On the Finite Element Model of Rotating Functionally Graded Graphene Beams Resting on Elastic Foundation

• Published in: Mathematical problems in engineering Vol. 2021; pp. 1 - 18
• Main Authors: Van Dung, Nguyen, Tho, Nguyen Chi, Ha, Nguyen Manh, Hieu, Vu Trong
• Format: Journal Article
• Language: English
• Published: New York Hindawi 2021; Hindawi Limited
• Subjects: Elastic foundations; Finite element method; Free vibration; Functionally gradient materials; Graphene; Helicopters; Hot weather; Investigations; Kinematics; Mathematical analysis; Mechanical analysis; Mechanical properties; Mechanics; Nanocomposites; Platelets (materials); Propellers; Railway engineering; Railway tracks; Resonant frequencies; Rotation; Shear deformation; Trigonometric functions; Turbines; Vibration analysis; Vibration mode; Vibration response
• ISSN: 1024-123X; 1563-5147
• DOI: 10.1155/2021/1586388

Rotating structures can be easily encountered in engineering practice such as turbines, helicopter propellers, railroad tracks in turning positions, and so on. In such cases, it can be seen as a moving beam that rotates around a fixed axis. These structures commonly operate in hot weather; as a result, the arising temperature significantly changes their mechanical response, so studying the mechanical behavior of these structures in a temperature environment has great implications for design and use in practice. This work is the first exploration using the new shear deformation theory-type hyperbolic sine functions to carry out the free vibration analysis of the rotating functionally graded graphene beam resting on the elastic foundation taking into account the effects of both temperature and the initial geometrical imperfection. Equations for determining the fundamental frequencies as well as the vibration mode shapes of the beam are established, as mentioned, by the finite element method. The beam material is reinforced with graphene platelets (GPLs) with three types of GPL distribution ratios. The numerical results show numerous new points that have not been published before, especially the influence of the rotational speed, temperature, and material distribution on the free vibration response of the structure.