One-dimensional response of sandwich plates to underwater blast: Fluid-structure interaction experiments and simulations

Abstract

Fluid-structure interaction (FSI) experiments and finite element (FE) calculations are performed in order to examine the one-dimensional response of water-backed and air-backed sandwich plates subject to blast loading in either deep or shallow water. The sandwich plates comprise rigid face sheets and low-density foam cores. Experiments are conducted in a transparent shock tube, allowing measurements of both structural response and cavitation processes in the fluid. Measurements are found in good agreement with predictions and allow concluding that the advantages of using the sandwich construction over the monolithic are maximised for the case of water-backed sandwich plates in deep water.

The dynamic response of composite plates to underwater blast: Theoretical and numerical modelling

“…These models capture propagation of breaking fronts and closing fronts [17] as well as their interactions with the structure in a blast event; their predictions allowed concluding that both the cavitation process and the structural response are extremely sensitive to the initially applied pressure, consistent with the findings of companion studies [30,31].…”

The response of circular composite plates to underwater blast: Experiments and modelling

“…Recently, developed a transparent shock tube capable of reproducing blast loading in water and to allow simultaneous observation of structural motion and fluid cavitation. This apparatus was then employed to examine the 1D response of sandwich plates to blast in deep water (Schiffer and Tagarielli, 2013) and to investigate the response of water-filled double hulls subject to underwater blast (Schiffer and Tagarielli, 2014b). …”

“…This method is convenient because the decay time  and the peak pressure 0 p can be independently adjusted by tweaking mass and velocity of the projectile, and is widely used, see e.g. (Deshpande et al, 2006;Espinosa et al, 2006;Latourte et al, 2011;, 2013, 2014b. Table 3.…”

Analytical Models for the Response of the Double-Bottom Structure to Underwater Explosion Based on the Wave Motion Theory

“…They focused on the cavitation phenomena in the fluid, including propagation and arrest of breaking fronts and closing fronts. Later on, the structure response and the cavitation process subsequent to underwater blast were experimentally investigated [17][18][19]. It was found that the breaking front approaching the structure may invert its direction before reaching the fluid-structure interface and the behavior of water cavitation strongly influenced the pressure histories of the structure.…”

“…A significant part of the recent literature on blast loading has concentrated on the underwater blast loading of sandwich structure [17,[21][22][23][24][25]. Deshpande and Fleck [21] and Hutchinson and Xue [22] proposed approximate analytical models for the one-dimensional response of sandwich plate subjected to underwater shock load.…”