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Analysis and interpretation of a test for characterizing the response of sandwich panels to water blast

Authors
Journal
International Journal of Impact Engineering
0734-743X
Publisher
Elsevier
Publication Date
Volume
34
Issue
10
Identifiers
DOI: 10.1016/j.ijimpeng.2006.09.091
Keywords
  • Sandwich Panels
  • Multilayered Pyramidal Lattice
  • Underwater Blast
  • Fluid/Structure Interaction

Abstract

Abstract Metallic sandwich panels are more effective at resisting underwater blast than monolithic plates at equivalent mass/area. The present assessment of this benefit is based on a recent experimental study of the water blast loading of a sandwich panel with a multilayered core, using a Dyno-crusher test. The tests affirm that the transmitted pressure and impulse are significantly reduced when a solid cylinder is replaced by the sandwich panel. In order to fully understand the observations and measurements, a dynamic finite element analysis of the experiment has been conducted. The simulations reveal that the apparatus has strong influence on the measurements. Analytic representations of the test have been developed, based on a modified-Taylor fluid/structure interaction model. Good agreement with the finite element results and the measurements indicates that the analytic model has acceptable fidelity, enabling it to be used to understand trends in the response of multilayer cores to water blast.

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