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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Single phase 3D phononic band gap material.

Franziska Warmuth1, Maximilian Wormser2, Carolin Körner1,3

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This study introduces a novel single-phase cellular material exhibiting a phononic band gap. Researchers experimentally verified predicted band gaps, demonstrating tunable properties through lattice design.

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Area of Science:

  • Materials Science
  • Acoustics
  • Solid Mechanics

Background:

  • Phononic band gap materials typically require multiple phases to inhibit mechanical wave propagation.
  • Designing single-phase materials with phononic band gaps presents a significant challenge.

Purpose of the Study:

  • To present a novel single-phase cellular material with a phononic band gap.
  • To experimentally verify predicted phononic band gaps using FEM simulations.
  • To demonstrate the tunability of band gap properties through design.

Main Methods:

  • Utilizing lattice structure design based on eigenmode analysis to model different effective phases.
  • Fabricating test samples from a titanium alloy using selective electron beam melting.
  • Employing Finite Element Method (FEM) simulations for band gap prediction.

Main Results:

  • Successful creation of a single-phase cellular material exhibiting a phononic band gap.
  • Experimental verification of phononic band gaps predicted by FEM simulations.
  • Demonstration of tunable band gap position and extension via knowledge-based design.

Conclusions:

  • A novel method for creating phononic band gap materials using a single phase has been developed.
  • The experimental validation confirms the efficacy of the proposed design approach.
  • This work opens avenues for advanced tunable phononic materials.