Transient response of a submerged cylindrical foam core sandwich panel subjected to shock loading

Panahi, Babak; Ghavanloo, Esmaeal; Daneshmand, Farhang

doi:10.1016/j.matdes.2011.01.034

Cited by 38 publications

(13 citation statements)

References 17 publications

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“…Additionally, Figure 9 illustrates that the shock wave propagates symmetrically from the stand-off point to the aft and fore, while it expands in the perpendicular direction. The aforementioned results are in accordance with the results reported in [2,43,59]. Also, Figure 9 presents the volume changes in gas bubbles.…”

Section: Propagation Of Shock Wavesupporting

confidence: 91%

Numerical Analysis and Dynamic Response of Optimized Composite Cross Elliptical Pressure Hull Subject to Non-Contact Underwater Blast Loading

et al. 2019

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Among the most important problems confronted by designers of submarines is to minimize the weight, increase the payload, and enhance the strength of pressure hull in order to sustain the hydrostatic pressure and underwater explosions (UNDEX). In this study, a Multiple Intersecting Cross Elliptical Pressure Hull (MICEPH) subjected to hydrostatic pressure was first optimized to increase the payload according to the design requirements. Thereafter, according to the optimum design results, a numerical analysis for the fluid structure interaction (FSI) phenomena and UNDEX were implemented using nonlinear finite element code ABAQUS/Explicit. The propagation of shock waves through the MICEPH was analyzed and the response modes (breathing, accordion and whipping) were discussed. Furthermore, the acceleration, displacement and failure index time histories at different locations were presented. The results showed that the greatest acceleration occurred in the athwart direction, followed by the vertical and longitudinal directions. Additionally, the first bubble pulse has a major effect on athwart acceleration. Moreover, the analysis can be effectively used to predict and calculate the failure indices of pressure hull. Additionally, it provides an efficient method that reasonably captures the dynamic response of a pressure hull subjected to UNDEX.

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Section: Propagation Of Shock Wavesupporting

confidence: 91%

Numerical Analysis and Dynamic Response of Optimized Composite Cross Elliptical Pressure Hull Subject to Non-Contact Underwater Blast Loading

et al. 2019

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“…The straight lines correspond to the material failures while the curved lines correspond to the buckling failure. The material properties and the strength parameters of T700/epoxy, B(4)5505/Epoxy composites and PVC foam are demonstrated in Table 1 [57,58]. Figure 2a illustrates the relationship between the collapse depth and buoyancy factor (B.F).…”

Section: Methodsmentioning

confidence: 99%

Numerical Analysis of Sandwich Composite Deep Submarine Pressure Hull Considering Failure Criteria

Helal

Huang

Wang

et al. 2019

JMSE

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The pressure hull is the primary element of submarine, which withstands diving pressure and provides essential capacity for electronic systems and buoyancy. This study presents a numerical analysis and design optimization of sandwich composite deep submarine pressure hull using finite element modeling technique. This study aims to minimize buoyancy factor and maximize deck area and buckling strength factors. The collapse depth is taken as a base in the pressure hull design. The pressure hull has been analyzed using two composite materials, T700/Epoxy and B(4)5505/Epoxy, to form the upper and lower faces of the sandwich composite deep submarine pressure hull. The laminated control surface is optimized for the first ply failure index (FI) considering both Tsai–Wu and maximum stress failure criteria. The results obtained emphasize an important fact that the presence of core layer in sandwich composite pressure hull is not always more efficient. The use of sandwich in the design of composite deep submarine pressure hull at extreme depths is not a safe option. Additionally, the core thickness plays a minor role in the design of composite deep submarine pressure hull. The outcome of an optimization at extreme depths illustrates that the upper and lower faces become thicker and the core thickness becomes thinner. However, at shallow-to-moderate depths, it is recommended to use sandwich composite with a thick core to resist the shell buckling of composite submarine pressure hull.

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“…The sandwich plate consists of a foam core surrounded by fiber-reinforced laminates. T700/3234 epoxy unidirectional composite is chosen to model the laminates and Divinycell H grade polyvinyl chloride (PVC) closed-cell foams [24] are used to model the core material sandwich plate. The material properties of T700/3234 epoxy and foam core material are given in Table 3 [24] and the strength parameters for T700/ epoxy composites are shown in Table 4 [25].…”

Section: Materials Propertiesmentioning

confidence: 99%

Numerical Evaluation of Composite Plates Performance under the Effect of Underwater Explosion

Elsayed

Nagy²,

Tong

2013

International Conference on Aerospace Sciences and Aviation Tec

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This paper examines the performance of composite plates with PVC foam cores and T700/epoxy composites face sheets, and steel plate have the same areal mass when subjected to Underwater Explosion (UNDEX). The objective of this study is to evaluate the dynamic response of those plates. A non-linear dynamic numerical analysis of the underwater explosion phenomena is performed using the ABAQUS/Explicit finite element code, which provides an important analysis tool that can help engineers and designers to design and construct better structures to resist shock loads. The temporal evolutions of plate deflection and central deflection histories were obtained. Further investigations have been performed to study the behavior of failure. The results indicate that the behavior of composite plate with PVC foam core to resist shock loads resulting from an UNDEX is better than steel plate, and the core thickness has a great effect on the plate`s response. The obtained numerical results can help to suggest design guidelines of floating structures to enhance resistance to underwater shock damage, since explosive tests are costly and dangerous.

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Transient response of a submerged cylindrical foam core sandwich panel subjected to shock loading

Cited by 38 publications

References 17 publications

Numerical Analysis and Dynamic Response of Optimized Composite Cross Elliptical Pressure Hull Subject to Non-Contact Underwater Blast Loading

Numerical Analysis and Dynamic Response of Optimized Composite Cross Elliptical Pressure Hull Subject to Non-Contact Underwater Blast Loading

Numerical Analysis of Sandwich Composite Deep Submarine Pressure Hull Considering Failure Criteria

Numerical Evaluation of Composite Plates Performance under the Effect of Underwater Explosion

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