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A New Blast Absorbing Sandwich Panel with Unconnected Corrugated Layers—Numerical Study.

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Title: A New Blast Absorbing Sandwich Panel with Unconnected Corrugated Layers—Numerical Study.
Authors: Al-Rifaie, Hasan1 (AUTHOR) hasan.al-rifaie@put.poznan.pl, Studziński, Robert1 (AUTHOR), Gajewski, Tomasz1 (AUTHOR), Malendowski, Michał1 (AUTHOR), Sumelka, Wojciech1 (AUTHOR), Sielicki, Piotr W.1 (AUTHOR)
Source: Energies (19961073). Jan2021, Vol. 14 Issue 1, p214-214. 1p.
Subject Terms: *Sandwich construction (Materials), *Progressive collapse, *Blast waves, *Energy dissipation, *Wave energy, *Riveted joints
Abstract: The need for more effective defence systems is of critical importance because of the rising risk of explosive attacks. Sandwich panels are used as plastically deforming sacrificial structures, absorbing blast wave energy. To the authors' knowledge, the blast behaviour of sandwich panels with connected (welded/bolted/riveted) corrugated layers has been well covered in literature. Hence, the aim of this numerical study was to develop new, easy-to-build, non-expensive, graded sandwich panel with 'unconnected' corrugated layers that can be used as a multipurpose sacrificial protective structure against wide range of blast threats. The proposed sandwich panel is composed of six unconnected aluminium (AL6063-T4) core layers encased in a steel (Weldox 460 E) frame with 330 × 330 × 150 mm overall dimensions. The numerical analysis was conducted using Abaqus/Explicit solver. First, the performance of four different nongraded layer topologies (trapezoidal, triangular, sinusoidal, and rectangular) was compared, when subjected to ~16 MPa peak reflected over-pressure (M = 0.5 kg of TNT at R = 0.5 m). Results showed that the trapezoidal topology outperformed other topologies, with uniform progressive collapse, lower reaction force, and higher plastic dissipation energy. Then, the trapezoidal topology was further analysed to design a 'graded' sandwich panel that can absorb a wide range of blast intensities (~4, 7, 11, 13, and 16 MPa peak reflected over-pressures) by using a (0.4, 0.8, 1.2 mm) stepwise thickness combination for the layers. In conclusion, the superior performance of the proposed sandwich panel with unconnected graded layers can be considered as a novel alternative to the conventional costly laser-welded sandwich panels. Applications of the new solution range from protecting civil structures to military facilities. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 148047108
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  Label: Title
  Group: Ti
  Data: A New Blast Absorbing Sandwich Panel with Unconnected Corrugated Layers—Numerical Study.
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  Data: <searchLink fieldCode="AR" term="%22Al-Rifaie%2C+Hasan%22">Al-Rifaie, Hasan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hasan.al-rifaie@put.poznan.pl</i><br /><searchLink fieldCode="AR" term="%22Studziński%2C+Robert%22">Studziński, Robert</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gajewski%2C+Tomasz%22">Gajewski, Tomasz</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Malendowski%2C+Michał%22">Malendowski, Michał</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sumelka%2C+Wojciech%22">Sumelka, Wojciech</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sielicki%2C+Piotr+W%2E%22">Sielicki, Piotr W.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jan2021, Vol. 14 Issue 1, p214-214. 1p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Sandwich+construction+%28Materials%29%22">Sandwich construction (Materials)</searchLink><br />*<searchLink fieldCode="DE" term="%22Progressive+collapse%22">Progressive collapse</searchLink><br />*<searchLink fieldCode="DE" term="%22Blast+waves%22">Blast waves</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink><br />*<searchLink fieldCode="DE" term="%22Wave+energy%22">Wave energy</searchLink><br />*<searchLink fieldCode="DE" term="%22Riveted+joints%22">Riveted joints</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The need for more effective defence systems is of critical importance because of the rising risk of explosive attacks. Sandwich panels are used as plastically deforming sacrificial structures, absorbing blast wave energy. To the authors' knowledge, the blast behaviour of sandwich panels with connected (welded/bolted/riveted) corrugated layers has been well covered in literature. Hence, the aim of this numerical study was to develop new, easy-to-build, non-expensive, graded sandwich panel with 'unconnected' corrugated layers that can be used as a multipurpose sacrificial protective structure against wide range of blast threats. The proposed sandwich panel is composed of six unconnected aluminium (AL6063-T4) core layers encased in a steel (Weldox 460 E) frame with 330 × 330 × 150 mm overall dimensions. The numerical analysis was conducted using Abaqus/Explicit solver. First, the performance of four different nongraded layer topologies (trapezoidal, triangular, sinusoidal, and rectangular) was compared, when subjected to ~16 MPa peak reflected over-pressure (M = 0.5 kg of TNT at R = 0.5 m). Results showed that the trapezoidal topology outperformed other topologies, with uniform progressive collapse, lower reaction force, and higher plastic dissipation energy. Then, the trapezoidal topology was further analysed to design a 'graded' sandwich panel that can absorb a wide range of blast intensities (~4, 7, 11, 13, and 16 MPa peak reflected over-pressures) by using a (0.4, 0.8, 1.2 mm) stepwise thickness combination for the layers. In conclusion, the superior performance of the proposed sandwich panel with unconnected graded layers can be considered as a novel alternative to the conventional costly laser-welded sandwich panels. Applications of the new solution range from protecting civil structures to military facilities. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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        Value: 10.3390/en14010214
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: 214
    Subjects:
      – SubjectFull: Sandwich construction (Materials)
        Type: general
      – SubjectFull: Progressive collapse
        Type: general
      – SubjectFull: Blast waves
        Type: general
      – SubjectFull: Energy dissipation
        Type: general
      – SubjectFull: Wave energy
        Type: general
      – SubjectFull: Riveted joints
        Type: general
    Titles:
      – TitleFull: A New Blast Absorbing Sandwich Panel with Unconnected Corrugated Layers—Numerical Study.
        Type: main
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            NameFull: Al-Rifaie, Hasan
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            NameFull: Studziński, Robert
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            NameFull: Sumelka, Wojciech
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            – D: 01
              M: 01
              Text: Jan2021
              Type: published
              Y: 2021
          Identifiers:
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              Value: 14
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            – TitleFull: Energies (19961073)
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