Experimental investigation and empirical model on damping properties of rock under multistage cyclic loading

Article Engineering, Environmental

The effects of thermal treatments on the fatigue crack growth of Beishan granite: an in situ observation study

Jintao Wang et al.

Summary: In temperature-related rock engineering projects, cyclic loading can lead to different fatigue crack behaviors in rocks. The thermal treatments cause thermal cracking and weakening of mineral grain boundary strength, resulting in changes in crack patterns under cyclic loading. The observations show that as temperature increases, the cracking patterns transition from forward propagation of new cracks to continuous opening of pre-existing cracks.

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2021)

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Article Mining & Mineral Processing

Investigation of the influence of intermediate principal stress on the dynamic responses of rocks subjected to true triaxial stress state

Wei You et al.

Summary: This study introduces a numerical servo triaxial Hopkinson bar (NSTHB) to investigate the dynamic responses of rocks under a true triaxial stress state. The results indicate that the increase in intermediate principal stress leads to an increase in dynamic strength and elastic modulus of rocks, while the dynamic elastic modulus remains independent of the dynamic strain rate. Additionally, the study shows that the intermediate principal stress significantly affects the dynamic failure modes of rocks.

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY (2021)

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Article Engineering, Multidisciplinary

A new hysteretic damping model and application for the combined finite-discrete element method (FDEM)

Penghai Deng et al.

Summary: A new hysteretic damping model and its corresponding critical damping coefficient acquisition method are proposed in this paper, which shows significant influence on the accuracy of FDEM numerical simulation results, especially for quasi-dynamics simulation.

ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS (2021)

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Article Engineering, Civil