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<p>The buckling behavior of sandwich annular plates comprising a honeycomb core and graphene platelet-reinforced top and bottom layers is studied in this paper using the high-order deformation theory. The structure is in hygrothermal environment with assuming the foundation with spring and shear layer assuming frictional effects. This modeling framework also captures a wider range of deformation behavior that is often missed by lower-order models. Considering this complicated problem, the numerical highly accurate technique of diffrential quadrature method (DQM) is used which efficiently manages the complicated boundary conditions. Finally, extensive numerical simulations are performed in order to analyze the buckling response in depth, focusing on major design parameters like the annular plates inner radius, temperature, moisture, foundation, boundary conditions, friction coefficient and GPL’s volume fraction in the nanocomposite layers. The results highlight the sensitivity of buckling behavior to these changes in design and provide greater insight into the mechanics that controls composite sandwich structures under compressive loads. A larger volume fraction of GPL will increase the buckling load. Increasing temperature from 30 to 45&#xa0;°C decreases the buckling load by about 14%. and moisture content up to 40% lowers the buckling load by approximately 23%. In addition, changing boundary conditions from C–F to C–C raises the buckling load by up to 70%.</p>

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Advanced buckling analysis of graphene-enhanced honeycomb sandwich annular plates in hygrothermal environment considering foundation interaction with frictional effects: a high-order numerical study for enhanced stability

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Hao Zhang,
  • Mohsen Alizadeh,
  • Behzad Royaei

摘要

The buckling behavior of sandwich annular plates comprising a honeycomb core and graphene platelet-reinforced top and bottom layers is studied in this paper using the high-order deformation theory. The structure is in hygrothermal environment with assuming the foundation with spring and shear layer assuming frictional effects. This modeling framework also captures a wider range of deformation behavior that is often missed by lower-order models. Considering this complicated problem, the numerical highly accurate technique of diffrential quadrature method (DQM) is used which efficiently manages the complicated boundary conditions. Finally, extensive numerical simulations are performed in order to analyze the buckling response in depth, focusing on major design parameters like the annular plates inner radius, temperature, moisture, foundation, boundary conditions, friction coefficient and GPL’s volume fraction in the nanocomposite layers. The results highlight the sensitivity of buckling behavior to these changes in design and provide greater insight into the mechanics that controls composite sandwich structures under compressive loads. A larger volume fraction of GPL will increase the buckling load. Increasing temperature from 30 to 45 °C decreases the buckling load by about 14%. and moisture content up to 40% lowers the buckling load by approximately 23%. In addition, changing boundary conditions from C–F to C–C raises the buckling load by up to 70%.