Phase-field modeling of brittle fracture in heterogeneous bars

Autor:	Vicentini, Francesco, Carrara, Pietro, De Lorenzis, Laura
Rok vydání:	2023
Předmět:	Mechanical Engineering FOS: Physical sciences General Physics and Astronomy Heterogeneity Phase-field 1D Fracture toughness Peak stress Applied Physics (physics.app-ph) Physics - Applied Physics Physics::Geophysics Mechanics of Materials General Materials Science
Zdroj:	European Journal of Mechanics. A, Solids, 97
ISSN:	0997-7538 1873-7285
DOI:	10.1016/j.euromechsol.2022.104826
Popis:	We investigate phase-field modeling of brittle fracture in a one-dimensional bar featuring a continuous variation of elastic and/or fracture properties along its axis. Our main goal is to quantitatively assess how the heterogeneity in elastic and fracture material properties influences the observed behavior of the bar, as obtained from the phase-field modeling approach. The results clarify how the elastic limit stress, the peak stress and the fracture toughness of the heterogeneous bar relate to those of the reference homogeneous bar, and what are the parameters affecting these relationships. Overall, the effect of heterogeneity is shown to be strictly tied to the non-local nature of the phase-field regularization. Finally, we show that this non-locality may amend the ill-posedness of the sharp-crack problem in heterogeneous bars where multiple points compete as fracture locations. European Journal of Mechanics. A, Solids, 97 ISSN:0997-7538 ISSN:1873-7285
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b202ad8b25c48239a9ddc762cb29e64 https://doi.org/10.1016/j.euromechsol.2022.104826 Zobrazit plný text záznamu Full Text from ScienceDirect