期刊
PHYSICAL REVIEW LETTERS
卷 118, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.214301
关键词
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资金
- European Union's Horizon research and innovation program under Marie Sklodowska-Curie Grant [658483]
- European Union's program for research and innovation under Marie Sklodowska-Curie Grant [609402-2020]
- European Research Council [693670]
- European Commission H2020 under Graphene Flagship [696656]
- FET Proactive Neurofibres [732344]
- Neurofibres [732344]
- Marie Curie Actions (MSCA) [658483] Funding Source: Marie Curie Actions (MSCA)
The appearance of nonlinear effects in elastic wave propagation is one of the most reliable and sensitive indicators of the onset of material damage. However, these effects are usually very small and can be detected only using cumbersome digital signal processing techniques. Here, we propose and experimentally validate an alternative approach, using the filtering and focusing properties of phononic crystals to naturally select and reflect the higher harmonics generated by nonlinear effects, enabling the realization of time-reversal procedures for nonlinear elastic source detection. The proposed device demonstrates its potential as an efficient, compact, portable, passive apparatus for nonlinear elastic wave sensing and damage detection.
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