Efficient generation of densely packed convex polyhedra for 3D discrete and finite-discrete element methods

2013 ◽  
Vol 94 (1) ◽  
pp. 1-19 ◽  
Author(s):  
S.R. Buechler ◽  
S.M. Johnson
Keyword(s):  
Discrete Element ◽  
Convex Polyhedra ◽  
Efficient Generation ◽  
Discrete Element Methods

scholarly journals SIMULATION OF FRACTURE USING A MESH-DEPENDENT FRACTURE CRITERION IN THE DISCRETE ELEMENT METHOD

2018 ◽  
Vol 16 (1) ◽  
pp. 41 ◽  
Author(s):  
Andrey Dimaki ◽  
Evgeny Shilko ◽  
Sergey Psakhie ◽  
Valentin Popov
Keyword(s):  
Particle Size ◽  
Discrete Element Method ◽  
Mechanical Behavior ◽  
Fracture Criterion ◽  
Discrete Element ◽  
Macroscopic Behavior ◽  
Detachment Criterion ◽  
Discrete Element Methods ◽  
Adhesive Contacts ◽  
Fracture Processes

Recently, Pohrt and Popov have shown that for simulation of adhesive contacts a mesh dependent detachment criterion must be used to obtain the mesh-independent macroscopic behavior of the system. The same principle should be also applicable for the simulation of fracture processes in any method using finite discretization. In particular, in the Discrete Element Methods (DEM) the detachment criterion of particles should depend on the particle size. In the present paper, we analyze how the mesh dependent detachment criterion has to be introduced to guarantee the macroscopic invariance of mechanical behavior of a material. We find that it is possible to formulate the criterion which describes fracture both in tensile and shear experiments correctly.

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