A mesoscopic model for a better understanding of the transition from diffuse damage to localized damage

作者：Nguyen The Dung^*; Lawrence Claire; La Borderie Christian; Matallah Mohammed; Nahas Georges

来源：European Journal of Environmental and Civil Engineering, 2010, 14(6-7): 751-776.

DOI：10.3166/EJECE.14.751-776

• concrete
• mesoscopic approach
• diffuse damage
• localized damage

The aim of this paper is to present a modelling of mechanical behaviour of concrete on a mesoscopic scale. Concrete is considered as a bi-phasic material where the cement paste and the aggregates are described with their own mechanical characteristics. Firstly, the model is studied in two dimensions in order to optimize the geometrical model of the inner structure of concrete in terms of the meshing strategy and the smallest size of the aggregate to be taken into account, The model shows interesting results on the transition from diffuse to localized damage and is able to reproduce dilatancy in compression. Finally, results of the three-dimensional model are shown in tension.

• 出版日期2010