TY - JOUR ID - 2089 TI - Compressive Failure Analyses of Rock-Like Materials by Experimental and Numerical Methods JO - Journal of Mining and Environment JA - JME LA - en SN - 2251-8592 AU - Yavari, M. Davood AU - Haeri, H. AU - Sarfarazi, V. AU - Fatehi Marji, M. AU - Lazemi, H. A. AD - Department of Mining Engineering, Bafgh Branch, Islamic Azad University, Bafgh, Iran AD - State Key Laboratory for Deep GeoMechanics and Underground Engineering, Beijing, China AD - Department of Mining Engineering, Hamedan University of Technology, Hamedan, Iran AD - Mine Exploitation Engineering Department, Faculty of Mining and Metallurgy, University of Yazd, Yazd, Iran Y1 - 2021 PY - 2021 VL - 12 IS - 3 SP - 769 EP - 783 KW - Crack Propagation KW - Fracture Mechanics KW - Physical Modeling KW - Finite Element Method KW - Discrete Element Method DO - 10.22044/jme.2021.10819.2052 N2 - Investigating the crack propagation mechanism is of paramount importance in analyzing the failure process of most materials. This process may be exposed during each kind of loading on the materials. In this work, the cracking mechanism in rock-like materials is studied using the numerical methods and compared with the experimental test results. However, the mechanism of crack growth in brittle materials such as rocks is influenced by different parameters. This research work focuses on the effect of the initial crack angles on the crack growth paths of these materials. Some cubic samples containing pre-existing cracks are tested in compression by considering different flaw orientations. The specimens are made of cement, water, and sand. Moreover, the mentioned process is numerically simulated using three different methods: the finite difference method for discontinuous bodies or discrete element method, the displacement discontinuity method, and the versatile finite element method. The micro-parameters for simulation are gained by the trial-and-error procedure for the discrete element method. Eventually, the crack growth paths observed in the experiments are compared with the numerically simulated models. The results obtained show that these central cracks propagate in two ways, which are dependent on their initial angle. By increasing the initial crack angle to greater than 30° (α > 30°), the wing crack path moves further away from the initial crack, and by decreasing α to smaller than 30° (α < 30°), only the shear cracks are initiated. Therefore, the validity and accuracy of the results are manifested by comparing all the corresponding results obtained by different methods. Based on these results, it can generally be concluded that the strength of the cubic (rock material) specimens increases with increase in the crack angles with respect to the applied loading direction. UR - https://jme.shahroodut.ac.ir/article_2089.html L1 - https://jme.shahroodut.ac.ir/article_2089_38e980e77c1b8e06f9a06a3db6b3e1f5.pdf ER -