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<p>The present study investigates shear wave propagation in a cylindrical composite structure consisting of a porous layer and a fiber-reinforced composite (FRC) layer. The interface between the layers is modeled as a thin membrane within the framework of strain gradient theory. This approach accounts for the significant influence of interfacial stiffness and microstructural effects on wave propagation. The dispersion relation is derived analytically using the appropriate mathematical tools. Additionally, graphical illustrations of interfacial density, porosity, and the strain gradient material constant are provided to enhance the understanding of their effects on wave behavior. The findings provide physical insights of direct relevance to gravity-sensitive wave propagation in composite structures, with potential applications in SHM, NDE, geophysical exploration, and soil mechanics.</p>

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Shear wave behavior in porous cylindrical layered composites using strain gradient theory

  • 期刊论文

  • 发表日期：

    2026年2月18日

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  • Sudarshan Dhua,
  • Arpita Maji,
  • Subrata Mondal

摘要

The present study investigates shear wave propagation in a cylindrical composite structure consisting of a porous layer and a fiber-reinforced composite (FRC) layer. The interface between the layers is modeled as a thin membrane within the framework of strain gradient theory. This approach accounts for the significant influence of interfacial stiffness and microstructural effects on wave propagation. The dispersion relation is derived analytically using the appropriate mathematical tools. Additionally, graphical illustrations of interfacial density, porosity, and the strain gradient material constant are provided to enhance the understanding of their effects on wave behavior. The findings provide physical insights of direct relevance to gravity-sensitive wave propagation in composite structures, with potential applications in SHM, NDE, geophysical exploration, and soil mechanics.