PSI - Issue 41

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 41 (2022) 439–451

© 2022 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 MedFract2Guest Editors. Abstract Several multiscale approaches have been introduced in the last decades, aimed at investigating the failure behavior of composite materials with reduced computational costs and a high accuracy level at the same time. This is due to their capability to account for the effect of microstructural details on the overall mechanical behavior of such materials. Among the existing multiscale approaches, continuous/discontinuous models have gained increasing interest, by virtue of their ability to overcome the main limitation of purely volumetric approaches, consisting in a spurious mesh sensitivity in the presence of strain localization phenomena. In this work, a novel continuous/discontinuous multiscale model is proposed, used in combination with a hybrid cohesive/volumetric finite element approach for the accurate numerical simulation of pervasive fracture propagation at both the micro- and macro-scales. This approach allows a microscopically informed traction-separation law for the embedded interfaces to be extracted from the homogenized bulk response, derived with reference to a suitably defined Repeating Unit Cell (RUC). The present model is applied to the numerical simulation of microscopic damage phenomena in composite structures. Finally, comparisons with direct numerical simulations on fully meshed specimens are presented for validation purposes, in terms of both loading curves and associated crack patterns. © 2022 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 MedFract2Guest Editors. Keywords: Cohesive/volumetric multiscale approach; Nonlinear homogenization; Embedded interface elements; Transverse cracking; Fiber reinforced composites Abstract Several multiscale approaches have been introduced in the last decades, aimed at investigating the failure behavior of composite mat ials wi h reduced computational costs an a high accuracy level at the same time. This is due to th ir capability t acc unt for the effect of microstruct r l details on the overall mechanical behavior of such materials. Am ng the existing multiscale approaches, continuous/dis ontinuous m dels ha gained increasing interest, by virtue of their ability to overcome the m in limitation of purely volumetric approaches, consisting in a spur ous m sh sensitivity in presence f strain localizatio phenomena. In this w rk, a novel continuous/discontinuous multiscale odel is proposed, us d in combination with hybrid cohesiv /volumetric finite element approach for the acc rate numerical simulat on of pervasiv fracture propagation at both the micro- and macro-s ales. This approach allows a microscopically informed trac -separation law for the embedded interfaces to be extr cted from the homogenized bulk response, derived with reference to a suitably def ned Repea ing Unit C ll (RUC). The present mo el is applied to the numerical simulation of microscopi damage phenome a in composite s ructures. Finally, comparisons with direct numerical si ulation on fully meshed spe imens re pr sented for val dati n urposes, in terms of both l ading curves and associated crack patterns. © 2022 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 u der re ponsibility of the MedFract2Guest Editors. K ywords: Cohesive/volumetric multiscale approach; Nonlinear homogenization; Embedded interface elements; Transverse cracking; Fiber reinforced composites 2nd Mediterranean Conference on Fracture and Structural Integrity A hybrid cohesive/volumetric multiscale finite element model for the failure analysis of fiber-reinforced composite structures Daniele Gaetano a , Fabrizio Greco a *, Lorenzo Leonetti a , Paolo Nevone Blasi a , Arturo Pascuzzo a a Department of Civil Engineering, University of Calabria, Via P. Bucci Cubo 39B, 87036 Rende, Italy 2nd Mediterranean Conference on Fracture and Structural Integrity A hybrid cohesive/volumetric multiscale finite element model for the failure analysis of fiber-reinforced composite structures Daniele Gaetano a , Fabrizio Greco a *, Lorenzo Leonetti a , Paolo Nevone Blasi a , Arturo Pascuzzo a a Department of Civil Engineering, University of Calabria, Via P. Bucci Cubo 39B, 87036 Rende, Italy

* Corresponding author. Tel.: +39 0984 496916. E-mail address: fabrizio.greco@unical.it * Corresponding author. Tel.: +39 0984 496916. E-mail address: fabrizio.greco@unical.it

2452-3216 © 2022 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 MedFract2Guest Editors. 2452-3216 © 2022 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 u der responsibility of t MedFract2Guest Editors.

2452-3216 © 2022 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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.050