Adaptive multiscale homogenization of the lattice discrete particle model for the analysis of damage and fracture in concrete

作者：Rezakhani Roozbeh; Zhou Xinwei; Cusatis Gianluca^*

来源：International Journal of Solids and Structures, 2017, 125: 50-67.

DOI：10.1016/j.ijsolstr.2017.07.016

• Adaptive multiscale homogenization
• Adaptive criteria
• Concrete damage and fracture

This paper presents a new adaptive multiscale homogenization scheme for the simulation of damage and fracture in concrete structures. A two-scale homogenization method, coupling meso-scale discrete particle models to macro-scale finite element models, is formulated into an adaptive framework. A continuum multiaxial failure criterion for concrete is calibrated on the basis of fine-scale simulations, and it serves as the adaptive criterion in the multiscale framework. Thus, in this approach, simulations start without assigning any material Representative Volume Element (RVE) to the macro -scale finite elements. The finite elements that meet the adaptive criterion and must be entered into the multiscale homogenization framework are detected on the fly. This leads to a substantial reduction of the computational cost especially for loading conditions leading to damage localization in which only a small portion of the FE mesh is enriched with the homogenized RVE. Several numerical simulations are carried out to investigate the capability of the developed adaptive homogenization method. In addition, a detailed study on the computational cost is performed.

• 出版日期2017-10-15
• 单位西北大学