PSI - Issue 41

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 41 (2022) 576–588

© 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. © 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: Crack propagation; Moving Mesh technique; Interaction integral method Abstract This work pr sents an efficient m deling approach for predicting dy amic crack propagation mechani ms in quasi-brittl materials. The proposed method consists of a standard Finite Element code enhanced by M ving M sh (MM) t chnique on istent with the Arbitrary Lagrangian-Eul rian (ALE) formulation. T MM is used to r produce the geometry evolution caused by dynamically growing cracks. More precisely, the nodes of the computational mes around the crack tip change position during the simulation c nsiste tly with the grow h of the cr ck front. I such a context, the ALE formulation ensures an effective re-location of mesh nodes inside the computational domain, reducing the overall amount of remeshing events. The motion of the computational mesh takes lace according to prev sions dictated by classic fracture criteria, which defin crack initi tion conditions, the direction of propagati , and the veloci y of the advancing crack front. Such conditions depe d on Dynamic Str s Intensity Fac or at the crack front. Hence, accurately predicting these frac ure variables s mandatory to ensure nsiste t mesh motions. To this end, the proposed approach implements the ALE formulation of the M-integral, which nable computing fracture variables on mov ng elements wi hout losing accuracy. The validity of the proposed modeling strategy has been assessed through comparisons with numerical data and analytical formulations reported in the literature. © 2022 The Authors. Published by ELSEVIER B.V. This is an ope acces article under CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) P er-review under responsibility of the M dFract2Guest Editors. Keywords: Crack propagation; Moving Mesh technique; Interaction integral method 2nd Mediterranean Conference on Fracture and Structural Integrity Simulation of dynamic fracture in quasi-brittle materials using a finite element modeling approach enhanced by moving mesh technique and interaction integral method Fabrizio Greco a , Domenico Ammendolea a , Paolo Lonetti a , Arturo Pascuzzo a * a Department of Civil Engineering, University of Calabria, Via P. Bucci, Cubo39B, 87030, Rende, Cosenza, Italy Abstract This work presents an efficient modeling approach for predicting dynamic crack propagation mechanisms in quasi-brittle materials. The proposed method consists of a standard Finite Element code enhanced by Moving Mesh (MM) technique consistent with the Arbitrary Lagrangian-Eulerian (ALE) formulation. The MM is used to reproduce the geometry evolution caused by dynamically growing cracks. More precisely, the nodes of the computational mesh around the crack tip change position during the simulation consistently with the growth of the crack front. In such a context, the ALE formulation ensures an effective re-location of mesh nodes inside the computational domain, reducing the overall amount of remeshing events. The motion of the computational mesh takes place according to previsions dictated by classic fracture criteria, which define crack initiation conditions, the direction of propagation, and the velocity of the advancing crack front. Such conditions depend on Dynamic Stress Intensity Factors at the crack front. Hence, accurately predicting these fracture variables is mandatory to ensure consistent mesh motions. To this end, the proposed approach implements the ALE formulation of the M-integral, which enables computing fracture variables on moving elements without losing accuracy. The validity of the proposed modeling strategy has been assessed through comparisons with numerical data and analytical formulations reported in the literature. 2nd Mediterranean Conference on Fracture and Structural Integrity Simulation of dynamic fracture in quasi-brittle materials using a finite element modeling approach enhanced by moving mesh technique and interaction integral method Fabrizio Greco a , Domenico Ammendolea a , Paolo Lonetti a , Arturo Pascuzzo a * a Department of Civil Engineering, University of Calabria, Via P. Bucci, Cubo39B, 87030, Rende, Cosenza, Italy

* Corresponding author. Tel.: +39-0984-496866 E-mail address: arturo.pascuzzo@unical.it * Corresponding auth r. Tel.: +39-0984-496866 E-mail address: arturo.pascuzzo@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 ope acces article under t 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 under responsibility of the MedFract2Guest Editors. 10.1016/j.prostr.2022.05.066