PSI - Issue 47

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 47 (2023) 789–799

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons Abstract In this study, the stress-driven model incorporating surface energy effects (SSDM), developed by one of the authors for study the mechanical response of a functionally graded (FG) nanobeams under constant distributed transverse loading, is extended and applied for the bending analysis of FG nanobeams in presence of discontinuous distributed loadings. Compared to its original formulation, the novel proposed approach assumes that the nanobeam is divided in two parts due the load discontinuity at an internal point of the nanobeam axis. Therefore, the governing equations and the related standard boundary conditions are derived by applying the principle of virtual work in each part of the FG nanobeam. As widely discussed in literature, additional compatibility boundary conditions and constitutive continuity conditions must be satisfied at the interior point where the loading discontinuity occurs. Several results of a parametric analysis are presented to show the effectiveness of the proposed novel approach. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons Keywords : Nonlocal theory, Stress-Driven-Model, Nanobeam, Surface effects, Loading discontinuities 27th International Conference on Fracture and Structural Integrity (IGF27) A stress-driven model incorporating surface energy effects for the bending analysis of functionally graded nanobeams with loading discontinuities Rosa Penna a, *, Luciano Feo a , Giuseppe Lovisi a , Arturo Pascuzzo b a Department of Civil Engineering, University of Salerno, Fisciano, Italy b Department of Civil Engineering, University of Calabria, Rende, Italy Abstract In this study, the stress-driven model incorporating surface energy effects (SSDM), developed by one of the authors for study the mechanical response of a functionally graded (FG) nanobeams under constant distributed transverse loading, is extended and applied for the bending analysis of FG nanobeams in presence of discontinuous distributed loadings. Compared to its original formulation, the novel proposed approach assumes that the nanobeam is divided in two parts due the load discontinuity at an internal point of the nanobeam axis. Therefore, the governing equations and the related standard boundary conditions are derived by applying the principle of virtual work in each part of the FG nanobeam. As widely discussed in literature, additional compatibility boundary conditions and constitutive continuity conditions must be satisfied at the interior point where the loading discontinuity occurs. Several results of a parametric analysis are presented to show the effectiveness of the proposed novel approach. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons Keywords : Nonlocal theory, Stress-Driven-Model, Nanobeam, Surface effects, Loading discontinuities 27th International Conference on Fracture and Structural Integrity (IGF27) A stress-driven model incorporating surface energy effects for the bending analysis of functionally graded nanobeams with loading discontinuities Rosa Penna a, *, Luciano Feo a , Giuseppe Lovisi a , Arturo Pascuzzo b a Department of Civil Engineering, University of Salerno, Fisciano, Italy b Department of Civil Engineering, University of Calabria, Rende, Italy

* Corresponding author. Tel.: +39-089-964-078 E-mail address: rpenna@unisa.it * Corresponding author. Tel.: +39-089-964-078 E-mail address: rpenna@unisa.it

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons 2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the IGF27 chairpersons 10.1016/j.prostr.2023.07.040