Finite-Element Formulation of a Nonlocal Hereditary Fractional-Order Timoshenko Beam

Massimiliano Zingales, Massimiliano Zingales, Giuseppe Failla

Risultato della ricerca: Articlepeer review

29 Citazioni (Scopus)

Abstract

A mechanically-based nonlocal Timoshenko beam model, recently proposed by the authors, hinges on the assumption that nonlocal effects can be modeled as elastic long-range volume forces and moments mutually exerted by onadjacent beam segments, which contribute to the equilibrium of any beam segment along with the classical local stress resultants. Long-range volume forces/moments linearly depend on the product of the volumes of the interacting beam segments, and on pure deformation modes of the beam, through attenuation functions governing the space decay of nonlocal effects. This paper investigates the response of this nonlocal beam model when viscoelastic long-range interactions are included, modeled by Caputo’s fractional derivatives. The finite-element method is used to discretize the pertinentfractional-order equations of motion. Closed-form solutions are obtained for creep tests by typical tools of fractional calculus. Numericalresults are presented for various nonlocal parameters.
Lingua originaleEnglish
Numero di pagine13
RivistaJOURNAL OF ENGINEERING MECHANICS
Volume143
Stato di pubblicazionePublished - 2017

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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