Micromechanical modelling of self-healing cementitious materials

Davies, Robert ORCID: https://orcid.org/0000-0001-5949-4939 and Jefferson, Anthony ORCID: https://orcid.org/0000-0002-2050-2521 2017. Micromechanical modelling of self-healing cementitious materials. International Journal of Solids and Structures 113-4 , pp. 180-191. 10.1016/j.ijsolstr.2017.02.008

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Abstract

A new approach is described for simulating self-healing behaviour in cementitious materials with a two phase micro-mechanical constitutive model. A Mori-Tanaka homogenisation scheme is employed for the composite along with an exterior point Eshelby solution that accounts for stress concentrations adjacent to inclusions. In addition, anisotropic micro-cracking is simulated using arrays of circular cracks. Self-healing is incorporated into the model by using a novel solidification formulation that models healing under both null and non-zero strain conditions. The focus of the present work is on the recovery of mechanical properties of the micro-cracked material. The performance of the 3D micromechanical self-healing model is illustrated using a series of stress-strain paths that involve damage and healing cycles. The implementation of the model in a layered beam model is also described, as are a series of model validations that employed data from a recent test series undertaken at Cardiff University as well as data from tests undertaken by others. The examples and validations show that the new micro-mechanical self-healing model is capable of representing the characteristic mechanical response of self-healing cementitious materials.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Additional Information:	This is an open access article under the terms of the CC-BY Attribution 4.0 International license.
Publisher:	Elsevier
ISSN:	0020-7683
Funders:	EPSRC
Date of First Compliant Deposit:	30 March 2017
Date of Acceptance:	7 February 2017
Last Modified:	04 May 2023 23:27
URI:	https://orca.cardiff.ac.uk/id/eprint/98642

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