Pregled bibliografske jedinice broj: 1224709
Length-scale insensitive phase-field model and dual-mesh FEM discretization for phase-field problems for reduced mesh requirements
Length-scale insensitive phase-field model and dual-mesh FEM discretization for phase-field problems for reduced mesh requirements // 10th International Congress of Croatian Society of Mechanics, Book of Abstracts
Pula, Hrvatska, 2022. str. 151-152 (predavanje, podatak o recenziji nije dostupan, prošireni sažetak, znanstveni)
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Naslov
Length-scale insensitive phase-field model and
dual-mesh FEM discretization for phase-field
problems for reduced mesh requirements
Autori
Jukić, Krešimir ; Jarak, Tomislav ; Tonković, Zdenko
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni
Izvornik
10th International Congress of Croatian Society of Mechanics, Book of Abstracts
/ - , 2022, 151-152
Skup
10th International Congress of Croatian Society of Mechanic (ICCSM 2022)
Mjesto i datum
Pula, Hrvatska, 28.09.2022. - 30.09.2022
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Podatak o recenziji nije dostupan
Ključne riječi
phase-field ; fracture ; length-scale sensitivity ; dual mesh
(phase-field, fracture, length-scale sensitivity, dual mesh)
Sažetak
The phase-field (P-F) method is the most promising diffusive approach for modelling fracture phenomena, but it is sensitive on the value of the length-scale parameter [1], and requires the use of high-density mesh as well as high computation costs. This paper presents a length-scale insensitive P-F model. In contrast to the model in [2], where the derivatives of a degradation function and the local part of a crack surface density function with respect to the phase-field at the undamaged state are utilized, we employ the scaling factor of the crack surface density function to obtain length-scale insensitivity. Following ideas from [3], a new family of crack surface density functions and a new softening law concept are introduced, which enable independent calibration of the P-F profile, the stress-strain response and the critical stress. In the conventional Finite Element Method (FEM) framework, a fully broken specimen contains one layer of fully broken elements. To develop this layer, additional spurious fracture energy needs to be dissipated, and the critical energy release rate and the critical force are seemingly increased. To reduce this additional parasitic fracture energy and reduce the mesh density requirements, a discretization by finite elements and finite volumes was utilized in [4]. In this work, a new dual-mesh discretization scheme is proposed, with the primary triangular mesh and the secondary polygonal or triangular mesh.
Izvorni jezik
Engleski
Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti
