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Modelling damage from the nano-scale up

Davie, C. T. and Masoero, E. 2015. Modelling damage from the nano-scale up. Presented at: 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, Vienna, Austria, 21-23 Sept 2015. CONCREEP 10: Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures. ASCE, pp. 613-620. 10.1061/9780784479346.074

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In the light of the developing use of cementitious materials in safety critical, high temperature applications associated with energy industries (nuclear, oil and gas) this work looks to the nano-scale to consider the origins of macro-scale phenomena. It enables a first comparison of nano-scale results with macro-scale observations, toward the inclusion of physico-chemico-mechancial processes in models at larger scales and a move away from phenomenological models. Assuming the development of nano-scale porosity to be the principal effect of temperature at the nano-scale, comparisons are here developed between nano-scale measurements, simulations and macro-scale experimental results. The results suggest that the effect of temperature on the nano/micro mechanical properties of cementitious materials might be responsible for a significant part of the experimentally observed trends at the macro-scale, although more work is required to understand scaling of fracturing. It is concluded that modifying the nano-scale material response to temperature gradients could eventually impact the engineering performance of structures at elevated temperatures.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: ASCE
ISBN: 9780784479346
Last Modified: 21 Oct 2021 09:30

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