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A Visco-Elastic DEM Model of Rock Under Different Loading Rates
A numerical model based on two-dimensional Discrete Element Method (DEM) has been used to study the compression of rock under different loading rates, and a visco-elastic Flat-Joint constitutive law has been developed to describe the dynamic behavior of bonded contact between particles. The improved DEM model consists of two parts: (1) Force-displacement equations are derived on the basis of a visco-elastic constitutive model which is formed with a spring and a Maxwell system, and (2) A dynamic fracture criterion of bond is develop to define the increase of strength. The controlling variable method is used to analyze the impact of visco-elastic parameters on the dynamic mechanical properties. With different parameters this model could be used to simulate the compression of rock materials under different loading rates. As an example, visco-elastic parameters of granite are identified, and the obtained stress-strain curves well reproduce the laboratory results.
A Visco-Elastic DEM Model of Rock Under Different Loading Rates
A numerical model based on two-dimensional Discrete Element Method (DEM) has been used to study the compression of rock under different loading rates, and a visco-elastic Flat-Joint constitutive law has been developed to describe the dynamic behavior of bonded contact between particles. The improved DEM model consists of two parts: (1) Force-displacement equations are derived on the basis of a visco-elastic constitutive model which is formed with a spring and a Maxwell system, and (2) A dynamic fracture criterion of bond is develop to define the increase of strength. The controlling variable method is used to analyze the impact of visco-elastic parameters on the dynamic mechanical properties. With different parameters this model could be used to simulate the compression of rock materials under different loading rates. As an example, visco-elastic parameters of granite are identified, and the obtained stress-strain curves well reproduce the laboratory results.
A Visco-Elastic DEM Model of Rock Under Different Loading Rates
Lecture Notes in Civil Engineering
Barla, Marco (editor) / Di Donna, Alice (editor) / Sterpi, Donatella (editor) / He, Xun (author) / He, Yong (author) / Pan, Xuchao (author) / Guo, Lei (author) / Fang, Zhong (author) / Chen, Hong (author) / Shen, Jie (author)
International Conference of the International Association for Computer Methods and Advances in Geomechanics ; 2021 ; Turin, Italy
2021-01-15
9 pages
Article/Chapter (Book)
Electronic Resource
English
A Visco-Elastic DEM Model of Rock Under Different Loading Rates
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