Structural response and failure modes of armor steel plates under dynamic underwater explosions

Abstract

In this research, we examine the dynamic deformation and blast-tolerance of all-metal plates and sandwich panels under underwater explosive (UNDEX) loading. The blast performance of four alloys, Mild Steel (MS), SS304, AL6XN, and AISI 4340, was based on the Johnson–Cook (JC) plasticity model as the shock factors increased from 0.42 to 0.73. The Fluid-Structure Interaction (FSI) model and nonlinear finite-element simulations were employed in the present computational analysis to yield measurable results for the deformation and equivalent plastic strain (PEEQ) of the target plates and the plastic dissipation energy of the sandwich panels. AISI 4340 consistently showed the most stability after each blast series, indicating that the material undergoes the least deformation and exhibits the lowest PEEQ due to its extremely high yield strength and resistance to plastic deformation. AL6XN exhibited appreciable performance under moderate shock and stress levels due to its pronounced strain-hardening behaviour; however, higher load levels reduced performance due to thermal softening. The SS304 exhibited reasonable deformation in addition to exhibiting a generous energy absorption capacity. Mild Steel deformed the most and had the highest PEEQ, while also having the most plastic energy dissipation. The sandwich panels subjected to underwater shock conditions demonstrate that at lower blast intensities, most of the blast energy is absorbed by the front face sheet. However, at higher blast intensities, the core’s contribution to energy absorption increases, thereby aiding energy distribution and enhancing overall stability. The blast-mitigation properties of AISI 4340 were outstanding, whereas SS304 and AL6XN improved the suitability of moderate designs for blast-tolerant applications. These analyses will help select the steels that optimize performance in marine, defense, and subsea applications for blast-resistant protective structures.

Keywords

dynamic energy absorption fluid-structure interaction sandwich panel sustainable structures underwater blast mitigation

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References

Bendarma

Jankowiak

Rusinek

, et al. (2023) Experimental and numerical analysis of aluminum-polyethylene composite structure subjected to tension and perforation under dynamic loading for a wide range of temperatures. Journal of Dynamic Behavior of Materials 10(1): 51–74. https://doi.org/10.1007/s40870-023-00400-y

Boonkong

Shen

Guan

, et al. (2016) The low velocity impact response of curvilinear-core sandwich structures. International Journal of Impact Engineering 93: 28–38. https://doi.org/10.1016/j.ijimpeng.2016.01.012

Dassault Systèmes Simulia Corp. (2022) Abaqus/Standard User’s Manual. Version 2022.

Gupta

Kumar

Hegde

(2010) On deformation and tearing of stiffened and un-stiffened square plates subjected to underwater Explosion—a numerical study. International Journal of Mechanical Sciences 52(5): 733–744. https://doi.org/10.1016/j.ijmecsci.2010.01.005

Imbalzano

Linforth

Ngo

, et al. (2017) Blast resistance of auxetic and honeycomb sandwich panels: comparisons and parametric designs. Composite Structures 183: 242–261. https://doi.org/10.1016/j.compstruct.2017.03.018

Karagiozova

Nurick

Langdon

(2009) Behaviour of sandwich panels subject to intense air blasts – part 2: numerical simulation. Composite Structures 91(4): 442–450. https://doi.org/10.1016/j.compstruct.2009.04.010

Köhnen

Haase

Bültmann

, et al. (2018) Mechanical properties and deformation behavior of additively manufactured lattice structures of stainless steel. Materials & Design 145: 205–217. https://doi.org/10.1016/j.matdes.2018.02.062

Kumar

Narayanan

Chandran

, et al. (2023) Lightweight and Sustainable self-reinforced Composites. Elsevier eBooks, 19–46. https://doi.org/10.1016/b978-0-323-95189-0.00002-0

Lazar

PJL

Rajeev

(2024) Deformation behavior of super-austenitic stainless steel sandwich panels subjected to air blast and underwater explosion. Procedia Structural Integrity 60: 185–194. https://doi.org/10.1016/j.prostr.2024.05.040

10.

Miller

Smith

Evans

(2010) Honeycomb cores with enhanced buckling strength. Composite Structures 93(3): 1072–1077. https://doi.org/10.1016/j.compstruct.2010.09.021

11.

Pardo

Merino

Coy

, et al. (2007) Influence of Ti, C and N concentration on the intergranular corrosion behaviour of AISI 316Ti and 321 stainless steels. Acta Materialia 55(7): 2239–2251. https://doi.org/10.1016/j.actamat.2006.11.021

12.

Rajeev

Lazar

PJL

(2025) Structural integrity of mild steel sandwich panels subjected to Air-Backed underwater shock loads. In: Tan, K.H., Banthia, N., Kodur, V., Ma, YX., Soleimani-Dashtaki, S. (eds) Safeguarding Structural Resilience Under Extreme Events. PROTECT 2024. Lecture Notes in Civil Engineering. Springer, Cham, vol 649. 209–223. Available at: https://doi.org/10.1007/978-3-031-92719-5_18

13.

Rajeev

Parsi

Lazar

PJL

(2024) Dynamic response analysis of reinforced column subjected to shock wave loading. Procedia Structural Integrity 60: 222–232. https://doi.org/10.1016/j.prostr.2024.05.044

14.

Ramajeyathilagam

Vendhan

(2004) Deformation and rupture of thin rectangular plates subjected to underwater shock. International Journal of Impact Engineering 30(6): 699–719. https://doi.org/10.1016/j.ijimpeng.2003.01.001

15.

Rizwanullah Sharma

(2020) Influence of critical parameters on UHPFRC structural elements subjected to blast loading. SN Applied Sciences 2(3): 486. https://doi.org/10.1007/s42452-020-2259-5

16.

Sun

Huo

Chen

, et al. (2017) Experimental and numerical study on honeycomb sandwich panels under bending and in-panel compression. Materials & Design 133: 154–168. https://doi.org/10.1016/j.matdes.2017.07.057

17.

Talaat

Yehia

Mazek

, et al. (2022) Finite element analysis of RC buildings subjected to blast loading. Ain Shams Engineering Journal 13(4): 101689. https://doi.org/10.1016/j.asej.2021.101689

18.

Thai

Kim

(2018) Numerical investigation of the damage of RC members subjected to blast loading. Engineering Failure Analysis 92: 350–367. https://doi.org/10.1016/j.engfailanal.2018.06.001

19.

Vijay Kumar

Rajendran

Ramakrishna

(2023) Experimental analysis of ballistic impact on carbon, glass and hybrid composite under hydrostatic prestrain. Advances in the Analysis and Design of Marine Structures 717–721. Available at: https://doi.org/10.1201/9781003399759-79

20.

Pham

Hao

, et al. (2021) Blast resistant enhancement of meta-panels using multiple types of resonators. International Journal of Mechanical Sciences 215: 106965. https://doi.org/10.1016/j.ijmecsci.2021.106965

21.

Wadley

Dharmasena

Queheillalt

, et al. (2007) Dynamic compression of square honeycomb structures during underwater impulsive loading. Journal of Mechanics of Materials and Structures 2(10): 2025–2048. https://doi.org/10.2140/jomms.2007.2.2025

22.

Yadav

Singhal

Jasra

, et al. (2020) Determination of johnson-cook material model for weldment of mild steel. Materials Today Proceedings 28: 1801–1808. https://doi.org/10.1016/j.matpr.2020.05.213

23.

Zhu

Zhao

, et al. (2007) Deformation and failure of blast-loaded metallic sandwich panels—Experimental investigations. International Journal of Impact Engineering 35(8): 937–951. https://doi.org/10.1016/j.ijimpeng.2007.11.003