Contact Force Models for Granular Materials

2020 ◽  
pp. 51-96
Author(s):  
Shunying Ji ◽  
Lu Liu
Keyword(s):  
Granular Materials ◽  
Contact Force

scholarly journals Estimating Contact Force Chains Using Artificial Neural Network

2021 ◽  
Vol 11 (14) ◽  
pp. 6278
Author(s):  
Mengmeng Wu ◽  
Jianfeng Wang
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Particle Size ◽  
Granular Materials ◽  
Coordination Number ◽  
Contact Force ◽  
Force Chains ◽  
Granular System ◽  
Biaxial Test ◽  
Artificial Neural

The inhomogeneous distribution of contact force chains (CFC) in quasi-statically sheared granular materials dominates their bulk mechanical properties. Although previous micromechanical investigations have gained significant insights into the statistical and spatial distribution of CFC, they still lack the capacity to quantitatively estimate CFC evolution in a sheared granular system. In this paper, an artificial neural network (ANN) based on discrete element method (DEM) simulation data is developed and applied to predict the anisotropy of CFC in an assembly of spherical grains undergoing a biaxial test. Five particle-scale features including particle size, coordination number, x- and y-velocity (i.e., x and y-components of the particle velocity), and spin, which all contain predictive information about the CFC, are used to establish the ANN. The results of the model prediction show that the combined features of particle size and coordination number have a dominating influence on the CFC’s estimation. An excellent model performance manifested in a close match between the rose diagrams of the CFC from the ANN predictions and DEM simulations is obtained with a mean accuracy of about 0.85. This study has shown that machine learning is a promising tool for studying the complex mechanical behaviors of granular materials.

Contact Force Distribution and Induced Anisotropy in Granular Materials under Biaxial Test

2012 ◽  
Vol 446-449 ◽  
pp. 1927-1934
Author(s):  
Min Yun Hu ◽  
Qiao Hao Chen ◽  
Ying Shen ◽  
Xiao Wu Tang
Keyword(s):  
Granular Materials ◽  
Contact Force ◽  
Force Distribution ◽  
Biaxial Test ◽  
Induced Anisotropy ◽  
Contact Force Distribution

Contact force measurements and stress-induced anisotropy in granular materials

Nature ◽  
2005 ◽  
Vol 435 (7045) ◽  
pp. 1079-1082 ◽  
Author(s):  
T. S. Majmudar ◽  
R. P. Behringer
Keyword(s):  
Granular Materials ◽  
Contact Force ◽  
Force Measurements ◽  
Induced Anisotropy ◽  
Stress Induced Anisotropy

scholarly journals Tail of the contact force distribution in static granular materials

2007 ◽  
Vol 75 (6) ◽  
Author(s):  
Adrianne R. T. van Eerd ◽  
Wouter G. Ellenbroek ◽  
Martin van Hecke ◽  
Jacco H. Snoeijer ◽  
Thijs J. H. Vlugt
Keyword(s):  
Granular Materials ◽  
Contact Force ◽  
Force Distribution ◽  
Contact Force Distribution

Dissipation in granular materials

1998 ◽  
Vol 77 (5) ◽  
pp. 1413-1425 ◽  
Author(s):  
Dietrich E.Wolf, Farhang Radjai, Sabine Dipp
Keyword(s):  
Granular Materials
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