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Frequency analysis of a sandwich conical shell with nanocomposite face layers and a honeycomb core with oriented cells.

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Title: Frequency analysis of a sandwich conical shell with nanocomposite face layers and a honeycomb core with oriented cells.
Authors: Amirabadi, Hossein1 (AUTHOR), Darakhsh, Arashk2 (AUTHOR), Sarafraz, Mirsalman3 (AUTHOR), Afshari, Hassan4 (AUTHOR) hassan.afshari@iaukhsh.ac.ir
Source: Noise & Vibration Worldwide. Jan2025, Vol. 56 Issue 1/2, p98-119. 22p.
Subjects: Hamilton's principle function, Conical shells, Free vibration, Carbon nanotubes, Honeycomb structures, Polymeric nanocomposites
Abstract: In this research, the free vibration analysis is investigated for a sandwich conical shell with two nanocomposite face layers and either a hexagonal honeycomb (HH) or a re-entrant honeycomb (RH) core oriented in an arbitrary direction. Both HH and RH cores are orthotropic structures, but the RH is an auxetic structure and the HH is a non-auxetic one. The nanocomposite face layers are fabricated of a polymeric matrix strengthened with uniformly distributed agglomerated either carbon nanotubes (CNTs) or graphene nanoplatelets (GNPs). The sandwich shell is modeled via Murakami's zig-zag theory, and the governing equations and boundary conditions are derived through Hamilton's principle. The influences of various parameters on the natural frequencies are investigated including orientation, wall thickness, and inclined angle of the cells in the honeycomb core, thickness of the honeycomb core, mass fraction and type of the nanofibers, agglomeration intensity, and boundary conditions. It is concluded that in each vibrational mode, there are optimum values for the orientation and wall thickness of the cells and thickness of the honeycomb core which result in the highest natural frequency. [ABSTRACT FROM AUTHOR]
Copyright of Noise & Vibration Worldwide is the property of Sage Publications Inc. 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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DbLabel: Engineering Source
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  Data: Frequency analysis of a sandwich conical shell with nanocomposite face layers and a honeycomb core with oriented cells.
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  Data: <searchLink fieldCode="AR" term="%22Amirabadi%2C+Hossein%22">Amirabadi, Hossein</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Darakhsh%2C+Arashk%22">Darakhsh, Arashk</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sarafraz%2C+Mirsalman%22">Sarafraz, Mirsalman</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Afshari%2C+Hassan%22">Afshari, Hassan</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> hassan.afshari@iaukhsh.ac.ir</i>
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  Data: <searchLink fieldCode="JN" term="%22Noise+%26+Vibration+Worldwide%22">Noise & Vibration Worldwide</searchLink>. Jan2025, Vol. 56 Issue 1/2, p98-119. 22p.
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  Data: <searchLink fieldCode="DE" term="%22Hamilton's+principle+function%22">Hamilton's principle function</searchLink><br /><searchLink fieldCode="DE" term="%22Conical+shells%22">Conical shells</searchLink><br /><searchLink fieldCode="DE" term="%22Free+vibration%22">Free vibration</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+nanotubes%22">Carbon nanotubes</searchLink><br /><searchLink fieldCode="DE" term="%22Honeycomb+structures%22">Honeycomb structures</searchLink><br /><searchLink fieldCode="DE" term="%22Polymeric+nanocomposites%22">Polymeric nanocomposites</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this research, the free vibration analysis is investigated for a sandwich conical shell with two nanocomposite face layers and either a hexagonal honeycomb (HH) or a re-entrant honeycomb (RH) core oriented in an arbitrary direction. Both HH and RH cores are orthotropic structures, but the RH is an auxetic structure and the HH is a non-auxetic one. The nanocomposite face layers are fabricated of a polymeric matrix strengthened with uniformly distributed agglomerated either carbon nanotubes (CNTs) or graphene nanoplatelets (GNPs). The sandwich shell is modeled via Murakami's zig-zag theory, and the governing equations and boundary conditions are derived through Hamilton's principle. The influences of various parameters on the natural frequencies are investigated including orientation, wall thickness, and inclined angle of the cells in the honeycomb core, thickness of the honeycomb core, mass fraction and type of the nanofibers, agglomeration intensity, and boundary conditions. It is concluded that in each vibrational mode, there are optimum values for the orientation and wall thickness of the cells and thickness of the honeycomb core which result in the highest natural frequency. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Noise & Vibration Worldwide is the property of Sage Publications Inc. 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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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1177/09574565241306333
    Languages:
      – Code: eng
        Text: English
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        PageCount: 22
        StartPage: 98
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      – SubjectFull: Hamilton's principle function
        Type: general
      – SubjectFull: Conical shells
        Type: general
      – SubjectFull: Free vibration
        Type: general
      – SubjectFull: Carbon nanotubes
        Type: general
      – SubjectFull: Honeycomb structures
        Type: general
      – SubjectFull: Polymeric nanocomposites
        Type: general
    Titles:
      – TitleFull: Frequency analysis of a sandwich conical shell with nanocomposite face layers and a honeycomb core with oriented cells.
        Type: main
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          Name:
            NameFull: Amirabadi, Hossein
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            NameFull: Darakhsh, Arashk
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            NameFull: Sarafraz, Mirsalman
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            NameFull: Afshari, Hassan
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            – D: 01
              M: 01
              Text: Jan2025
              Type: published
              Y: 2025
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            – TitleFull: Noise & Vibration Worldwide
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