Numerical Study on the Projectile Impact Resistance of Multi-Layer Sandwich Panels with Cellular Cores

Chen, Liming; Du, Bing; Zhang, Jian; Zhou, Hao; Li, Dian‐sen; Fang, Daining

doi:10.1590/1679-78252905

Cited by 14 publications

(5 citation statements)

References 37 publications

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“…[14][15][16][17][18] Numerous literature and works have proved the potential of NPR honeycomb structures in impact energy absorption through mechanical models [19][20][21][22] and experiments. [23][24][25][26] Grujicic et al 24 studied the dynamic impact response of sandwich structures filled with NPR. The results show that the main energy-absorbing deformation patterns of NPR cells are elastic deformation, plastic deformation and folding deformation of the cell wall.…”

Section: Introductionmentioning

confidence: 99%

“…The results show that the main energy-absorbing deformation patterns of NPR cells are elastic deformation, plastic deformation and folding deformation of the cell wall. The effects of core configuration and layer number on the projectile impact resistance of sandwich panels with cellular cores were studied by Chen et al 25 . Zhang et al 27 systematically investigated the dynamic crushing behaviour and energy absorption characteristics of re-entrant honeycomb, discussed the influence of cellular shape ratio and cell-wall angle on energy absorption characteristics and dynamic plateau stresses and pointed out that the dynamic plateau stress has power law with cellular shape ratio, re-entrant angle and cell-wall angle by least-square curves.…”

Section: Introductionmentioning

confidence: 99%

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The equivalent method of double V-wing honeycombs on the in-plane dynamic impact

Dian

Zhang

2021

Journal of Reinforced Plastics and Composites

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The double V-wing honeycomb can be applied in many fields because of its lower mass and higher performance. In this study, the volume, in-plane elastic modulus and unit cell area of the double V-wing honeycomb were analytically derived, which became parts of the theoretical basis of the novel equivalent method. Based on mass, plateau load, in-plane elastic modulus, compression strain and energy absorption of the double V-wing honeycomb, a novel equivalent method mapping relationship between the thickness–width ratio and the basic parameters was established. The various size factor of the equivalent honeycomb model was denoted as n and constructed by the explicit finite element analysis method. The mechanical properties and energy absorption performance for equivalent honeycombs were investigated and compared with hexagonal honeycombs under dynamic impact. Numerical results showed a well coincidence for each honeycomb under dynamic impact before 0.009 s. Honeycombs with the same thickness–width ratio had similar mechanical properties and energy absorption characteristics. The equivalent method was verified by theoretical analysis, finite element analysis and experimental testing. Equivalent honeycombs exceeded the initial honeycomb in performance efficiency. Improvement of performance and weight loss reached 173.9% and 13.3% to the initial honeycomb. The double V-wing honeycomb possessed stronger impact resistance and better load-bearing capacity than the hexagonal honeycomb under impact in this study. The equivalent method could be applied to select the optimum honeycomb based on requirements and improve the efficiency of the double V-wing honeycomb.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The equivalent method of double V-wing honeycombs on the in-plane dynamic impact

Dian

Zhang

2021

Journal of Reinforced Plastics and Composites

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“…As one of the classical species of cellular solids, honeycombs have been studied extensively in the past decades [1]. Lots of researches [1–4] have shown that cell topology and relative density have considerable influences on the dynamic performance of sandwich panels, as honeycombs crush at early deformation stage and can absorb a large fraction of the kinetic energy imparted to the panel. So there is a driving need to better understand the impact resistance and energy absorption capacities of honeycombs subject to a given shock loading.…”

Section: Introductionmentioning

confidence: 99%

In-plane dynamic crushing behaviors of joint-based hierarchical honeycombs with different topologies

Zhang

Shen

et al. 2021

Jnl of Sandwich Structures & Materials

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Introducing the hierarchy into cellular materials has attracted increasing attention in the effort to pursue improved absorbed-energy abilities and impact resistance. In this paper, the dynamic crushing properties and energy absorption capacities of joint-based hierarchical honeycombs with different topologies were explored by means of explicit dynamic finite element (FE) analysis using ANSYS/LS-DYNA. Four types of joint-based hierarchical honeycombs with uniform cell-wall thickness were firstly constructed by substituting each vertex of regular honeycombs with a smaller self-similar cell (hexagon or square). The respective influences of hierarchical parameters and impact velocities on in-plane dynamic deformation modes, mechanical characteristic and energy absorption of joint-based hierarchical honeycombs were discussed. Research results showed that the hierarchy had a far greater influence on the in-plane deformation modes of honeycombs. Compared with regular honeycombs, the dynamic plateau stress and specific energy absorption of joint-based hierarchical honeycombs can be improved if the proper hierarchical parameters were chosen. Adding the joint-based hierarchy into regular honeycombs can enhance the crushing stress efficiency (CSE) of the specimens. In addition, by introducing a non-dimensional dynamic sensitivity index, the dynamic shock enhancement of hierarchical honeycombs was also investigated. These researches are useful for the multi-objective dynamic optimization design and controllable properties of cellular materials.

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“…In order to find recent reviews readers are invited to consult, for example, the work of Abrate and Di Sciuva (2017) for general Equivalent-Single-Layer theories (ESL), Caliri et al (2016) for FEM shell theories, Garg et al(2021) to access theories including functionally graded materials, Nsengiyumva et al (2021) for a review associated with non-destructive experimental analysis and the work of Sayyad and Ghugal (2017) for vibrations and stability of laminated beams and plates. Some current works of great interest and related to the present study can be also cited, for example, the work of Icardi and Urraci (2019) regarding sandwich panels vibration, Chen et al (2016) related to impact analysis, Marques et al (2018) for structural health monitoring and Naik and Sayyad (2018) and Shekari et al (2017) for general plate theories.…”

Section: Introductionmentioning

confidence: 99%

An alternative finite strain elastoplastic model applied to soft core sandwich panels simulation

Coda

2021

Lat. Am. j. solids struct.

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An alternative elastoplastic model based on the Flory's right Cauchy-Green stretch tensor decomposition is proposed and applied to model soft cores of sandwich panels. It does not follow usual methodologies as the additive decomposition or the Kröner-Lee multiplicative decomposition of strains. It is based on an important hyperelastic relation, Flory's decomposition, from which the total strain is separated in two isochoric and one volumetric parts. Using this decomposition, the volumetric strain energy continues to be elastic during all elastoplastic analysis and the isochoric parts are managed to produce the plastic evolution. As a consequence of Flory's decomposition, the plastic flow direction is known and independent of the yielding surfaces. Moreover, it provides the well known deviatoric nature of plastic strains. For validation purposes, the resulting formulation is implemented using a special 3D prismatic element in a geometrical nonlinear positional FEM computational code. The achieved numerical results are compared with literature experimental data of soft core laminated structural elements.

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Numerical Study on the Projectile Impact Resistance of Multi-Layer Sandwich Panels with Cellular Cores

Cited by 14 publications

References 37 publications

The equivalent method of double V-wing honeycombs on the in-plane dynamic impact

The equivalent method of double V-wing honeycombs on the in-plane dynamic impact

In-plane dynamic crushing behaviors of joint-based hierarchical honeycombs with different topologies

An alternative finite strain elastoplastic model applied to soft core sandwich panels simulation

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