Dynamic stiffness formulation and free vibration analysis of functionally graded beams

A GENERAL ALGORITHM FOR COMPUTING NATURAL FREQUENCIES OF ELASTIC STRUCTURES

W. H. Wittrick, F.W. Williams · The Quarterly Journal of Mechanics and Applied Mathematics · 1971 · 810 citations

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A new beam finite element for the analysis of functionally graded materials

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A unified approach for analyzing static and dynamic behaviors of functionally graded Timoshenko and Euler–Bernoulli beams

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Free vibration characteristics of a functionally graded beam by finite element method

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Free vibration analysis of functionally graded beams with simply supported edges

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