PSI - Issue 66

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2025) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 66 (2024) 82–86

8th International Conference on Crack Paths Comparison between a direct and a regularized method for brittle crack path modeling Gabriele Cricrì a 0F0F0F *, Nunziante Valoroso b 0F a Università di Napoli Federico II, Dipartimento di Ingegneria Industriale, P. Vincenzo Tecchio 80, Naples 80125, Italy b Dipartimento di Ingegneria, Università di Napoli Parthenope, Centro Direzionale Isola C4, Napoli 80143, Italy Abstract We present a comparison between a global energy approach à la Griffith and a regularized model named graded damage for the simulation of brittle and quasi-brittle fracture. In the Griffith-like approach the crack propagation criterion stems from stationarity of the total free energy resulting from the sum of the bulk elastic energy and the surface energy required for crack advancement. On the other side, in graded damage the material degradation takes place in layers of finite thickness where the transition between the sound material and the completely damaged one occurs. A numerical example that refers to a typical benchmark problem is presented that allows showing the features of the two approaches and their ability to reproduce experimental results as well. © 2025 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 2024 Organizers Keywords: Fracture, Damage, Energy release rate, Regularization, Crack path 1. Introduction Modeling and simulation of failure mechanisms and ultimate load carrying capacity of structures are among the most burdensome exercises in civil and mechanical engineering; this is a direct consequence of the fundamental non regularity of damage and fracture, which make numerical computations quite demanding. A typical example is the analysis of brittle fracture in concrete, but the same considerations apply to ductile fracture, delamination and wear. © 2025 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 2024 Organizers

* Corresponding author. Tel.: +39 081 7682540; fax: +39 081 7682110. E-mail address: gabriele.cricri2@unina.it

2452-3216 © 2025 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 2024 Organizers

2452-3216 © 2025 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 2024 Organizers 10.1016/j.prostr.2024.11.057