Similarity criteria in the erosion theory of brittle materials in abrasive particle flow

2008 ◽  
Vol 47 (9-10) ◽  
pp. 572-576 ◽  
Author(s):  
G. V. Tkachenko ◽  
B. A. Uryukov
Keyword(s):  
Abrasive Particle ◽  
Brittle Materials ◽  
Similarity Criteria ◽  
Particle Flow

scholarly journals Extremely Thin Metal Foil Blades as Cutting Tools for Hard and Brittle Materials

2018 ◽  
Vol 221 ◽  
pp. 04006
Author(s):  
Satoshi Sakamoto ◽  
Sanshiro Akaoka ◽  
Masaya Gemma ◽  
Yasuo Kondo ◽  
Kenji Yamaguchi ◽  
...  
Keyword(s):  
Particle Size ◽  
Abrasive Particle ◽  
Brittle Materials ◽  
Groove Depth ◽  
Thin Metal ◽  
Metal Foil ◽  
Machining Time ◽  
Blade Thickness ◽  
Hard And Brittle Materials ◽  
Thin Metal Foil

The manufacturing costs of semiconductor products such as silicon wafers can be reduced by decreasing the kerf loss. In addition, a decrease in the kerf loss leads to an effective utilization of rare materials, which is environmentally beneficial from the viewpoint of saving resources. This study aims to reduce the kerf loss during slicing hard and brittle materials. Therefore, the possibility of using an extremely thin metal foil blade instead of a wire tool in slicing was examined. Initially, grooving characteristics using a metal foil blade (thickness: 50 μm or less) was investigated. The main conclusions are that grooving with a metal foil blade is possible and kerf loss can be reduced. The groove depth tends to increase as the machining time and particle size of abrasives increase. The groove width is smaller when a thin metal foil blade is used and vice versa. However, if the abrasive particle size is too large, grooving becomes impossible. Since the wear of metal foil blade increases with an increase in the particle size of the abrasive, it is necessary to use an abrasive with a particle size that is suitable for the thickness of the metal foil blade.

scholarly journals Slicing Ceramics on Material Removed by a Single Abrasive Particle

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4324
Author(s):  
Yao-Yang Tsai ◽  
Ming-Chang Wu ◽  
Yunn-Shiuan Liao ◽  
Chung-Chen Tsao ◽  
Chun-Yao Hsu
Keyword(s):  
Mathematical Model ◽  
Plastic Deformation ◽  
Brittle Fracture ◽  
Material Removal ◽  
Equations Of Motion ◽  
Abrasive Particle ◽  
Brittle Materials ◽  
Machining Parameters ◽  
Wire Saw ◽  
Cutting Model

Multi-wire saw machining (MWSM) used for slicing hard-brittle materials in the semiconductor and photovoltaic industries is an important and efficient material removal process that uses free abrasives. The cutting model of single-wire saw machining (SWSM) is the basis of MWSM. The material removal mechanism of SWSM is more easily understood than MWSM. A mathematical model (includes brittle fracture and plastic deformation) is presented in this paper for SWSM ceramic with abrasives. This paper determines the effect of various machining parameters on the removal of hard-brittle materials. For brittle fracture of SWSM ceramics, the minimum strain energy density is used as a fracture criterion. For plastic deformation of SWSM ceramics, the material removal is calculated using equations of motion. Actual wire-sawing experiments are conducted to verify the results of the developed mathematical model. The theoretical results agree with experimental data and practical experience. From the developed mathematical model, brittle fracture plays a major role in material removal of SWSM ceramics. Wire speed (S) and working load (P) are positively correlated with material removal of SWSM ceramics. The coefficient of friction is low, a lateral crack, which propagates almost parallel to the working surface, leads to more brittle fracture and material removal is increased.

