Combining coupled, staggered and uncoupled solution methods for phase-field-based fracture analysis. Issue 27 (14th December 2022)

• Record Type: Journal Article
• Authors: Dujc, Jaka; Brank, Boštjan
• Is Part Of: Mechanics of advanced materials and structures. Volume 29:Issue 27(2022)
• Page Start: 6361
• Page End: 6378
• Publication Date: 2022-12-14
• Subjects: Fracture modeling -- phase-field -- monolithic -- coupled -- staggered -- uncoupled; Composite materials -- Mechanical properties -- Periodicals; Composite construction -- Periodicals; 620.118
• DOI: 10.1080/15376494.2021.1976888
• Languages: English
• ISSNs: 1537-6494

Abstract

Abstract: 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.