Scholarlink

<p>This study proposes a novel passive damping configuration to enhance the static and dynamic stability of sandwich composite (SWC) beams using vibration-damping compound (VDC) coatings. In the proposed design, commercial damping materials, including high-stiffness-based Decidamp SP450 material and low-stiffness-based butyl rubber material, are applied as thin coatings on the outer surfaces of the stiff face layers of the SWC beam. This approach introduces dual-mode energy dissipation through axial deformation (extension/compression) in the coated layers and shear deformation in the viscoelastic core of the VDC-coated SWC beams. A finite element model based on higher-order layer-wise theory is developed to assess the critical buckling load, damping capacity, and parametric instability behavior. The studies include the influence of VDC material properties and coating thickness. Comparative analysis reveals that the Decidamp-coated SWC beam achieves a 3.124% increase in critical buckling load and a 5.02% enhancement in damping compared to the conventional SWC beam, whereas butyl rubber exhibits lower improvements. Additionally, the performance improvements are more pronounced with increased coating thickness. The coating material and its thickness serve as key tuning parameters for tailoring the structural response. The findings highlight the effectiveness and practical potential of VDC-coated SWC beams for passive vibration and instability control in flexible structures, offering a viable design alternative using commercially available damping materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Static and dynamic instability control of the sandwich composite beam coated with vibration-damping compound

  • 期刊论文

  • 发表日期：

    2026年3月30日

查看全文
  • Abhay Gupta,
  • Vibhooti Narayan Mishra

摘要

This study proposes a novel passive damping configuration to enhance the static and dynamic stability of sandwich composite (SWC) beams using vibration-damping compound (VDC) coatings. In the proposed design, commercial damping materials, including high-stiffness-based Decidamp SP450 material and low-stiffness-based butyl rubber material, are applied as thin coatings on the outer surfaces of the stiff face layers of the SWC beam. This approach introduces dual-mode energy dissipation through axial deformation (extension/compression) in the coated layers and shear deformation in the viscoelastic core of the VDC-coated SWC beams. A finite element model based on higher-order layer-wise theory is developed to assess the critical buckling load, damping capacity, and parametric instability behavior. The studies include the influence of VDC material properties and coating thickness. Comparative analysis reveals that the Decidamp-coated SWC beam achieves a 3.124% increase in critical buckling load and a 5.02% enhancement in damping compared to the conventional SWC beam, whereas butyl rubber exhibits lower improvements. Additionally, the performance improvements are more pronounced with increased coating thickness. The coating material and its thickness serve as key tuning parameters for tailoring the structural response. The findings highlight the effectiveness and practical potential of VDC-coated SWC beams for passive vibration and instability control in flexible structures, offering a viable design alternative using commercially available damping materials.