Progress in the Modeling of Abrasive Jet Machining

2010 ◽  
Vol 126-128 ◽  
pp. 3-8 ◽  
Author(s):  
Yasser M. Ali ◽  
Philip Mathew ◽  
Jun Wang
Keyword(s):  
Particle Size ◽  
Continuous Spectrum ◽  
Material Properties ◽  
Recent Progress ◽  
Abrasive Particle ◽  
Brittle Materials ◽  
New Model ◽  
Erosion Processes ◽  
Abrasive Jet Machining ◽  
Erosion Models

Most existing models for abrasive jet machining (AJM) are based on erosion models for either ductile or brittle materials. This classification imposes some limitations, because most materials are neither absolutely ductile nor absolutely brittle, but lay within the continuous spectrum between those two idealizations. This work reports recent progress in the modeling of erosion processes for real materials, and discusses the implications of a new model in estimating the performance of AJM. The new model is more capable in explaining the effects of jet velocity, abrasive particle size, and various material properties on the efficiency of the cutting process.

Similarities and Differences in the Erosion Behavior of Materials

1970 ◽  
Vol 92 (3) ◽  
pp. 619-626 ◽  
Author(s):  
G. L. Sheldon
Keyword(s):  
Particle Velocity ◽  
Material Properties ◽  
Material Removal ◽  
Abrasive Particle ◽  
Brittle Materials ◽  
Rigorous Analysis ◽  
Considerable Similarity ◽  
Ductile Materials ◽  
Erosion Behavior ◽  
Similarities And Differences

A discussion is presented on the behavior of materials during erosion. A rigorous analysis must make an assumption as to the mechanism of material removal, i.e., either ductile or brittle. One expects then, when comparing experimental results, that considerable differences in erosion characteristics will be apparent between these two classes of materials. In this paper it is shown that these differences do exist; however, for certain brittle materials, a considerable similarity to ductile materials exists. This similarity is in the dependence of erosion on abrasive particle velocity and diameter and on the material properties of the eroded surface.

Particle Flow Simulation on Semi-Fixed Abrasive Tool Processing

2011 ◽  
Vol 487 ◽  
pp. 175-179
Author(s):  
Ping Zhao ◽  
Wei Feng Yao ◽  
Q.F. Deng ◽  
Dun Liu ◽  
Ju Long Yuan
Keyword(s):  
Abrasive Particle ◽  
Flow Simulation ◽  
Particle Flow ◽  
Particle Flow Code ◽  
Abrasive Tool ◽  
Tool Surface ◽  
Ultra Precision ◽  
Motion Characteristics ◽  
Fixed Abrasive ◽  
Particle Flow Simulation

The semi-fixed abrasive tool (SFAT) is a new tool used in the ultra-precision machining. Based on the theory of particle flow code (PFC), the abrasive particle motion characteristics of SFAT are studied in SFAT processing which is divided to workpiece pressing progress and workpiece tangential moving progress. It is conclusion that the particles are fallen out the tool surface due to the fracture of bonds under the normal force of workpiece point in the workpiece pressing progress; the particles contacting the workpiece are moved on every hand while some particles fall out the surface at the edge of abrasive tool in the workpiece tangential moving progress, and the maximum value of binding agent holding force is computed.

scholarly journals Theoretical Derivation and A Single Abrasive Particle on Material Removed of Slicing Ceramic

2020 ◽  
Author(s):  
Yao-Yang Tsai ◽  
Ming-Chang Wu ◽  
Yunn-Shiuan Liao ◽  
Chung-Chen Tsao ◽  
Chun-Yao Hsu
Keyword(s):  
Mathematical Model ◽  
Plastic Deformation ◽  
Brittle Fracture ◽  
Material Removal ◽  
Abrasive Particle ◽  
Brittle Materials ◽  
Machining Parameters ◽  
Theoretical Derivation ◽  
Wire Saw ◽  
Cutting Model

Multi-wire saw machining (MWSM) used for slicing hard-brittle materials in semiconductor, is an important material removal process that uses free abrasives. Cutting model of single-wire saw machining (SWSM) is the basis of MWSM, and the material removal mechanism of SWSM can better understand than MWSM. Mathematical model (includes brittle fracture and plastic deformation) is presented in this paper for SWSM ceramic with abrasives. This paper determines the effect of various machining parameters on the removal of hard-brittle materials. For brittle fracture of SWSM ceramics, the minimum of the strain energy density is used as a fracture criterion. The material removed of SWSM ceramics due to plastic deformation is calculated using the equations of motion. Actual wire-sawing experiments are conducted to verify the results from the developed mathematical model. Theoretical results agree with experimental data and practical experience. The developed mathematical model shows that brittle fracture plays a major concern role in material removed of SWSM ceramics. Wire speed and working load have positively correlated with material removed of SWSM ceramics. The coefficient of friction is low, a lateral crack, which propagates almost parallel to the working surface, leads to more brittle fracture and material removed is increased on SWSM ceramics.

