Blast resistance and design of sandwich cylinder with graded foam cores based on the Voronoi algorithm

Liang, Minzu; Zhang, Guodong; Lu, Fangyun; Li, Xiangyu

doi:10.1016/j.tws.2016.12.016

Cited by 33 publications

(13 citation statements)

References 27 publications

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“…The MRDs are small for the sandwich-walled rings under low explosive loading due to the low impulse for face-sheets. This phenomenon coincides with our previous investigation [ 30 ]. In addition, the EA of the core increases by 182% as the internal pressure increases 22%.…”

Section: Discussionsupporting

confidence: 94%

“…Although several investigations on the dynamic behaviors of sandwich cylinders/rings were reported in the literature, no appropriate analytical model for the deformation of sandwich cylinders/rings with graded cores subjected to internal blast loading has been proposed [ 30 ]. A more in-depth understanding of the dynamic response of sandwich cylinders/rings together with the influence of core gradient would assist designers in using graded foam materials in sandwich structures.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Analysis of Blast Protection of Graded Metal Foam-Cored Sandwich Cylinders/Rings

Liang

Lin

et al. 2020

Materials

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The blast resistance of a sandwich-walled cylinder/ring comprising two metal face-sheets and a graded metal foam core, subjected to internal air blast loading, is investigated. Analytical models are developed for the deformation of the sandwich cylinder with positive and negative gradient cores under internal blast loading. The deformation process is divided into three distinct phases, namely the fluid–structure interaction phase, core-crushing phase, and outer face-sheet deformation phase. Finite element modeling is performed using the Voronoi material model. The proposed analytical models are verified through finite element analysis, and reasonable agreement is observed between the analytical predictions and finite element results. The sandwich structures with high energy absorption capacity or low maximum radial deflection are satisfied for the protecting purpose of impact/blast resistance requirements. Typical deformation processes are classified and analyzed; the effects of explosive charge, face-sheet thickness, and core gradient on the structural response are also examined. The results indicate that both the deformation modes and the structural response of the cylinders are sensitive to the blast charge and core configuration. It is concluded that energy absorption capacity and maximum radial deflection are two conflicting goals for achieving high impact/blast resistance capability. An in-depth understanding of the behavior in sandwich-walled cylinders under blast impulse and the influence of the core configuration helps realize the advantages and disadvantages of using graded foam materials in sandwich structures and can provide a guideline for structural design.

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Section: Discussionsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Blast Protection of Graded Metal Foam-Cored Sandwich Cylinders/Rings

Liang

Lin

et al. 2020

Materials

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“…The crushing process and the deformation process of the shell as well as the theoretical analysis model of the dynamic response of the cylindrical sandwich shell are proposed. At an early stage, our team performed related studies on the dynamic behavior of cylindrical sandwich trays [5][6][7]. According to the results of explosion tests and simulations, the maximum deformation of the shell depends on the relative density, the inner diameter, the thickness and the explosion equivalent of the core.…”

Section: Introductionmentioning

confidence: 99%

Research on Blast Resistance of the Cylinder with Aluminium Foam under Internal Explosive Load

Zhang

Liang

et al. 2022

J. Phys.: Conf. Ser.

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Aluminium foam has an excellent performance in terms of impact resistance and energy absorption. The experimental and numerical investigations on the blast resistance of the cylinder with aluminium foam under internal explosive load are carried out in this thesis and the factors influencing the blast resistance are analyzed. First, experiments were carried out under internal explosive load with different relative densities and explosion loads, and the defections of inner and outer layers were obtained. Second, based on the voronoi technique, a 2D finite element model of sandwich cylinders with a core of aluminium foam was constructed, the effectiveness of the model was then confirmed by conflicting results from simulations and experiments. Finally, the finite element model was used to analyze the effects of characteristic cell size and explosive load, which were reflected in the energy absorption and deflection of the outer layer. The test results show that the simulation results agree well with the experimental results. The characteristic cell size has little influence on energy absorption. In the case of homogeneous cores, the energy absorption per unit of mass decreases linearly with increasing relative density and the deflections of outer layers increase slightly.

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“…Furthermore, Cui et al [27] designed a helmet with functionally graded foam core to obtain an optimization choice for impact resistance. Other crashworthiness systems such as metallic tubes and sandwich structures filled with graded foam core were also designed and numerically studied [28][29][30][31]. By means of 3 experiments, the quasi-static and dynamic behaviors of graded foam materials are also widely studied.…”

Section: Introductionmentioning

confidence: 99%

Impact response and energy absorption of functionally graded foam under temperature gradient environment

Liu

Ding

2019

Composites Part B: Engineering

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Blast resistance and design of sandwich cylinder with graded foam cores based on the Voronoi algorithm

Cited by 33 publications

References 27 publications

Theoretical Analysis of Blast Protection of Graded Metal Foam-Cored Sandwich Cylinders/Rings

Theoretical Analysis of Blast Protection of Graded Metal Foam-Cored Sandwich Cylinders/Rings

Research on Blast Resistance of the Cylinder with Aluminium Foam under Internal Explosive Load

Impact response and energy absorption of functionally graded foam under temperature gradient environment

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