PSI - Issue 39

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 ScienceDirect

www.elsevier.com/locate/procedia

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ScienceDirect

Procedia Structural Integrity 39 (2022) 649–662

© 2021 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 CP 2021 – Guest Editors © 2021 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 CP 2021 – Guest Editors Ab tract This work presents an effici nt FE mod ling approach for pre icting crack prop gation mechan sms in Functio ally G ade Mate ials (FGMs). The proposed stra egy c mbines the Moving Mesh (MM) technique an the I teraction Int gral method ( M int gral). The MM is used to reproduce th geometry evolution induced by th crack adv nce. Specifically, the mesh nodes ar und the crack tip are moved in such a way to follow c ck p th evolutions, thus reducing the need for continuo s rem shing events that affect egatively the computational eff ciency of standard FE m deling strategies. In particular, th proposed s heme empl ys a oving mesh strategy consis nt with the Arbitrary Lagrangian-Eulerian (ALE) formulation, which is suitable for handling the motion of mesh n des w th great flexibility. In ddition, the use of proper regularization procedures ensures the consistency of the mesh motion, reducing elevated elements distortions. The m tion of the mesh nod s requires a roper defin tion of crack onset conditions and propagation direction. Hence, a correct evaluation of fracture variables t the crack front ( i.e. , Stress Int sity Factors and T-stress) is necessary. For this purpose, the p oposed method adopts th M -integral approach, which i a widely used m thod due to its simplicity nd accuracy. Since the cr ck front moves du ing the crack advance, the M -integral is implemented by using the ALE formulation, thus extracting fracture variables on distorting elements. The validity of the proposed strategy has been validated thr ugh comparisons with experimental and numerical data reported in the literature. © 2021 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 CP 2021 – Guest Editors 7th International Conference on Crack Paths On the combination of Moving Mesh technique and M-integral method for predicting crack propagation mechanisms in Functionally Graded Materials Arturo Pascuzzo a , Fabrizio Greco a *, Domenico Ammendolea a , Paolo Lonetti a , Daniele Gaetano a a Department of Civil Engineering, University of Calabria, Via P. Bucci, Cubo39B, 87030, Rende, Cosenza, Italy Abstract This work presents an efficient FE modeling approach for predicting crack propagation mechanisms in Functionally Graded Materials (FGMs). The proposed strategy combines the Moving Mesh (MM) technique and the Interaction Integral method ( M integral). The MM is used to reproduce the geometry evolution induced by the crack advance. Specifically, the mesh nodes around the crack tip are moved in such a way to follow crack path evolutions, thus reducing the need for continuous remeshing events that affect negatively the computational efficiency of standard FE modeling strategies. In particular, the proposed scheme employs a moving mesh strategy consistent with the Arbitrary Lagrangian-Eulerian (ALE) formulation, which is suitable for handling the motion of mesh nodes with great flexibility. In addition, the use of proper regularization procedures ensures the consistency of the mesh motion, reducing elevated elements distortions. The motion of the mesh nodes requires a proper definition of crack onset conditions and propagation direction. Hence, a correct evaluation of fracture variables at the crack front ( i.e. , Stress Intensity Factors and T-stress) is necessary. For this purpose, the proposed method adopts the M -integral approach, which is a widely used method due to its simplicity and accuracy. Since the crack front moves during the crack advance, the M -integral is implemented by using the ALE formulation, thus extracting fracture variables on distorting elements. The validity of the proposed strategy has been validated through comparisons with experimental and numerical data reported in the literature. 7th International Conference on Crack Paths On th c mbination of Moving Mesh techniqu and M-integral method for predi ting crack propagation mechanisms in Functionally Graded Materials Arturo Pascuzzo a , Fabrizio Greco a *, Domenico Ammendolea a , Paolo Lonetti a , Daniele Gaetano a a Department of Civil Engineering, University of Calabria, Via P. Bucci, Cubo39B, 87030, Rende, Cosenza, Italy

* Corresponding author. Tel.: +39-0984-496816 E-mail address: fabrizio.greco@unical.it

2452-3216 © 2021 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 CP 2021 – Guest Editors 2452-3216 © 2021 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 CP 2021 – Guest Editors * Corresponding author. Tel.: +39-0984-496816 E mail address: fabrizio.g eco@unical.it

2452-3216 © 2021 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 CP 2021 – Guest Editors 10.1016/j.prostr.2022.03.138