Energy dissipation mechanism of foam sandwich plate subjected to contact underwater explosion

ZHAO Yanjie; HAO Yi; LIU Jianhu; ZHANG Pan

doi:10.19693/j.issn.1673-3185.01168

Volume 13 Issue 3

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Chinese Journal of Ship Research > 2018 > 13(3): 13-22. > DOI: 10.19693/j.issn.1673-3185.01168

ZHAO Yanjie, HAO Yi, LIU Jianhu, ZHANG Pan. Energy dissipation mechanism of foam sandwich plate subjected to contact underwater explosion[J]. Chinese Journal of Ship Research, 2018, 13(3): 13-22. DOI: 10.19693/j.issn.1673-3185.01168

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Energy dissipation mechanism of foam sandwich plate subjected to contact underwater explosion

1.
China Ship Scientific Research Center, Wuxi 214082, China
2.
Maritime Defense Technologies Innovation Center, Wuxi 214082, China
3.
School of Naval Architecture & Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

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Received Date: January 10, 2018
Available Online: May 07, 2021

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract

Objectives This paper is a study of the energy dissipation mechanism of a foam sandwich plate subjected to contact underwater explosion (contact UNDEX).
Methods First, a series of contact UNDEX tests of foam sandwich plates is carried out in order to obtain the damage modes, and anti-explosion ability comparisons between sandwich plates and mass-equal solid steel plates with different sandwich configurations are made. Then, the damage processes of foam sandwich plates under contact UNDEX are analyzed through numerical simulation, their damage modes are simulated and the amount of energy dissipated in each sandwich plate section is calculated.
Results It is concluded from the tests that sandwich plates have superior anti-explosion ability over mass-equal solid steel plates, and sandwich plates with a thin face plate and a thick back plate is the configuration that provides optimal performance. The energy dissipation rate of a sandwich plate is 5%-8% higher than that of a solid plate.
Conclusions The energy dissipation mechanism of foam sandwich plates subjected to contact UNDEX is discussed on the basis of the test and simulation results. All the results can provide useful references for the anti-explosion protection design of naval ships.
- contact underwater explosion,
- sandwich plate,
- damage mode,
- energy dissipation

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