Dynamic Response of Stiffened Plates under Air Blast

Goel, Manmohan Dass; Matsagar, Vasant; Gupta, Anil

doi:10.1260/2041-4196.2.1.139

Cited by 44 publications

(15 citation statements)

References 22 publications

(32 reference statements)

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“…finite element mesh with global seed of 0.05) are only presented. Comparison of the results obtained from the FE simulation with the experimental results for such problems has already been reported by Goel et al (2011 and2013a). …”

Section: Blast Loadingmentioning

confidence: 76%

“…These configurations are arranged as per their increasing weights. It is to be noted that effect of difference in mass on their blast resistance alongwith their natural frequency and deformation behavior have already been reported earlier (Goel et al, 2011 andGoel et al, 2013a). The face-sheet and stiffened back-sheet are made of steel considering elasticplastic and strain hardening behavior with Young's modulus, E = 210 GPa, Poisson's ratio,  = 0.3, and density,  = 7,800 kg/m 3 (Goel et al, 2011).…”

Section: Stiffened Sandwich Foam Panel Geometry and Materials Propertiesmentioning

confidence: 93%

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Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

Goel

Matsagar

Gupta

2014

Lat. Am. j. solids struct.

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In the present investigation, response of the stiffened sandwich foam panels with closed-cell aluminum foam cores subjected to blast load is examined. The panels have the metal foam sandwiched between two steel sheets. To improve resistance of the sandwich foam panel against blast, stiffeners are provided and their dynamic response under varying blast load is studied. Blast load is applied using blast equations available in LS-DYNA which takes into account reflection of blast from surface of the sandwich foam panel. Finite element based numerical simulations for dynamic analysis are performed employing a combination of shell and solid elements for steel sheets and metal foam, respectively. Quantitative assessment of dynamic response of the sandwich foam panels is made, primarily focusing on peak central point displacement of back-sheet (opposite to explosion) of the panel. Several analyses are carried out with an objective to understand the effects of stiffener configuration, foam thickness, foam density, and standoff distance on the blast response. Results indicate that the provision of stiffeners along with metal foam considerably increases blast resistance as compared to the unstiffened panels with the metal foam.

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Section: Blast Loadingmentioning

confidence: 76%

Section: Stiffened Sandwich Foam Panel Geometry and Materials Propertiesmentioning

confidence: 93%

Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

Goel

Matsagar

Gupta

2014

Lat. Am. j. solids struct.

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“…The predicted failure modes consider the interaction effects of tensile and bending strain on tearing and shear failure, which has been compared with the experimental data [8]. Goel, et al [9] conducted numerical investigations to examine the effect of ten stiffener configurations on the dynamic response of rectangular flat plate to blast loadings. It is reported that the stiffener layout and strain rate consideration governed the response of the plates to blast loadings.…”

Section: I In Nt Tr Ro Od Du Uc Ct Ti Io On Nmentioning

confidence: 99%

Numerical Simulations of Stiffened Multi-Arch Double-Layered Panels Subjected to Blast Loading

Chen

Hao

2013

International Journal of Protective Structures

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Blast-resistant structures are traditionally designed and fabricated with solid materials of heavy weight to resist blast loadings. This not only increases the material and construction costs, but also undermines the operational performance of protective structures. To overcome these problems, new designs with either new structural forms or new materials are demanded against blast loads. A multi-arch double-layered panel has been proposed as a new structural form in a previous study [1]. Its performance has been numerically demonstrated better than other forms of double-layered panels in resisting blast loads. In this study, to further improve the effectiveness of the multi-arch double-layered panel in resisting blast loads, responses of a five-arch double-layered panel with rectangular stiffeners to detonations are investigated by using finite element code Ls-Dyna. The numerical results show that the stiffened panel outperforms the unstiffened panel of the same weight in terms of the blast-resistant capacity and energy absorption capacity. Parametric studies are conducted to investigate the effects of various stiffener configurations, boundary conditions, stiffener dimension, strain rate sensitivity and blast intensity on the dynamic response to blast loadings. The central point displacements, internal energy absorptions, boundary reaction forces and plastic strains are compared and the optimal configurations of blast-resistant panel are determined. It demonstrates that the strategic arrangement of stiffeners with appropriate boundary conditions can maximize the reduction of dynamic response of the panels to blast loadings. The stiffened multi-arch dotuble-layered panels have great application potentials in the blast-resistant panel design.

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“…Importantly, the performance of the building envelope, essentially glazing and glass facades, under air blast has been researched [7,8]. In direct relation to this paper, the dynamic behavior of metallic plate-like structures subjected to blast loading has been extensively investigated through analytical, numerical, and experimental studies [9][10][11][12][13][14][15][16][17][18]. At present, blast-resistant design is standardized in several publications including ASCE 59-11 Blast Protection of Buildings [1] and UFC 3-340-02 Structures to Resist the Effects of Accidental Explosions [19].…”

Section: Introductionmentioning

confidence: 99%

Analysis Method for Reinforcing Circular Openings in Isotropic Homogeneous Plate-Like Structures Subjected to Blast Loading

Mendes

Cao

2018

Advances in Civil Engineering

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An analysis method is formulated to predict the peak bending stress concentrations around a small circular opening in an idealized isotropic homogeneous, linear elastic-perfectly plastic plate-like structure subjected to uniform blast loading. The method allows for the determination of corresponding concentrated bending moments adjacent to the opening for the design of reinforcement that can prevent the formation of localized plasticity around the opening during a blast event. The rapid formation and growth of localized plasticity around the opening can lead to a drastic reduction of the plate-like structure’s local and global stability, which could result in catastrophic failure of the structure and destruction of the entity it is protecting. A set of elemental formulas is derived considering one-way and two-way rectangular plate-like structures containing a single small circular opening located where flexure predominates. The derived formulas are applicable for elastic global response to blast loading. Abaqus was employed to conduct numerical verification of the derived formulas considering various design parameters including material properties, plate dimensions, position of opening, and explosive charge size. The formulas demonstrate a good correlation with FEA albeit with a conservative inclination. The derived formulas are intended to be used in tandem with dynamic SDOF analysis of a blast load-structure system for ease of design. Overall, the proposed method has the potential to be applicable for many typical conditions that may be encountered during design.

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Dynamic Response of Stiffened Plates under Air Blast

Cited by 44 publications

References 22 publications

Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

Blast resistance of stiffened sandwich panels with closed-cell aluminum foam

Numerical Simulations of Stiffened Multi-Arch Double-Layered Panels Subjected to Blast Loading

Analysis Method for Reinforcing Circular Openings in Isotropic Homogeneous Plate-Like Structures Subjected to Blast Loading

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