scholarly journals Identification of the Discrete Element Model Parameters for Rock-Like Brittle Materials

2020 ◽  
Vol 123 (2) ◽  
pp. 717-737 ◽  
Author(s):  
Rui Chen ◽  
Yong Wang ◽  
Ruitao Peng ◽  
Shengqiang Jiang ◽  
Congfang Hu and Ziheng Zhao
Keyword(s):  
Brittle Materials ◽  
Element Model ◽  
Discrete Element ◽  
Model Parameters ◽  
Discrete Element Model

Calibration of discrete element model parameters: soybeans

2018 ◽  
Vol 6 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Bhupendra M Ghodki ◽  
Manish Patel ◽  
Rohit Namdeo ◽  
Gopal Carpenter
Keyword(s):  
Element Model ◽  
Discrete Element ◽  
Model Parameters ◽  
Discrete Element Model

Determination of discrete element model parameters for a cohesive soil and validation through narrow point opener performance analysis

2021 ◽  
Vol 213 ◽  
pp. 105123 ◽  
Author(s):  
Kojo Atta Aikins ◽  
Mustafa Ucgul ◽  
James B. Barr ◽  
Troy A. Jensen ◽  
Diogenes L. Antille ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Cohesive Soil ◽  
Element Model ◽  
Discrete Element ◽  
Model Parameters ◽  
Discrete Element Model

A calibration framework for discrete element model parameters using genetic algorithms

2018 ◽  
Vol 29 (6) ◽  
pp. 1393-1403 ◽  
Author(s):  
Huy Q. Do ◽  
Alejandro M. Aragón ◽  
Dingena L. Schott
Keyword(s):  
Genetic Algorithms ◽  
Element Model ◽  
Discrete Element ◽  
Model Parameters ◽  
Discrete Element Model

scholarly journals Scaling of discrete element model parameters for cohesionless and cohesive solid

2016 ◽  
Vol 293 ◽  
pp. 130-137 ◽  
Author(s):  
Subhash C. Thakur ◽  
Jin Y. Ooi ◽  
Hossein Ahmadian
Keyword(s):  
Element Model ◽  
Discrete Element ◽  
Model Parameters ◽  
Discrete Element Model

scholarly journals A Discrete Element Model for Damage and Fatigue Crack Growth of Quasi-Brittle Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Xiaofeng Gao ◽  
Georg Koval ◽  
Cyrille Chazallon
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Damage Model ◽  
Brittle Materials ◽  
Element Model ◽  
Discrete Element ◽  
Discrete Element Model ◽  
Single Model ◽  
Stress Intensity Range

The repeatedly applied low-intensity loads would lead to the damage and fatigue crack growth of mechanical structures made of quasi-brittle materials. In numerical modelling, these two mechanisms are normally treated differently and separately; the damage is usually associated with nonlocal approaches, while the fatigue crack growth is related to the local stress intensity range at the crack tip. In this study, a discrete element model for damage and fatigue crack growth of quasi-brittle materials is proposed, which is able to model the damage and fatigue crack growth simultaneously in one single model. The proposed model achieves the implementation of a continuum damage model in a discrete element code, which is a helpful enrichment of this numerical method. The evaluation method of the stress intensity range during the damage evolution provides a way to couple both failure mechanisms. This feature allows crack initiation to be induced by localized damage and a progressive transition to a fracture behaviour with the crack propagation. Independent parameters for the fatigue damage model and fatigue crack growth model are admitted without any previous calibration. The numerical results are in good agreement with the theoretical predictions of damage and fracture mechanics, and intact and precracked samples are analysed under fatigue loading to show the consistent coexistence of fractured and damaged zones in a single model.

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