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A specialised finite element for simulating self-healing quasi-brittle materials

Freeman, Brubeck Lee, Bonilla-Villalba, Pedro, Mihai, Iulia, Alnaas, Waled and Jefferson, Anthony 2020. A specialised finite element for simulating self-healing quasi-brittle materials. Advanced Modeling and Simulation in Engineering Sciences 7 , 32. 10.1186/s40323-020-00171-4

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Abstract

A new specialised finite element for simulating the cracking and healing behaviour of quasi-brittle materials is presented. The element employs a strong discontinuity approach to represent displacement jumps associated with cracks. A particular feature of the work is the introduction of healing into the element formulation. The healing variables are introduced at the element level, which ensures consistency with the internal degrees freedom that represent the crack; namely, the crack opening, crack sliding and rotation. In the present work, the element is combined with a new cohesive zone model to simulate damage-healing behaviour and implemented with a crack tracking algorithm. To demonstrate the performance of the new element and constitutive models, a convergence test and two validation examples are presented that consider the response of a vascular self-healing cementitious material system for three different specimens. The examples show that the model is able to accurately capture the cracking and healing behaviour of this type of self-healing material system with good accuracy.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Publisher: SpringerOpen
ISSN: 2213-7467
Funders: UKRI-EPSRC
Date of First Compliant Deposit: 9 July 2020
Date of Acceptance: 11 June 2020
Last Modified: 13 Aug 2020 10:28
URI: http://orca-mwe.cf.ac.uk/id/eprint/133162

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