Applied Mathematics and Mechanics (English Edition) ›› 2022, Vol. 43 ›› Issue (3): 371-388.doi: https://doi.org/10.1007/s10483-022-2818-6

• 论文 • 上一篇    下一篇

Bending and vibration of two-dimensional decagonal quasicrystal nanoplates via modified couple-stress theory

Miao ZHANG1, Junhong GUO1,2, Yansong LI3   

  1. 1. Department of Mechanics, Inner Mongolia University of Technology, Hohhot 010051, China;
    2. School of Aeronautics, Inner Mongolia University of Technology, Hohhot 010051, China;
    3. College of Architecture and Civil Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong Province, China
  • 收稿日期:2021-08-04 修回日期:2021-11-09 发布日期:2022-02-22
  • 通讯作者: Junhong GUO, E-mail: jhguo@imut.edu.cn
  • 基金资助:
    the National Natural Science Foundation of China (Nos. 11862021 and 12072166), the Program for Science and Technology of Inner Mongolia Autonomous Region of China (No. 2021GG0254), and the Natural Science Foundation of Inner Mongolia Autonomous Region of China (No. 2020MS01006)

Bending and vibration of two-dimensional decagonal quasicrystal nanoplates via modified couple-stress theory

Miao ZHANG1, Junhong GUO1,2, Yansong LI3   

  1. 1. Department of Mechanics, Inner Mongolia University of Technology, Hohhot 010051, China;
    2. School of Aeronautics, Inner Mongolia University of Technology, Hohhot 010051, China;
    3. College of Architecture and Civil Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong Province, China
  • Received:2021-08-04 Revised:2021-11-09 Published:2022-02-22
  • Contact: Junhong GUO, E-mail: jhguo@imut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China (Nos. 11862021 and 12072166), the Program for Science and Technology of Inner Mongolia Autonomous Region of China (No. 2021GG0254), and the Natural Science Foundation of Inner Mongolia Autonomous Region of China (No. 2020MS01006)

摘要: Based on the modified couple-stress theory, the three-dimensional (3D) bending deformation and vibration responses of simply-supported and multilayered two-dimensional (2D) decagonal quasicrystal (QC) nanoplates are investigated. The surface loading is assumed to be applied on the top surface in the bending analysis, the traction-free boundary conditions on both the top and bottom surfaces of the nanoplates are used in the free vibration analysis, and a harmonic concentrated point loading is applied on the top surfaces of the nanoplates in the harmonic response analysis. The general solutions of the extended displacement and traction vectors for the homogeneous QC nanoplates are derived by solving the eigenvalue problem reduced from the final governing equations of motion with the modified couple-stress effect. By utilizing the propagator matrix method, the analytical solutions of the displacements of the phonon and phason fields for bending deformation, the natural frequency of free vibration, and the displacements of the phonon and phason fields for the harmonic responses are obtained. Numerical examples are illustrated to show the effects of the quasiperiodic direction, the material length scale parameter, and the the stacking sequence of the nanoplates on the bending deformation and vibration responses of two sandwich nanoplates made of QC and crystal materials.

关键词: quasicrystal (QC), bending, vibration, layered nanoplate

Abstract: Based on the modified couple-stress theory, the three-dimensional (3D) bending deformation and vibration responses of simply-supported and multilayered two-dimensional (2D) decagonal quasicrystal (QC) nanoplates are investigated. The surface loading is assumed to be applied on the top surface in the bending analysis, the traction-free boundary conditions on both the top and bottom surfaces of the nanoplates are used in the free vibration analysis, and a harmonic concentrated point loading is applied on the top surfaces of the nanoplates in the harmonic response analysis. The general solutions of the extended displacement and traction vectors for the homogeneous QC nanoplates are derived by solving the eigenvalue problem reduced from the final governing equations of motion with the modified couple-stress effect. By utilizing the propagator matrix method, the analytical solutions of the displacements of the phonon and phason fields for bending deformation, the natural frequency of free vibration, and the displacements of the phonon and phason fields for the harmonic responses are obtained. Numerical examples are illustrated to show the effects of the quasiperiodic direction, the material length scale parameter, and the the stacking sequence of the nanoplates on the bending deformation and vibration responses of two sandwich nanoplates made of QC and crystal materials.

Key words: quasicrystal (QC), bending, vibration, layered nanoplate

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