Does the mantis shrimp pack a phononic shield?

• 成果类型: Article
• 署名作者: Alderete, N. A.; Sandeep, S.; Raetz, S.; Asgari, M.; Abi Ghanem, M.; Espinosa, H. D.
• 署名单位: Northwestern University; Le Mans Universite; Centre National de la Recherche Scientifique (CNRS); CNRS - Institute for Engineering & Systems Sciences (INSIS); Universite Claude Bernard Lyon 1; Centre National de la Recherche Scientifique (CNRS)
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13981
• DOI: 10.1126/science.adq7100
• 发表日期: 2025-02-07
• 页码: 659-666
• 关键词: impact; generation; toughness; mechanics; strike; waves

摘要

The powerful strikes generated by the smasher mantis shrimp require it to possess a robust protection mechanism to withstand the resultant forces. Although recent studies have suggested that phononic bandgaps complement the mantis shrimp's defensive suite, direct experimental evidence for this mechanism has remained elusive. In this work, we explored the phononic properties of the mantis shrimp's dactyl club using laser ultrasonic techniques and numerical simulations. Our results demonstrate that the dactyl club's periodic region functions as a dispersive, high-quality graded system, exhibiting Bloch harmonics, flat dispersion branches, ultraslow wave modes, and wide Bragg bandgaps in the lower megahertz range. These features effectively shield the shrimp from harmful high-frequency stress waves generated by cavitation bubble collapse events during impact.