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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Davies, Robert Elfed; Jefferson, Anthony Duncan
Languages: English
Types: Unknown
Subjects:
An approach is described for simulating the behaviour of concrete, and other cementitious composites materials, using micro mechanics. The basic mechanical material model is that presented by Mihai and Jefferson 1 which employs micromechanical solutions of a two-phase composite comprising a matrix phase, spherical inclusions, circular microcracks distributed in the matrix and potentially combining these with a rough crack contact component. The primary focus of the paper is on the enhancement of the model to allow for the future inclusion of time dependent behaviour. This is accomplished by the addition of inelastic strains in the matrix phase. These inelastic strains can be included at the fundamental micromechanical level of the homogenisation process by being included in the compatibility equations and embedded mechanistically into the constitutive equations.
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    • 1. Mihai IC, Jefferson AD. A material model for cementitious composite materials with an exterior point Eshelby microcrack initiation criterion. International Journal of Solids and Structures. 2011;48:3312-3325.
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    • 7. Jefferson AD, Bennett T. Micro-mechanical damage and rough crack closure in cementitious composite materials. Int. J. Numer. Anal. Meth. Geomech. 2007;31(2):133-146.
    • 8. Jefferson AD, Bennett T. A model for cementitious composite materials based on micro-mechanical solutions and damagecontact theory. Computers & Structures. 2009.
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    • 16. Cement and Concrete Association Australia. Concrete Data - Drying Shrinkage of Cement and Concrete. 2002.
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    • 19. Vandamme M, Ulm FJ, Fonollosa P. Nanogranular packing of CSH at substochiometric conditions. Cement and Concrete Research. 2010;40(1):14-26.
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