Dynamic response of cylindrical sandwich shells with metallic foam cores under blast loading—Numerical simulations

Jing, Lin; Wang, Zhi Hua; Zhao, Longmao

doi:10.1016/j.compstruct.2012.12.013

Cited by 75 publications

(20 citation statements)

References 18 publications

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“…This model is suited to model isotropic and kinematic hardening plasticity with the option of including rate effects. The strain rate effects are ignored as most aluminum alloys are strain rate-insensitive [26,27]. In numerical simulation, the solid matrix (the cell-walls) material is assumed to be an AleSi(7e9%)-Mg(0.5e1%) alloy.…”

Section: Materials Modelsmentioning

confidence: 99%

A 3D mesoscopic model for the closed-cell metallic foams subjected to static and dynamic loadings

Fang,

Zhang,

Zhang

et al. 2015

International Journal of Impact Engineering

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Section: Materials Modelsmentioning

confidence: 99%

A 3D mesoscopic model for the closed-cell metallic foams subjected to static and dynamic loadings

Fang,

Zhang,

Zhang

et al. 2015

International Journal of Impact Engineering

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“…This software is particularly suitable for nonlinear dynamic problems, such as impact or explosion. It allows for the application of different algorithms such as Euler, Lagrange, arbitrary Lagrange-Euler (ALE), and SPH to solve the fluid-structure problems [26][27][28]. Eight-node brick elements with ALE were adopted for the structure.…”

Section: Model and Materialmentioning

confidence: 99%

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

Chen¹,

Li²,

Lu³

et al. 2015

Mathematical Problems in Engineering

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By analyzing the fragmentation distributions of a cylindrical structure and a specific structure, the necessity of parallel control to the fragments is presented. The shell shape of structures has an influence on the fragment spatial distribution. A new design method for the shell shape is proposed. To facilitate the establishment of the numerical model and the machining for relative experiments, the mathematical description of the theoretical calculated generatrix of the shell is simplified. The fragment spraying processes of the designed structures are simulated, and end effects are analyzed. Based on the theoretical design and plentiful simulation data, the relationships between the size of the parallel fragmentation structure and the optimized curvature radius of the shell are expressed by an equation. The equation is validated by numerical means and can be a reliable reference to the design of the parallel fragmentation structure.

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“…Automatic, surface-to-surface contact options were generally used. It should be pointed out that the analyses of the effect of element size on the structural response of sandwich shells were omitted in this study since the similar/same methods was employed in some previous studies and a good agreement was obtained comparing with that of experimental results [7,17,18]. The standard quasi-static tests were conducted for LY-12 aluminum alloy face-sheet and aluminum foam core material in the corresponding experimental investigations [19,20] to obtain the cor-responding mechanical parameters.…”

Section: Finite Element Modelmentioning

confidence: 99%

A numerical simulation of metallic cylindrical sandwich shells subjected to air blast loading

Jing

Yang

Wang

et al. 2013

Lat. Am. j. solids struct.

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A numerical simulation of metallic cylindrical sandwich shells subjected to air blast loading INTRODUCTIONCellular metals including foams and honeycombs, as a new class of ultra-light multi-functional materials, are widely used as advanced structural components in many engineering applications due to their excellent physical, thermal and mechanical properties [1][2][3]. Extensive applications of cellular metals include light weight cores for sandwich structures to increase the shock resistance, and improve the energy absorbing capacity. The sandwich structure is a special topology form comprising a combination of different materials that are bonded to each other so as to utilize the properties of each component for the structural advantage of the whole assembly. Potential advantages of sandwich beams or panels with two metallic face-sheets and a cellular metal core over solid structures of equal mass under intensive impact/blast loadings have been massively studied in the literatures [4][5][6][7][8][9][10]. Typical deformation and failure modes, such as face-sheet yield, core compression and shear, AbstractThe dynamic response of cylindrical sandwich shells with aluminum foam cores subjected to air blast loading was investigated numerically in this paper. According to KNR theory, the nonlinear compressibility of the air and finite shock conditions were taken into account in the finite element model. Numerical simulation results show that the compression strain, which plays a key role on energy absorption, increases approximately linearly with normalized impulse, and reduces with increasing relative density or the ratio of face-sheet thickness and core thickness. An increase of the impulse will delay the equalization of top and bottom face-sheet velocities of sandwich shell, but there is a maximum value in the studied bound. A limited study of weight optimization was carried out for sandwich shells with respect to the respective geometric parameters, including face-sheet thickness, core thickness and core relative density. These numerical results are of worth to theoretical prediction and engineering application of cellular metal sandwich structures.

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Dynamic response of cylindrical sandwich shells with metallic foam cores under blast loading—Numerical simulations

Cited by 75 publications

References 18 publications

A 3D mesoscopic model for the closed-cell metallic foams subjected to static and dynamic loadings

A 3D mesoscopic model for the closed-cell metallic foams subjected to static and dynamic loadings

Parallel Control to Fragments of a Cylindrical Structure Driven by Explosive inside

A numerical simulation of metallic cylindrical sandwich shells subjected to air blast loading

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