Experiments on seismic metamaterials: molding surface waves.

By St'ephane Brul'e, Emmanuel H. Javelaud, Stefan Enoch, Sébastien Guenneau. 2014

585 citations recorded by the source corpus.

Materials engineered at the micro- and nanometer scales have had a tremendous and lasting impact in photonics and phononics. At much larger scales, natural soils civil engineered at decimeter to meter scales may interact with seismic waves when the global properties of the medium are modified, or alternatively thanks to a seismic metamaterial constituted of a mesh of vertical empty inclusions bored in the initial soil. Here, we show the experimental results of a seismic test carried out using seismic waves generated by a monochromatic vibrocompaction probe. Measurements of the particles' velocities show a modification of the seismic energy distribution in the presence of the metamaterial in agreement with numerical simulations using an approximate plate model. For complex natural materials such as soils, this large-scale experiment was needed to show the practical feasibility of seismic metamaterials and to stress their importance for applications in civil engineering. We anticipate this experiment to be a starting point for smart devices for anthropic and natural vibrations.

Subfields: Biomedical Engineering, Computer Vision and Pattern Recognition, Electronic, Optical and Magnetic Materials

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Citations in the corpus

How to See Hidden Patterns in Metamaterials with Interpretable Machine Learning (2021, background): “or stiffness [13, 15]) has been experimentally observed at different scales, which has prompted engineers to explore their use in different applications, ranging from materials for advanced batteries [62], to energy harvesting [12], seismic protection [7, 26, 46, 47], vibration or sound insulation [”
Coupling local resonance with Bragg band gaps in single-phase mechanical metamaterials (2017, background): “shielding [1,2] or noise abatement [3] to subwavelength imag-”
Acoustic multi-stopband metamaterial plates design for broadband elastic wave absorption and vibration suppression (2015, background): “[17] experimentally investigated seismic metamaterials interaction with seismic waves by molding the surface waves.”
Mechanical metamaterials associated with stiffness, rigidity and compressibility: a brief review (2017, background): “Initially, rationally designed mechanical metamaterials were developed to control wave propagation in acoustic media [21,22], thin elastic sheets, curved shells [23] and harness elastic instabilities to generate auxetic behaviour [24–27].”
Emergence of seismic metamaterials: Current state and future perspectives (2017, background): “The control of elastic wave trajectories in thin plates was reported numerically [33] and experimentally in 2012 [4] and 2014 [5] for surface seismic waves in civil engineering applications.”