Influence of processing parameters on grinding mechanism in planetary mill by employing discrete element method

2012 ◽  
Vol 23 (6) ◽  
pp. 708-716 ◽  
Author(s):  
Hossein Ashrafizadeh ◽  
Mahmud Ashrafizaadeh
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Processing Parameters ◽  
Planetary Mill ◽  
Grinding Mechanism ◽  
Element Method

Simulation of Ceramic Grinding Mechanism Based on Discrete Element Method

2019 ◽  
Vol 16 (04) ◽  
pp. 1843008 ◽  
Author(s):  
Yuanqiang Tan ◽  
Cong Zhang ◽  
Shengqiang Jiang ◽  
Y. T. Feng
Keyword(s):  
Discrete Element Method ◽  
Indentation Test ◽  
Discrete Element ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Initiation And Propagation ◽  
Grinding Mechanism ◽  
Ceramic Grinding ◽  
Cutting Model ◽  
Element Method

The grinding mechanism is the base of developing new precision machining technology, especially for brittle materials including ceramics. In previous work, many results were gained from single grit cutting model in which a grit is in contact continuously with a workpiece, similar to the indentation or scratching process, to model the material remove in grinding processing. However, the abrasives are distributed randomly on the surface of the grinding wheel, and they will impact the workpiece periodically in the grinding process. In this study, the discrete element method was introduced to simulate the mechanics behavior of [Formula: see text] ceramic. The model was validated by simulating indentation test. Both linear scratching test and pendulum scratching test have been simulated in this paper to model the grinding process. The cracks initiation and propagation were also investigated. This study has demonstrated that we should pay close attention to pendulum scratching test to explore the grinding mechanism, and concentrate on cracks initiation and propagation.

Discrete element method to model cracking for two layer systems

TAPPI Journal ◽  
2019 ◽  
Vol 18 (2) ◽  
pp. 101-108
Author(s):  
Daniel Varney ◽  
Douglas Bousfield
Keyword(s):  
Discrete Element Method ◽  
Flexural Modulus ◽  
Single Layer ◽  
Discrete Element ◽  
Flexural Stress ◽  
Layer System ◽  
Three Point Bending ◽  
Moving Force ◽  
Coating Layers ◽  
Element Method

Cracking at the fold is a serious issue for many grades of coated paper and coated board. Some recent work has suggested methods to minimize this problem by using two or more coating layers of different properties. A discrete element method (DEM) has been used to model deformation events for single layer coating systems such as in-plain and out-of-plain tension, three-point bending, and a novel moving force picking simulation, but nothing has been reported related to multiple coating layers. In this paper, a DEM model has been expanded to predict the three-point bending response of a two-layer system. The main factors evaluated include the use of different binder systems in each layer and the ratio of the bottom and top layer weights. As in the past, the properties of the binder and the binder concentration are input parameters. The model can predict crack formation that is a function of these two sets of factors. In addition, the model can predict the flexural modulus, the maximum flexural stress, and the strain-at-failure. The predictions are qualitatively compared with experimental results reported in the literature.

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