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Dynamic Response and Energy Absorption of Lattice Sandwich Composite Structures Under Underwater Explosive Load.

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Title: Dynamic Response and Energy Absorption of Lattice Sandwich Composite Structures Under Underwater Explosive Load.
Authors: Zhang, Xiaolong1 (AUTHOR), Sun, Shengjie2 (AUTHOR), Kang, Xiao1,2 (AUTHOR), Huang, Zhixin1,2 (AUTHOR), Li, Ying2 (AUTHOR)
Source: Materials (1996-1944). Mar2025, Vol. 18 Issue 6, p1317. 15p.
Subjects: Sandwich construction (Materials), Submerged structures, Underwater explosions, Shock tubes, Specific gravity
Abstract: This study investigates the underwater explosion resistance of aluminum alloy octet-truss lattice sandwich structures using shock tube experiments and LS-DYNA simulations. A systematic analysis reveals key mechanisms influencing protective performance. The sandwich configuration mitigates back plate displacement through quadrilateral inward deformation, exhibiting phased deformation responses between face plates and back plates mediated by lattice interactions. Increasing the lattice relative density from 0.1 to 0.3 reduces maximum back plate displacement by 22.2%. While increasing the target plate thickness to 1.5 mm reduces displacement by 47.6%, it also decreases energy absorption efficiency by 20% due to limited plastic deformation. Fluid–structure interaction simulations correlate well with 3D-DIC deformation measurements. The experimental results demonstrate the exceptional impact energy absorption capacity of the octet-truss lattice and highlight the importance of stiffness-matching strategies for enhanced energy dissipation. These findings provide valuable insights for optimizing the design of underwater protection structures. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: egs
DbLabel: Engineering Source
An: 184099494
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Dynamic Response and Energy Absorption of Lattice Sandwich Composite Structures Under Underwater Explosive Load.
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Mar2025, Vol. 18 Issue 6, p1317. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Sandwich+construction+%28Materials%29%22">Sandwich construction (Materials)</searchLink><br /><searchLink fieldCode="DE" term="%22Submerged+structures%22">Submerged structures</searchLink><br /><searchLink fieldCode="DE" term="%22Underwater+explosions%22">Underwater explosions</searchLink><br /><searchLink fieldCode="DE" term="%22Shock+tubes%22">Shock tubes</searchLink><br /><searchLink fieldCode="DE" term="%22Specific+gravity%22">Specific gravity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study investigates the underwater explosion resistance of aluminum alloy octet-truss lattice sandwich structures using shock tube experiments and LS-DYNA simulations. A systematic analysis reveals key mechanisms influencing protective performance. The sandwich configuration mitigates back plate displacement through quadrilateral inward deformation, exhibiting phased deformation responses between face plates and back plates mediated by lattice interactions. Increasing the lattice relative density from 0.1 to 0.3 reduces maximum back plate displacement by 22.2%. While increasing the target plate thickness to 1.5 mm reduces displacement by 47.6%, it also decreases energy absorption efficiency by 20% due to limited plastic deformation. Fluid–structure interaction simulations correlate well with 3D-DIC deformation measurements. The experimental results demonstrate the exceptional impact energy absorption capacity of the octet-truss lattice and highlight the importance of stiffness-matching strategies for enhanced energy dissipation. These findings provide valuable insights for optimizing the design of underwater protection structures. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.3390/ma18061317
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 1317
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        Type: general
      – SubjectFull: Submerged structures
        Type: general
      – SubjectFull: Underwater explosions
        Type: general
      – SubjectFull: Shock tubes
        Type: general
      – SubjectFull: Specific gravity
        Type: general
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      – TitleFull: Dynamic Response and Energy Absorption of Lattice Sandwich Composite Structures Under Underwater Explosive Load.
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            NameFull: Zhang, Xiaolong
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            NameFull: Sun, Shengjie
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            NameFull: Kang, Xiao
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            NameFull: Huang, Zhixin
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            NameFull: Li, Ying
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            – D: 15
              M: 03
              Text: Mar2025
              Type: published
              Y: 2025
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              Value: 18
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