Shandong University

Songsong Bai

Shucai Li

Chunjin Lin

Liping Li

Shaoshuai Shi

Zongqing Zhou

Weimin Yang

Chenglu Gao

Chengshun Shang

Yang Geng

A discrete element method contact model building method includes: selecting a filling body in a disaster-causing structure to obtain a change rule of cumulative loss of the filling body; performing test simulation, and determining a relation function of each group of corresponding mesoscopic mechanical parameters in each time period and mesoscopic parameters of a DEM contact model representing a change rule of macroscopical parameters of the filling body; embedding each mesoscopic parameter relation function into an existing particle contact model, performing test simulation, and updating a fracture failure criterion of the contact model according to a corresponding relation of macro-mesoscopic strength during model failure; and based on a seepage failure indoor test, building a seepage failure discrete element calculation model, and simulating the seepage failure process of a rock and soil mass by using the obtained particle contact model and the fracture criterion of the particle contact model.

Discrete element method (DEM) contact model building method for reflecting weakening of seepage on rock and soil mass strength

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Jinan, China

Songsong Bai