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Micromechanics-driven variational method for diffuse-to-localised fracture in quasi-brittle solids

Azua-Gonzalez, Carlos X., Mihai, Iulia C. ORCID: and Jefferson, Tony ORCID: 2021. Micromechanics-driven variational method for diffuse-to-localised fracture in quasi-brittle solids. Presented at: 14th WCCM-Ecomas Congress 2020, Virtual, 11-15 January 2021. WCCM-ECCOMAS2020. , vol.100 Scipedia, 10.23967/wccm-eccomas.2020.200

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A novel multiscale variational method for modelling fracture propagation is proposed. The method employs strong discontinuity kinematics enhancement, enabling macroscopic cracks to be modelled explicitly, while minimum remeshing is ensured. In addition, the response of quadrature points in the bulk is up-scaled using a Micromechanical continua, which enables the evolution of directional micro-defects (e.g. microcracks) without venturing into prohibitive computational burden. Noticeably, the method allows the Micromechanical continua to interact with macroscopic cracks. The framework is conveniently formulated as a variational setting to provide a minimum energy solution. The new computational framework has been found to diagnose realistic failure mechanisms in quasi-brittle materials.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Engineering
Publisher: Scipedia
Date of First Compliant Deposit: 24 January 2022
Last Modified: 10 Nov 2022 10:22

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