Combining coupled, staggered and uncoupled solution methods for phase-field-based fracture analysis

Dujc, Jaka (author), Brank, Boštjan (author)

A unified framework for an impromptu switching between the coupled (i.e., the monolithic), the staggered, and the uncoupled solution strategies for the phase-field based computations of material fracture is presented. As a model problem, a 2d quasi-brittle solid phase-field formulation, which is based on the tension-compression split energy functional, is chosen. In order to fit within the proposed framework, the classical staggered approach is reformulated as a loop of uncoupled monolithic steps that we call modified-staggered. Numerical examples show that an automatic switching between the coupled and the modified-staggered solution methods (when the former fails) may shorten the computational times (compared to the pure staggered approach) for an order of magnitude.

• Language: English
• Keywords: civil engineering, structures, fracture modeling, phase-field, monolithic, coupled, staggered, uncoupled
• Work type: Scientific work
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: In print
• Publication version: Version of Record
• Submitted for review: 07.04.2021
• Article acceptance date: 01.09.2021
• Publication date: 20.09.2021
• Year: 2021
• Number of pages: [19] str.
• Numbering: Letn. XX, št. XX
• PID: 20.500.12556/RUL-131848
• UDC: 624.07:004
• ISSN on article: 1537-6494
• DOI: 10.1080/15376494.2021.1976888
• COBISS.SI-ID: 77087747
• Publication date in RUL: 04.10.2021

Record is a part of a journal

• Title: Mechanics of advanced materials and structures
• Shortened title: Mech. adv. mat. struct.
• Publisher: Taylor and Francis
• ISSN: 1537-6494
• COBISS.SI-ID: 24292357

Licences

• License: CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
• Link: http://creativecommons.org/licenses/by-nc/4.0/
• Description: A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
• Licensing start date: 20.09.2021

Secondary language

• Language: Slovenian
• Keywords: gradbeništvo, konstrukcije, modeliranje loma, fazno polje, računske sheme, vgrajena neveznost

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: J2-1722
• Name: Numerično modeliranje širjenja razpok v krhkih in duktilnih konstrukcijah
• Acronym: ComFrac