Bandgaps in functionally graded phononic crystals containing graphene origami-enabled metamaterials

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@Article{GUO:2023:ijmecsci,

• author = "Liangteng Guo and Shaoyu Zhao and Yongqiang Guo and Jie Yang and Sritawat Kitipornchai",
• title = "Bandgaps in functionally graded phononic crystals containing graphene origami-enabled metamaterials",
• journal = "International Journal of Mechanical Sciences",
• volume = "240",
• pages = "107956",
• year = "2023",
• ISSN = "0020-7403",
• DOI = "doi:10.1016/j.ijmecsci.2022.107956",
• URL = "https://www.sciencedirect.com/science/article/pii/S0020740322008347",
• keywords = "genetic algorithms, genetic programming, Bandgaps, Phononic crystals, Elastic waves, Graphene origami, Functionally graded distributions, Auxetic metamaterials",
• abstract = "This paper investigates the dispersion characteristics of elastic waves propagating along the thickness direction in functionally graded laminated phononic crystals (FGLPCs) containing novel auxetic metamaterials enabled by graphene origami that is created with the aid of hydrogenation. Both graphene weight fraction and hydrogen coverage which are the key parameters governing the auxetic property are nonuniformly distributed in unit cells of FGLPCs whose material properties are determined by genetic programming-assisted micromechanical models. The dispersion relations of elastic waves in the structure are obtained based on the state space approach and the method of reverberation-ray matrix. A comprehensive parametric study is conducted to discuss the effects of graphene origami weight fraction and hydrogen coverage on bulk waves in elastic solids made of the metamaterial and elastic waves in FGLPCs. It is found that introducing auxetic metamaterials into FGLPCs can effectively manipulate elastic waves. The graded distribution of weight fraction in FGLPCs can lead to bandgaps for both transverse and longitudinal waves, while a through-thickness graded pattern in hydrogen coverage can trigger broad bandgaps for longitudinal waves only with transverse waves nearly unchanged",

}

Genetic Programming entries for Liangteng Guo Shaoyu Zhao Yongqiang Guo Jie Yang Sritawat Kitipornchai

Citations