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Updated: Dec 30, 2025

Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
Published on: June 28, 2024
Seismic phononic crystals by elastodynamic Navier equation.
Dongwoo Lee1, Joo Hwan Oh2, In Seok Kang3
1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.
This study introduces seismic phononic crystals to block seismic waves, inspired by photonic crystals. This innovation could lead to advanced seismic-resistant structures and techniques.
Area of Science:
- Solid mechanics
- Seismology
- Materials science
Background:
- Photonic crystals exhibit complete band gaps, preventing light propagation.
- This concept is extended to seismic wave propagation in engineered materials.
Purpose of the Study:
- To investigate the creation of complete band gaps for seismic body (P) and shear (S) waves.
- To develop thinner, effective seismic phononic crystals.
- To understand material property impacts on wave propagation.
Main Methods:
- Exploiting the elastodynamic Navier equation for seismic phononic crystals.
- Utilizing weak formulation for band structure analysis.
- Estimating propagation length via evanescent modes and complex wave vectors.
Main Results:
- Demonstrated the induction of complete band gaps for P and S seismic waves.
- Developed a method to reduce the physical size of phononic crystals.
- Analyzed the influence of material properties on wave propagation length and particle velocity.
Conclusions:
- Seismic phononic crystals offer a novel approach to controlling seismic wave propagation.
- The findings contribute to the development of advanced seismic-resistant technologies.
- Further research can optimize material selection for enhanced seismic protection.
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