Movement patterns of ellipsoidal particle in abrasive flow machining

Fang, Liang; Jing, Zhao; Li, Bo; Sun, Kun

doi:10.1016/j.jmatprotec.2009.08.013

Cited by 32 publications

(28 citation statements)

References 19 publications

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“…The movement pattern of abrasive particle is a very important factor in estimating the materials' wear characteristics [18]. To measure the movement pattern of ellipsoidal particle, we expressed the atomic instantaneous configurations, as shown in Figure 2, and the semi-major axis was marked with a white dash line.…”

Section: Movement Pattern Of Abrasive Particlementioning

confidence: 99%

“…Anantheshwara et al [11] stressed the dependence of particle movement pattern, including sliding, rolling, and their combinations occurring, on the particle geometry in nanoscale three-body abrasion. Fang et al [18] assumed an ellipsoidal particle as the first approximation to model real particle contours in three-body abrasion. In addition, much effort has been paid for the abrasion properties of monocrystalline silicon at nanoscale by the molecular dynamics (MD) simulation [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Abrasive Shape on the Abrasion and Phase Transformation of Monocrystalline Silicon

et al. 2018

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Abstract:The effect of abrasive shape on the three-body abrasion behaviors of monocrystalline silicon was investigated via molecular dynamics. The axial ratio of abrasive particle varied from 1.00 to 0.40 to mimic abrasive shape. It has been observed that the particle's movement became sliding instead of rolling when the axial ratio was smaller than a critical value 0.46. In the abrasion process, the friction force and normal force showed an approximately sinusoid-like fluctuation for the rolling ellipsoidal particles, while the front cutting of particle caused that friction force increased and became larger than normal force for sliding particles. The phase transformation process was tracked under different particle' movement patterns. The Si-II and Bct5 phase producing in loading process can partially transform to Si-III/Si-XII phase, and backtrack to original crystal silicon under pressure release, which also occurred in the abrasion process. The secondary phase transformation showed difference for particles' rolling and sliding movements after three-body abrasion. The rolling of particle induced the periodical and inhomogeneous deformation of substrates, while the sliding benefited producing high-quality surface in chemical mechanical polishing (CMP) process. This study aimed to construct a more precise model to understand the wear mechanism benefits evaluating the micro-electro-mechanical systems (MEMS) wear and CMP process of crystal materials.

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Section: Movement Pattern Of Abrasive Particlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Abrasive Shape on the Abrasion and Phase Transformation of Monocrystalline Silicon

et al. 2018

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“…Variable diameter pipe parts in the food, pharmaceutical, automotive, military and other industrial production and daily life has a very wide range of applications, the use of high-pressure tubing, intake and exhaust manifolds, saxophone and other pipe instruments used in various vehicles such as pacemaker catheters, drug delivery pipes, automobiles, tanks and other devices on medical equipment has become an industrial production an indispensable part of manufacturing [1][2][3]. So variable diameter parts of the internal surface quality directly affect the performance of the entire system, practical applications require variable diameter pipe parts inside the surface smooth and no burrs, conventional processing methods are less difficult to achieve the desired surface accuracy, grinding grain flow polishing technology, successfully solved this problem [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation analysis of four-step variable-diameter pipe by solid-liquid two-phase grinding

Li¹,

Hu²,

Meng³

et al. 2017

Vib. proced.

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In order to investigate the effect of abrasive flow on the polishing effect of variable diameter pipe parts, taking the fourth-order variable-diameter pipe part as the research object, the solid-liquid two-phase abrasive grains are used as the processing method of the fourth-order variable-diameter pipe, the numerical simulation of the machining process of the four-order variable-diameter pipe parts were carried out. Analysis of different inlet speed conditions, the dynamic pressure and the distribution of turbulence intensity of the flow field of the fourth order variable diameter pipe. Through comparative analysis, the effects of the four-stage variable-diameter pipe flow field are studied, which can provide the theoretical basis for the continuous improvement of the abrasive flow precision and ultra precision machining technology, which can improve the efficiency of abrasive flow processing, so that the workpiece fatigue strength is improved, enhance the reliability of the workpiece, extend the service life of the workpiece.

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“…Random surface effects due to bombing cycles are a result of the quality of the machine's performance. However, the connection between the effects and the particular operations is missing in [5]. Paper [6] utilizes a risk function to consider the example of solar rays hitting a surface as a random process.…”

Section: Introductionmentioning

confidence: 99%

“…They bombard a surface with spherical beads to increase the material fatigue strength. The physical modelling of the influence of the bead shapes on the performance of the surface hardening process is presented in [5]. Random surface effects due to bombing cycles are a result of the quality of the machine's performance.…”

mentioning

confidence: 99%

Deterministic Mathematical Modelling of Platform Performance Degradation in Cyclic Operation Regimes

Kapor¹,

Milinović²,

Jeremić³

et al. 2015

SV-JME

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Machines operating in cycles and their properties have not been studied in depth in literature and, as such, are not well described by integral mathematical models. If the effects of their operation are actions on the given working surfaces under given constraints, then the quality of the affected surfaces can be described by reliability functions. In this manner, the operating capabilities of the platform can be determined. A majority of the published papers use a standard approach to the measured performances that depend on the machine's designed purposes. Such processes are described in [1] to [3] for the abrasive flow machines (AFM) with which material is hardened by randomly treating the working surface with abrasive particles with polymeric fillers, and dispersed within the flow media. The authors of [1] classified the work piece parameters into three groups based, among others, on the number of cycles (operations) and the machining time. Some of these parameters were determined experimentally in [2], in which the authors recognized that the parameters denoted as the creeping time and the cycles frequency have impact on the quality of the machining process. In [3], the authors experimentally prove that the aforementioned parameters influence the process. Common for all three papers is that they do not include hidden random effects caused by particles affecting the surfaces in cyclic operations, although such effects significantly influence the quality of the surface treatment. In all three papers, there is no mathematical modelling of the process.Another similar type of machine with cyclic operation affecting working surfaces is described in [4] as shot-peening (SP) platforms. They bombard a surface with spherical beads to increase the material fatigue strength. The physical modelling of the influence of the bead shapes on the performance of the surface hardening process is presented in [5]. Random surface effects due to bombing cycles are a result of the quality of the machine's performance. However, the connection between the effects and the particular operations is missing in • Proposed methodology for performances degradation caused by operations composed in cycles.• Using Gaussian probability distribution law to predict degradation measures.• Predicting the changes of probability dispersion based on modelling and experimental data.• Determination of an analytical model based on a hypothesis that the degrading effects are a function of the platform capacity, frequency of operations and the number of available cycles.

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Movement patterns of ellipsoidal particle in abrasive flow machining

Cited by 32 publications

References 19 publications

Influence of Abrasive Shape on the Abrasion and Phase Transformation of Monocrystalline Silicon

Influence of Abrasive Shape on the Abrasion and Phase Transformation of Monocrystalline Silicon

Numerical simulation analysis of four-step variable-diameter pipe by solid-liquid two-phase grinding

Deterministic Mathematical Modelling of Platform Performance Degradation in Cyclic Operation Regimes

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