Motion Model and Numerical Simulation of Fluid and Abrasive Particle in Near Wall Region

2009 ◽  
Vol 626-627 ◽  
pp. 237-242
Author(s):  
Shi Ming Ji ◽  
J.L. Xu ◽  
Li Zhang ◽  
Ming Sheng Jin ◽  
Y.H. Yang ◽  
...  
Keyword(s):  
Shear Stress ◽  
Turbulent Flow ◽  
Rectangular Channel ◽  
Abrasive Particle ◽  
Particle Flow ◽  
Quantitative Relation ◽  
Work Piece ◽  
Wall Region ◽  
Velocity Attenuation ◽  
Near Wall

The paper discusses the near wall region of soft abrasive particle flow in weak force finish machining method. Turbulent flow morphology in near wall region of rectangular channel with different viscosity is numerically simulated and compared. Through the analysis of kinetic equation of abrasive particle, the abrasive particle motion trace of different diameter in turbulent flow with different viscosity is simulated and compared. The result reveals the condition under which the fluids with different viscosity can form Turbulent flow is different. The greater the viscosity is, the greater the velocity needed is. Also the quantitative relation of velocity and flow volume is available to determine the pump parameter in abrasive particle flow machining. Fluid at wall has pressure and shear stress on work piece. The greater the viscosity and velocity is, the greater the wall pressure and shear stress is. So it is helpful to make material removal on work piece surface. But the greater the viscosity is, the greater the velocity attenuation of abrasive particle is. Abrasive particle mainly move along the flow direction with the movement of fluid. The velocity attenuation of larger diameter abrasive particle is much than the smaller particle but the latter can maintain greater velocity in a longer distance favorable for collision with the work piece surface salient.

Experiment Study on Abrasive Waterjet Machining Mechanisms of Brittle Materials

2008 ◽  
Vol 375-376 ◽  
pp. 62-66
Author(s):  
Hong Tao Zhu ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Quan Lai Li ◽  
Cui Lian Che
Keyword(s):  
Material Removal ◽  
Abrasive Particle ◽  
Brittle Materials ◽  
Target Material ◽  
Abrasive Waterjet ◽  
Clear Understanding ◽  
Experiment Study ◽  
Material Removal Mechanisms ◽  
Abrasive Waterjet Machining ◽  
Removal Mechanisms

The erosion process of abrasive waterjet (AWJ) on target material is very complicated and a complete clear understanding about material removal mechanisms in AWJ machining has not been obtained. In this paper, an experiment study on AWJ machining mechanisms of brittle materials is introduced so as to understand the actions of water jet and abrasive particle in material removal process and some experiment evidences of the change of material removal mechanisms have been obtained.

scholarly journals Statistical model of metal removal removed from product surface under the influence of abrasive particle flow

2020 ◽  
Vol 210 ◽  
pp. 08005
Author(s):  
Georgi Tzordanidi ◽  
Oksana Pyatnitzkaya ◽  
Elena Fisunova ◽  
Tatyana Lavrenova ◽  
Olga Baryshnikova
Keyword(s):  
Statistical Model ◽  
Metal Removal ◽  
Abrasive Particle ◽  
Particle Flow ◽  
Particle Impact ◽  
Metal Volume ◽  
Product Surface ◽  
Plastic Displacement ◽  
Random Nature ◽  
Free Abrasive

A model is proposed that describes the forming processes of metal volume removed from the product surface during processing with a free abrasive flow, taking into account the random nature of abrasive particle impact on the surface and the possibility of implementing acts of elastic and plastic displacement of material or micro-cutting.

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