报告摘要
Second gradient models allow us to take into account effects occurring at smaller scales (microstructure), which are relevant to the study of certain civil engineering problems. Among the various models, the approach proposed by Chambon et al will be used, as it maintains the local character of the equations to be solved. This approach proves useful for reproducing deformation localization phenomena observed at laboratory scale. These models generally consider a purely mechanical problem with no coupling effects. We propose to extend these models to hydro-mechanical and thermo-hydro-mechanical coupled problems, which are particularly relevant to nuclear waste disposal. In order to protect the biosphere from the harmful effects of radioactive waste, the solution envisaged is to build a network of galleries in which the waste will be stored. It is therefore necessary to model the various stages of storage in order to guarantee the integrity of the system.
主讲人简介
Frédéric Collinis full professor in Geotechnical Engineering in the Research unit of Urban and Environmental Engineering (UEE) at University of Liège, Belgium. He is the director of UEE. He also served as the director of ALERT Geomaterials from 2017 to 2024. He received his Master degree as well as his PhD in Engineering Sciences from the University of Liège. As a postdoctoral researcher at FRS-FNRS, Frédéric did a research stay in the Laboratoires 3SR at Université Grenoble Alpes, where he started developing the coupled second gradient model. As a post doc he also moved to Australia at Newcastle University to model the underground coal seam fire. In 2011, he got an academic position as assistant professor and he further developed the finite element code Lagamine, which is the base line of all his research.
协办单位：浙江省力学学会岩土力学与工程专业委员会、浙江省岩土力学与工程学会本构理论与数值分析专业委员会、浙江大学岩土工程计算中心