Work

A multi-scale model of plasticity and damage for rock-like materials with pores and inclusions

Year: 2020

Type: article

Abstract: A multi-scale model is developed for modeling of plastic deformation and induced damage in rock-like materials containing pores and mineral inclusions. An analytical macroscopic plastic yield criterion is first determined from three steps of homogenization. This criterion explicitly takes into account respective effects of two populations of pores and mineral inclusions at three different scales. The accuracy of criterion is evaluated by comparisons with numerical results issued from direct simulations on representative volume elements. Then, an induced damage evolution law is defined to describe the onset and growth of micro-cracks inside the solid matrix of materials. The induced damage affects both elastic and strength properties of the solid matrix and its evolution is coupled with the plastic deformation. The performance of the proposed model is first assessed through a series of numerical examples, clearly showing influences of pores and inclusions on macroscopic responses of heterogeneous materials. Finally, the proposed model is applied to describe mechanical behaviors of clayey rocks. Comparisons between numerical results and experimental data are presented.

Source: International Journal of Rock Mechanics and Mining Sciences

DOI: 10.1016/j.ijrmms.2020.104579

Authors: Y.J. Cao, W.Q. Shen, J.F. Shao, W. Wang

Institutions: Centre National de la Recherche Scientifique, Hohai University, Université de Lille, Laboratoire de Mécanique, Multiphysique, Multiéchelle

Language: English

Topic: Rock Mechanics and Modeling

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,500

Funders: National Natural Science Foundation of China, Ministry of Education, India, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities