composites with considerable flexibility. An experimental study on the ballistic behavior of HSC composites connected with soft body armor is presented against FSP.22 fragments. The effect of Al2O3 ceramics on the ballistic performance of HSC composite was investigated, and the fragmentation resistance process of the composite armor combining the HSC composite and soft aramid insert is clarified. Furthermore, impact resistance tests made with a drop tower which allows for a gravity drop of a mass along vertical guides onto a sample placed with an energy of 5 J were performed. The results presented in this paper show that the HSC composites can be successfully used as a hard body armor. However, they do not exhibit the properties of absorbing the impact energy generated during the drop tower tests. The test results show that the ballistic performance of composite armors is influenced by the hardness and Young modulus of ceramics and soft body armor panel. Additionally, in the article, the results of mechanical properties of silicones used for preparation of composites were presented and compiled to determine their role in the performance of impact protection.

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“…Finally, the interdisciplinary group of papers includes post-bucking analysis of elasto-plastic framed structures and curved structures by Yang et al [16], study of curved creases as a means to redistribute global bending stiffness in corrugations by Woodruff and Filipov [17], investigation of the response of cells on a bed of micro-posts idealized as a Winkler foundation using a homeostatic mechanics framework by Vigliotti et al [18], and coarsegraining for polymeric metamaterial design by Varma and Sarkar [19].…”

mentioning

confidence: 99%