Discussion on Failure Mechanism and Strength Criterion of Sandstone Based on Particle Discrete Element Method

2021 ◽  
Author(s):  
Shuguang Zhang ◽  
Lei Chen ◽  
Pingping Lu ◽  
Wenbo Liu
Keyword(s):  
Discrete Element Method ◽  
Failure Mechanism ◽  
Strength Criterion ◽  
Discrete Element ◽  
Element Method

scholarly journals Application of the discrete element method for modeling of rock crack propagation and coalescence in the step-path failure mechanism

2013 ◽  
Vol 153 ◽  
pp. 80-94 ◽  
Author(s):  
Luis Arnaldo Mejía Camones ◽  
Eurípedes do Amaral Vargas ◽  
Rodrigo Peluci de Figueiredo ◽  
Raquel Quadros Velloso
Keyword(s):  
Discrete Element Method ◽  
Crack Propagation ◽  
Failure Mechanism ◽  
Discrete Element ◽  
Element Method

scholarly journals Parametric Study on Strength Characteristics of Two-Dimensional Ice Beam Using Discrete Element Method

2021 ◽  
Vol 11 (18) ◽  
pp. 8409
Author(s):  
Seongjin Song ◽  
Wooyoung Jeon ◽  
Sunho Park
Keyword(s):  
Bond Strength ◽  
Discrete Element Method ◽  
Strength Criterion ◽  
Discrete Element ◽  
Strength Characteristics ◽  
Two Dimensional ◽  
Three Point Bending ◽  
Local Parameters ◽  
Compressive Tests ◽  
Element Method

Strength characteristics of a two-dimensional ice beam were studied using a discrete element method (DEM). The DEM solver was implemented by the open-source discrete element method libraries. Three-point bending and uniaxial compressive tests of the ice beam were simulated. The ice beam consisted of an assembly of disk-shaped particles with a particular thickness. The connection of the ice particles was modelled using a cuboid element, which represents a bond. If the stress acting on the bond exceeded the bond strength criterion, the bond started to break, explaining the cracking of the ice beam. To find out the effect of the local parameters of the contact and bond models on the ice fracture, we performed numerical simulations for various bond Young‘s modulus of the particles, the bond strength, and the relative particle size ratio.

Modelling of seismicity-induced cracking of stone columns using discrete-element-method (DEM), a case study of Eufrasius cathedral, Porec, Croatia

2020 ◽  
Author(s):  
Ali Besharatinezhad ◽  
Ákos Török ◽  
Mohammad Al-Tawalbeh ◽  
Miklós Kázmér
Keyword(s):  
Discrete Element Method ◽  
Failure Mechanism ◽  
Failure Process ◽  
Discrete Element ◽  
Three Dimensions ◽  
Stone Columns ◽  
Stone Column ◽  
Lagrangian Analysis ◽  
Fracture Development ◽  
Element Method

<p>The Eufrasius Cathedral of Poreč in Istria Peninsula, Croatia, was built in the 6th century, The nave collapsed in parts due to the AD 1440 earthquake. Nave and aisles are supported by 18 monolithic columns of Proconnesian marble. Seventeen of the columns bear various fractures, forming two groups: (1) axis-parallel fractures and (2) oblique fractures. Azimuths of dip directions of oblique fractures indicate N-S shaking.</p><p>In this study, the fracture development and cracking of a stone column was modelled using computer code. To model the current fracture pattern and to link it to seismic activity a Lagrangian analysis of continua in three dimensions (FLAC3D) is employed to reveal the non-linear behaviour of the stone column. A 3-Dimensional model based on discrete-element-method (DEM) has been created to study the failure process of the ancient stone column under static and dynamic loads. A combination of vertical and horizontal loads with a dynamic load due to the earthquake has been imposed horizontally. The influence of different parameters such as mechanical properties of rock, the magnitude of the earthquake were also assessed to observe their influence on the failure mechanism of rock. The DEM model was able to describe the observed crack pattern and it has proved the applicability of FLAC3D to describe failure mechanism of stone columns.</p>

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