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<p>Sandwich plate consisting of an auxetic core and three-phase composite facesheets is increasingly recognized as a structure that ensures the requirements of mechanical strength, energy absorption, and protection of internal structures. Despite their potential, existing studies on this structure still exhibit several limitations. Therefore, this study investigates the stability of these sandwich plates using analytical methods. Based on the higher-order shear deformation theory (HSDT), governing equations for determining the critical buckling load and the nonlinear load-deflection relationship are derived. The accuracy of the proposed model is validated against established results from the literature. Furthermore, the effects of geometric parameters, elastic foundations, fiber orientation, volume fraction, and auxetic cell inclination angles on the buckling and post-buckling responses are systematically analyzed.</p>

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Stability analysis of imperfect sandwich plate with auxetic core and three-phase composite face sheets using higher order shear plate theory

  • 期刊论文

  • 发表日期：

    2026年7月31日

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  • Anh Vu Minh,
  • Dat Dinh Van,
  • Quan Tran Quoc,
  • Duc Nguyen Dinh

摘要

Sandwich plate consisting of an auxetic core and three-phase composite facesheets is increasingly recognized as a structure that ensures the requirements of mechanical strength, energy absorption, and protection of internal structures. Despite their potential, existing studies on this structure still exhibit several limitations. Therefore, this study investigates the stability of these sandwich plates using analytical methods. Based on the higher-order shear deformation theory (HSDT), governing equations for determining the critical buckling load and the nonlinear load-deflection relationship are derived. The accuracy of the proposed model is validated against established results from the literature. Furthermore, the effects of geometric parameters, elastic foundations, fiber orientation, volume fraction, and auxetic cell inclination angles on the buckling and post-buckling responses are systematically analyzed.