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• W3208858711 endingPage "106887" @default.
• W3208858711 startingPage "106887" @default.
• W3208858711 abstract "The paper proposes a closed-form dynamic stiffness (DS) formulation for exact transverse free vibration analysis of tapered and/or functionally graded beams based on Euler–Bernoulli theory. The novelties lie in both the DS formulation and the solution technique. For the formulation, the developed DS is applicable to a wide range of non-uniform beams whose bending stiffness and linear density are assumed to be polynomial functions of position. This fills a gap of existing closed-form DS element library which is generally limited to linearly tapered/functionally graded beams. For the solution technique, an elegant and efficient J 0 count of tapered element is proposed to apply the Wittrick-Williams (WW) algorithm most effectively. The investigation sheds lights on the so-called J 0 count challenge of the algorithm for other DS elements. The above two novelties make exact and highly efficient modal analysis possible for a wide range of tapered and/or functionally graded beams, without resorting to series solution, numerical integrations or refined mesh discretization . Results for a particular case show excellent agreement with published results. Moreover, we investigate the effects of the taper/functional gradient rate/index and boundary conditions on the free vibration behaviour. Benchmark solutions are provided for individual beams as well as beam assemblies. • Closed-form DS for transverse vibration of tapered/functionally graded beams. • Applicable to multiform tapered and/or functionally graded beams and assemblies. • It fills the gap of and complete the closed-form DS element library of tapered/functionally graded beams. • Elegant and efficient J0 count of tapered element is proposed for the WW algorithm. • Effects of taper/functional gradient rate/index and BCs on vibration are investigated." @default.
• W3208858711 created "2021-11-08" @default.
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• W3208858711 date "2022-01-01" @default.
• W3208858711 modified "2023-09-24" @default.
• W3208858711 title "Closed-form dynamic stiffness formulation for exact modal analysis of tapered and functionally graded beams and their assemblies" @default.
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• W3208858711 doi "https://doi.org/10.1016/j.ijmecsci.2021.106887" @default.
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