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- W4281661521 abstract "We present two new models for dynamic beams deduced from three dimensional theory of linear elasticity. The first model is deduced from virtual work considered for small beam sections. For the second model, we suppose a Taylor-Young expansion of the displacement field up to the fourth order in transverse dimensions of the beam. We consider the Fourier series expansion for considering Neumann lateral boundary conditions together with dynamical equations, we obtain a system of fifteen vector equations with the fifteen coefficients vector unknown of the displacement field. For beams with two fold symmetric cross sections commonly used (for example circular, square, rectangular, elliptical…), a unique decomposition of any three-dimensional loads is proposed and the symmetries of these loads is introduced. For these two theories, we show that the initial problem decouples into four subproblems. For an orthotropic material, these four subproblems are completely independent. For a monoclinic material, two subproblems are coupled and independent of the two other coupled subproblems. For the first model, we also give the detailed expression of these four subproblems when we consider the approximation of the displacement field used in the second model." @default.
- W4281661521 created "2022-06-13" @default.
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- W4281661521 date "2022-05-26" @default.
- W4281661521 modified "2023-09-25" @default.
- W4281661521 title "Two New Models for Dynamic Linear Elastic Beams and Simplifications for Double Symmetric Cross-Sections" @default.
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- W4281661521 doi "https://doi.org/10.3390/sym14061093" @default.
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