[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.12989/sss.2018.22.6.663

The effect of particle size on the edge notched disk (END) using particle flow code in three dimension

Haeri, Hadi (MOE Key Laboratory of Deep Underground Scienceand Engineering, School of Architectureand Environment, Sichuan University)
Sarfarazi, Vahab (Department of Mining Engineering, Hamedan University of Technology)
Zhu, Zheming (MOE Key Laboratory of Deep Underground Scienceand Engineering, School of Architectureand Environment, Sichuan University)
Marji, Mohammad Fatehi (Department of Mining Engineering, Yazd University)

Publication Information

Smart Structures and Systems / v.22, no.6, 2018 , pp. 663-673 More about this Journal

Abstract

In this study, the effect of particle size on the cracks propagation and coalescence or cracking pattern of the edge notched disc specimens are investigated. Firstly, calibration of PFC3D was performed using Brazilian experimental test output. Then micro parameters were used to build edge notched disc specimen. The horizontal wall of the assembly is let to move downward with a standard low speed of 0.016 m/s. The numerical results show that the tensile cracks are dominant failure pattern for the modeled discs. These tensile cracks initiate from the pre-existing notch tip and propagate parallel to the loading direction then interact with the upper boundary of the modeled specimen. As the size of the balls (ball diameter) decrease the number of tensile cracks increase. The tensile fracture toughness of the samples also decreases as the particle size increases. Understanding the crack propagation and crack coalescence phenomena in brittle materials such as concretes and rocks is of paramount importance in the stability analyses for engineering structures such as rock slopes, underground structures and tunneling.

Keywords

END test; pre-existing edge crack; PFC3D;

Citations & Related Records

Times Cited By KSCI : 14 (Citation Analysis)

Reference
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