Dynamic Characterisation of Marine Sandwich Structures

Battley, Mark; Stenius, Ivan; Breder, Johan; Edinger, Susan

doi:10.1007/1-4020-3848-8_54

Cited by 12 publications

(20 citation statements)

References 4 publications

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“…Their work concluded that slamming induced much higher shear loading and deflections than predicted by static panel theory. Further research by Battley and Allen [24][25][26][27][28] extended this study to additional material systems with a focus on flexible panels, and the experimental methodology. Figure 2 shows the overall testing system which consists of a polyethylene tank measuring 3.5 m in diameter filled with water to 1.4 m deep, giving a fluid domain of 13,500 L. A servo-hydraulic system moves the specimen and support fixture vertically into the water surface during the impacts.…”

Section: Methodsmentioning

confidence: 99%

Servo-hydraulic System for Controlled Velocity Water Impact of Marine Sandwich Panels

Battley

Allen

2011

Exp Mech

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Slamming, the impact between a marine craft's hull and the water surface is a critical load case for structural design of marine vessels. The importance of hull slamming has led to a significant body of work to understand, predict and model these impacts. There is however, a lack of experimental data for validation, particularly for deformable panels and sandwich structures. This paper describes a high-velocity panel slamming test system that enables the generation of comprehensive and reliable experimental data on slamming impacts for both rigid and flexible panel structures. The pressure magnitudes, time-histories and spatial distributions resulting from testing of a nominally rigid panel have been compared with previous analytical, semi-empirical and experimental studies. Slamming impacts of a deformable sandwich panel are shown to cause different pressures to those from a rigid panel impact, resulting in increased transverse shear loading at the panel edge.

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Section: Methodsmentioning

confidence: 99%

Servo-hydraulic System for Controlled Velocity Water Impact of Marine Sandwich Panels

Battley

Allen

2011

Exp Mech

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“…β and P peak increase as impact velocity V n increases and impact angle ξ decreases (Battley et al [9]). Because V n is assumed constant after water entry, a residual pressure remains after the peak pressure decays (Battley and Stenius [10]).…”

Section: Current Studymentioning

confidence: 99%

A comparison of slamming impact models on orthotropic sandwich panels

Walsh¹,

Hou²,

Soman³

2008

WIT Transactions on the Built Environment

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Hull slamming due to wave impacts is a challenging problem in the design of high-performance, sandwich-construction marine craft. Sandwich composites have mechanical properties fundamentally different from those of steel or aluminum, and sandwich core shear is a common failure mode in planing craft hull panels. This paper compares the slamming response of an isotropic hull panel with an orthotropic composite sandwich panel. Linear, 3D finite element analysis is performed for a spatially constant pulse model and a traveling pulse model. It is shown that sandwich panel response is sensitive to pressure variation in both time and space. Therefore, dynamic analysis of a traveling pulse is essential for effective design.

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“…These new materials will translate to applications that are lighter, faster, stronger and more durable than their steel counterparts. Marine structures are often subjected to extreme loading scenarios where high strain rates occur as a result of, for example, wave slamming and underwater explosions (UNDEX) (Battley et al, 2005;Charca et al, 2009;Rosén, 2004); therefore, it is important to understand how high strain rate events influence the dynamic response of the new materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of shock wave focusing in water in a logarithmic spiral duct, Part 2: Strong coupling

et al. 2015

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a b s t r a c tUnderwater explosions near submerged marine structures can lead to severe conditions and subsequent damage, particularly if the geometry of the solid structure leads to shock focusing of the incident shock wave. In order to understand the dynamic response of submerged marine structures subjected to underwater explosions it is important to understand the fluid-structure coupling that occurs during the shock focusing event. In this paper, experiments and numerical simulations of shock focusing in thin water-filled convergent structures are conducted to study the fluid-structure interaction and the dynamic response of the surrounding structure. Three types of materials have been investigated: 1018 steel, 6061 aluminum and a 16-layer carbon-fiber-reinforced epoxy composite. Two different thicknesses of the steel and aluminum specimens have been used: 1.3 mm and 5.8 mm. The carbon fiber specimen was 5.8 mm thick, with the same weight as the 1.3 mm thick steel specimen. Results show that the type of material, its geometry, and its thickness play a substantial role in determining the fluid-structure interaction during and after the shock focusing event.

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Dynamic Characterisation of Marine Sandwich Structures

Cited by 12 publications

References 4 publications

Servo-hydraulic System for Controlled Velocity Water Impact of Marine Sandwich Panels

Servo-hydraulic System for Controlled Velocity Water Impact of Marine Sandwich Panels

A comparison of slamming impact models on orthotropic sandwich panels

Investigation of shock wave focusing in water in a logarithmic spiral duct, Part 2: Strong coupling

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