Experimental tests and numerical modeling of ballistic impact on honeycomb sandwich structures reinforced by functionally graded plates

Arslan, Kemal; Güneş, Recep; Apalak, M. Kemal; Reddy, J. N.

doi:10.1177/0021998317695423

Cited by 26 publications

(13 citation statements)

References 32 publications

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“…According to the TTO model, 23,32,55 the composite material yields when the metal constituent yields. Thus, the yield stress σLy of the composite material (i.e.,.…”

Section: Methodsmentioning

confidence: 99%

Numerical investigation of the dynamic behavior of a Ti/TiB functionally graded material using Split Hopkinson Pressure Bar test

Zemani¹,

May²,

Gilson

et al. 2022

Journal of Composite Materials

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This work focuses on the mechanical behavior, at high strain rates, of metal-ceramic functionally graded materials (FGMs) using a Split Hopkinson Pressure Bar (SHPB) technique. The validity and the accuracy of the SHPB test results for these composite materials have not been meticulously studied due to their complex mechanical response under dynamic loadings. In this paper, numerical simulations of SHPB tests were performed to determine the dynamic response of specific FGMs at various strain rates. The effects of the compositional gradient exponent and the striker velocity, as well as increasing/decreasing stiffness through the thickness of the functionally graded specimen, were investigated. The considered material is composed of Titanium mono-boride ceramic (TiB) and Titanium metal (Ti) phases; the volume fraction (Vc) of the ceramic constituent varies through-thickness following a power-law distribution. The locally effective material properties were evaluated using a homogenization method based on the self-consistent method (SCM). The elastoplastic behavior of the FGMs under dynamic loading is described using dynamic Tamura-Tomota-Ozawa model (DTTO). The numerical simulations indicated that the compositional gradient exponent and striker velocity have significant effects on the dynamic response of the FGMs. On the other hand, the increasing/decreasing stiffness has a minor effect due to the low thickness of the experimental functionally graded specimen. Finally, the effect of the high strain rates the multiple interface reflection/transmission of the stress wave is very considerable for the design and the optimization of FGMs behavior under dynamic loading.

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“…According to the TTO model, 23,32,55 the composite material yields when the metal constituent yields. Thus, the yield stress σLy of the composite material (i.e.,.…”

Section: Methodsmentioning

confidence: 99%

Numerical investigation of the dynamic behavior of a Ti/TiB functionally graded material using Split Hopkinson Pressure Bar test

Zemani¹,

May²,

Gilson

et al. 2022

Journal of Composite Materials

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“…They concluded that when the faceplate is ceramic-rich (n=10.0), the ballistic velocity limit can reach the maximum value. A similar experimentation suggests that the projectile retains 37% kinetic energy when the faceplate is metal-rich, in contrast to the ceramic-rich faceplates when 97.4% kinetic energy is absorbed successfully [17]. More recently, Zhao et al [18] investigated the potentiality of an injection-molded composite sandwich bulletproof system and concluded that the ballistic resistance can be improved greatly in contrast to the non-injection molded system.…”

Section: State Of the Artmentioning

confidence: 98%

Ballistic impact response of reinforced honeycomb sandwich panels

Rayhan

Chowdhury

Xue

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Honeycomb sandwich panels are extensively adopted in a wide range of structures including aircraft, ships, automobiles, and infrastructure for being lightweight and occupying high out-of-plane compression and out-of-plane shear properties. They are evenly popular for their attractive energy absorption capability and resistance to ballistic impacts. Reinforcement of the hexagonal honeycomb panels is an efficient way to improve the impact resistance. However, a detailed study on the reinforcement types against ballistic impacts has not yet been reported. Therefore, the current research investigates the improvement of total energy absorption, ballistic limit velocity, and specific energy absorption (SEA) of three different reinforced hexagonal honeycombs, namely, triangular, circular, and hexagonal reinforcements against high-velocity blunt impacts. A parallel study is also carried out without any reinforcement and only thickening the cell wall of the non-reinforced hexagonal honeycomb panel. A numerical approach is adopted with commercial finite element code Ansys Explicit to analyze the virtual impact cases. The plate of the honeycomb panel is assumed as aluminum alloy Al-7075-T6, while the honeycomb core is made of Al-5083-H116. For both the alloy variants, Johnson-Cook flow stress parameters are utilized. For the projectile, a blunt cylindrical-shaped structural steel bullet is considered. It is found that, for the current investigations, triangular and circular reinforcements can significantly improve the overall ballistic performance of the sandwich panels with a penalty of weight increment. However, thickening the cell wall of the hexagonal core without any reinforcement exhibits the best ballistic performance.

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“…Honeycomb sandwich panels play a pivotal role in aerospace structures, automotive, marine, and biomedical applications due to the high strength-to-density, high energy absorption capability, high stiffness-to-density properties, and high fatigue resistance. 1–4 Among the honeycomb structures, the auxetic honeycomb with re-entrant cell shape and negative Poisson’s ratio have specific properties such as higher shear resistance, higher energy absorption, and crashworthiness with the lower natural frequency with respect to other cell shape types. 5–7 The dynamic performance of sandwich panels with re-entrant cell shape core are studied by considering the influence of negative Poisson’s ratio on natural frequencies and bending behavior.…”

Section: Introductionmentioning

confidence: 99%

A novel graded auxetic honeycomb core model for sandwich structures with increasing natural frequencies

Zamani

Heidari-Rarani

Torabi

2021

Jnl of Sandwich Structures & Materials

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A novel angle graded auxetic honeycomb (AGAH) core is designed for sandwich structures in the present study. The angle of the cells is varied through the thickness of the AGAH core using linear functions. Therefore, the thickness of the cell walls is kept constant along the gradation of the cell angle, and the length of the cell walls is changed through the core thickness as the result of angle variation. New analytical relations are proposed to predict the equivalent elastic properties of the AGAH core. The performance of the new proposed core is analytically assessed for the vibrational behavior of a sandwich plate. The governing equations are deduced adopting Hamilton’s principle under the assumption of quasi-3D exponential plate theory. Three-dimensional finite element (3D-FE) simulation is accomplished to verify the analytical results of the vibrational response of the sandwich structure. The influence of variation of the cell wall, the cell angle and cell aspect ratio of AGAH core, and geometric parameters of the sandwich structure are investigated on the vibration response of the sandwich panel. The present graded design of the auxetic honeycomb enhances the specific stiffness (i.e., stiffness to density ratio) and consequently increases the natural frequencies of sandwich structures with this type of core.

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Experimental tests and numerical modeling of ballistic impact on honeycomb sandwich structures reinforced by functionally graded plates

Cited by 26 publications

References 32 publications

Numerical investigation of the dynamic behavior of a Ti/TiB functionally graded material using Split Hopkinson Pressure Bar test

Numerical investigation of the dynamic behavior of a Ti/TiB functionally graded material using Split Hopkinson Pressure Bar test

Ballistic impact response of reinforced honeycomb sandwich panels

A novel graded auxetic honeycomb core model for sandwich structures with increasing natural frequencies

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