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April 29, 2026Engineering and Technology JournalOpen Access

Free Vibration of Sandwich Panels with Re-Entrant Auxetic Core: A Numerical and Analytical Investigations

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Authors

NANabaa Alaa AldeenUniversity of Technology - IraqSBSadeq Hussein BakhyUniversity of Technology - IraqMHMohsin N. HamzahUniversity of Technology - Iraq

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Implication

Analytical and numerical investigations reveal enhanced vibrational performance of sandwich panels with auxetic cores.

Key Points

  • The aim is to analyze the free-vibration behavior of sandwich panels with re-entrant auxetic cores using both analytical and numerical methods.
  • Constructed an analytical model based on Classical Plate Theory (CPT) for sandwich panels.
  • Validated theoretical predictions with ANSYS 2025 R1 using three-dimensional finite element simulations.
  • Compared results for varying core thicknesses and different core types.
  • Increasing core thickness from 4 mm to 12 mm resulted in a 90% increase in the fundamental natural frequency.
  • High agreement (1.27%–3.37%) observed between analytical and numerical results for core thicknesses up to 8 mm.
  • A 2.43% difference in fundamental frequency was found between auxetic and non-auxetic cores of identical density.

Cite This Study

Aldeen et al. (2026) studied this question.

synapsesocial.com/papers/69f19f74edf4b468248063cchttps://doi.org/10.30684/2412-0758.1547
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Free Vibration Analysis and Experimental Validation of Sandwich Plates with Hollow Tetrahedral Truss Cores2026
  2. 2Free vibration and static analysis of sandwich composite plate with auxetic core and GPLRC facing sheets in hygrothermal environment2024 · 42 citations
  3. 3Dynamic Analysis of Sandwich Plates with Auxetic Honeycomb Core and Laminated FG-CNTRC Facesheets Using a PB-2 Ritz Formulation2026
  4. 4An optimization analysis of a sandwich composite panel with auxetic reentrant core using lichtenberg algorithm based on surrogate modelling2024 · 6 citations
  5. 5Static bending and baseline free-vibration assessment of Type-A functionally graded sandwich plates with a homogenized auxetic core2026