Micromechanical and microstructure analysis of asphalt concrete under triaxial load condition based on Discrete Element Method

2014 ◽  
pp. 1761-1773
Author(s):  
Jun Yang ◽  
Keli Wang ◽  
Qing Lu ◽  
Jiantong Zhang ◽  
Haopeng Wang
Keyword(s):  
Discrete Element Method ◽  
Asphalt Concrete ◽  
Load Condition ◽  
Discrete Element ◽  
Microstructure Analysis ◽  
Element Method

Modeling of Asphalt Concrete Fracture Tests with the Discrete-Element Method

2020 ◽  
Vol 32 (8) ◽  
pp. 04020228 ◽  
Author(s):  
Juliana Meza-Lopez ◽  
Nilthson Noreña ◽  
Carlos Meza ◽  
Celso Romanel
Keyword(s):  
Discrete Element Method ◽  
Asphalt Concrete ◽  
Discrete Element ◽  
Concrete Fracture ◽  
Fracture Tests ◽  
Element Method

Rate-dependent fracture modeling of asphalt concrete using the discrete element method

2009 ◽  
Vol 36 (2) ◽  
pp. 320-330 ◽  
Author(s):  
Hyunwook Kim ◽  
Michael P. Wagoner ◽  
William G. Buttlar
Keyword(s):  
Discrete Element Method ◽  
Asphalt Concrete ◽  
Cohesive Zone Model ◽  
Discrete Element ◽  
Fracture Mechanisms ◽  
Zone Model ◽  
Rate Dependency ◽  
Heterogeneous Model ◽  
Rate Dependent ◽  
Element Method

The discrete element method (DEM) represents a convenient and powerful tool for studying effects of material microstructure on fracture mechanisms in asphalt concrete. In this paper, the rate-dependency of asphalt concrete is investigated using a cohesive zone model with bulk viscoelastic properties combined with bilinear post-peak softening. Details of the constitutive models implemented in the DEM, with particular emphasis on the verification of viscoelastic models, are presented. Experimental test results based on a disk-shaped compact tension test are obtained under different loading rates and those are compared to numerical simulations with the help of the rate-dependent model. Homogeneous and heterogeneous model results are compared, where heterogeneous models are constructed to consider aggregate morphology for particles larger than 1.18 mm. The relative importance of time-dependence and the consideration of material heterogeneity in the simulation of monotonic Mode I fracture tests are demonstrated.

scholarly journals Mechanical analysis and research of the conveyor belt of plane turning belt conveyor based on Discrete Element Method

2017 ◽  
Vol 41 (1) ◽  
pp. 55-62
Author(s):  
De-yong Li ◽  
Shuang Wang ◽  
Kun Hu
Keyword(s):  
Discrete Element Method ◽  
Inclination Angle ◽  
Turning Point ◽  
Elevation Angle ◽  
Load Condition ◽  
Discrete Element ◽  
Conveyor Belt ◽  
Design Parameters ◽  
Belt Conveyor ◽  
Element Method

In view of the size and the change of the load force of the conveyor belt at the turning point of the plane turning belt conveyor, the influencing factors of the stress of the conveyor belt at the turning point of the plane turning belt conveyor under full load condition are analyzed. A three dimensional model of the turning point of the plane turning belt conveyor is established. Combined with previous research experience, the formula for calculating the load is put forward. Based on discrete element method, multiple sets of internal curve elevation angle and the belt speed are used for dynamic simulation analysis. The results showed that the middle of conveyor belt is the most stressed, the lateral force second, the force of the inner conveyor belt is the least. Outside force increases with the increase of speed; there is no change in the middle band; the inner band force decreases with the increase of the velocity. Outside force decreases with the decrease of the inclination angle. With the change of the inclination angle, the force is basically unchanged. With the decreasing of the inclination angle, the force increases gradually. By optimizing the design parameters of the plane turning belt conveyor, the force of belt is reduced, and the service life of belt is improved.

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