Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Francesco Marotti de Sciarra"'
Publikováno v:
Encyclopedia, Vol 3, Iss 1, Pp 279-310 (2023)
Recent developments in modeling and analysis of nanostructures are illustrated and discussed in this paper. Starting with the early theories of nonlocal elastic continua, a thorough investigation of continuum nano-mechanics is provided. Two-phase loc
Externí odkaz:
https://doaj.org/article/36aede313c1346159639fbc5651fed86
Autor:
Andrea Apuzzo, Raffaele Barretta, Francesco Fabbrocino, S. Ali Faghidian, Raimondo Luciano, Francesco Marotti de Sciarra
Publikováno v:
Journal of Applied and Computational Mechanics, Vol 5, Iss 2, Pp 402-413 (2019)
Size-dependent longitudinal and torsional vibrations of nano-beams are examined by two-phase mixture integral elasticity. A new and efficient elastodynamic model is conceived by convexly combining the local phase with strain- and stress-driven purely
Externí odkaz:
https://doaj.org/article/5190091fca614e09b7cf7715c58a48a3
Publikováno v:
Nanomaterials, Vol 12, Iss 15, p 2676 (2022)
Eigenfrequencies of a nanobeam with a point mass interacting with a heavy fluid are calculated using Bernoulli-Euler kinematics and consistent nonlocal elasticity model. The proposed approach is applicable to a variety of nanotechnology materials and
Externí odkaz:
https://doaj.org/article/548c9e975ffc4c1981c8088a3b21403e
Publikováno v:
Mathematics, Vol 10, Iss 3, p 477 (2022)
A consistent nonlocal viscoelastic beam model is proposed in this paper. Specifically, a Timoshenko bending problem, where size- and time-dependent effects cannot be neglected, is investigated. In order to inspect scale phenomena, a stress-driven non
Externí odkaz:
https://doaj.org/article/0b14024c923c41cabce6f4607dd8c03b
Publikováno v:
PSU Research Review, Vol 1, Iss 2, Pp 164-169 (2017)
Purpose – This study aims to model scale effects in nano-beams under torsion. Design/methodology/approach – The elastostatic problem of a nano-beam is formulated by a novel stress-driven nonlocal approach. Findings – Unlike the standard strain-
Externí odkaz:
https://doaj.org/article/5842960b9db348cab1d8c254e561e5d5
Autor:
Marzia Sara Vaccaro, Francesco Paolo Pinnola, Francesco Marotti de Sciarra, Raffaele Barretta
Publikováno v:
Nanomaterials, Vol 11, Iss 5, p 1138 (2021)
The dynamic behaviour of micro- and nano-beams is investigated by the nonlocal continuum mechanics, a computationally convenient approach with respect to atomistic strategies. Specifically, size effects are modelled by expressing elastic curvatures i
Externí odkaz:
https://doaj.org/article/a7e2f4f0883046caa33755274fe0b40b
Autor:
Marzia Sara Vaccaro, Francesco Paolo Pinnola, Francesco Marotti de Sciarra, Raffaele Barretta
Publikováno v:
Nanomaterials, Vol 11, Iss 3, p 573 (2021)
The simplest elasticity model of the foundation underlying a slender beam under flexure was conceived by Winkler, requiring local proportionality between soil reactions and beam deflection. Such an approach leads to well-posed elastostatic and elasto
Externí odkaz:
https://doaj.org/article/45659298f0024e0f8db358c25f00432b
Autor:
Dario Abbondanza, Daniele Battista, Francescogiuseppe Morabito, Chiara Pallante, Raffaele Barretta, Raimondo Luciano, Francesco Marotti de Sciarra, Giuseppe Ruta
Publikováno v:
Journal of Applied and Computational Mechanics, Vol 2, Iss 2, Pp 54-64 (2016)
Linear dynamic response of simply supported nanobeams subjected to a variable axial force is assessed by Galerkin numerical approach. Constitutive behavior is described by three functional forms of elastic energy densities enclosing nonlocal and stra
Externí odkaz:
https://doaj.org/article/37f33487f4594f92aa64e8e03d997435
Publikováno v:
Symmetry, Vol 12, Iss 5, p 717 (2020)
The research at hand deals with the mechanical behavior of beam-like nanostructures. Nanobeams are assembled of multiple layers of different materials and geometry giving a layered nanobeam. To properly address experimentally noticed size effects in
Externí odkaz:
https://doaj.org/article/6a3d1f9acb31439cacd1b454698dc169
Publikováno v:
Applied Sciences, Vol 9, Iss 3, p 514 (2019)
Nowadays, the modified nonlocal strain gradient theory provides a mathematically well-posed and technically reliable methodology to assess scale effects in inflected nano-structures. Such an approach is extended in this paper to investigate the exten
Externí odkaz:
https://doaj.org/article/d905bbc4185b4f50bfbc0961d14b3034