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<p>Conical shells have various applications in aerospace, power plants, and other engineering fields. This work discusses the vibration and buckling of a truncated conical sandwich micro-shell reinforced with nanomaterials and a honeycomb core. This structure considers composite face sheets reinforced with carbon nanotubes (CNT), and a honeycomb core made of aluminum (Al)/Balsa wood is assumed. For the displacement field, a short conical sandwich structure is assumed based on the first-order shear deformation theory (FSDT). The modified couple stress theory (MCST) is applied to a structure in micro dimensions. The influence of different parameters, including weight percentage of CNT, the core thickness to total thickness ratio, various types of material honeycomb core including Al/Balsa wood, length to radius and radius to thickness ratios, semi-vertical angle, fiber material, number of composite layers, the effect of fiber angle, and the material length scale on the buckling load and frequency are investigated. The results show that the frequency decreases with an enhancement in the radius of the truncated conical&#xa0;shell. Also, increased material length scale parameters enhance the buckling load and frequency. The highest amount of structure stiffness in the conditions of using carbon fibers in single-layer composite surfaces and three-layer composite surfaces with angles of [0,45,90] is&#xa0;compared to other fibers and the highest value of the structure’s resistance in the state of fibers of different layers of composite surfaces with angles [0, 45, 90] is&#xa0;compared to other angles.</p>

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Vibration and Buckling of a Laminated Nano-composite Truncated Conical Micro Sandwich Shell with Balsa Wood/Aluminum Honeycomb Cores

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Iman Shaterzadeh-Chaharsooghi,
  • Mehdi Mohammadimehr,
  • Fatemeh Bargozini

摘要

Conical shells have various applications in aerospace, power plants, and other engineering fields. This work discusses the vibration and buckling of a truncated conical sandwich micro-shell reinforced with nanomaterials and a honeycomb core. This structure considers composite face sheets reinforced with carbon nanotubes (CNT), and a honeycomb core made of aluminum (Al)/Balsa wood is assumed. For the displacement field, a short conical sandwich structure is assumed based on the first-order shear deformation theory (FSDT). The modified couple stress theory (MCST) is applied to a structure in micro dimensions. The influence of different parameters, including weight percentage of CNT, the core thickness to total thickness ratio, various types of material honeycomb core including Al/Balsa wood, length to radius and radius to thickness ratios, semi-vertical angle, fiber material, number of composite layers, the effect of fiber angle, and the material length scale on the buckling load and frequency are investigated. The results show that the frequency decreases with an enhancement in the radius of the truncated conical shell. Also, increased material length scale parameters enhance the buckling load and frequency. The highest amount of structure stiffness in the conditions of using carbon fibers in single-layer composite surfaces and three-layer composite surfaces with angles of [0,45,90] is compared to other fibers and the highest value of the structure’s resistance in the state of fibers of different layers of composite surfaces with angles [0, 45, 90] is compared to other angles.