Investigation of the Subsurface Temperature Effects on Nanocutting Processes via Molecular Dynamics Simulations

Papanikolaou, Michail; Hernández, Francisco Rodríguez; Salonitis, Konstantinos

doi:10.3390/met10091220

Cited by 7 publications

(2 citation statements)

References 45 publications

(45 reference statements)

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“…The temperature analysis module of the visualization software OVITO is adopted to display the cutting heat during the nano machining process [39,40]. The atomic temperature distribution state of the copper-nickel alloy workpiece and the temperature change of the model system are shown in figure 2.…”

Section: Effect Of Tool Rake Angle On Temperature and Cutting Forcementioning

confidence: 99%

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

He,

Gao,

Tang

et al. 2024

Modelling Simul. Mater. Sci. Eng.

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The effects of tool rake angle and cutting depth on cutting temperature, cutting force, friction coefficient of rake tool face, atomic accumulation of chip flow and removal, surface quality, sub-surface damage layer thickness, atomic stress, and dislocation evolution were studied by molecular dynamics simulations. The results showed that the cutting temperature was concentrated on the chip, and the chip was easy to flow out with the increase of the tool rake angle, which weakens the extrusion and shearing action of the workpiece, resulting in the gradual reduction of tangential force. The tool rake angle of 10° is beneficial to improve the surface/subsurface quality of the workpiece. The minimum root-mean-square roughness obtained was 0.73 Å. The atomic stress of the workpiece was mainly concentrated around the area of interaction with the tool, and the atoms on the finished surface underwent elastic recovery, so the atomic stress was not significant. The 1/6<112> (Shockley) dislocation density had always been in the leading position, and 1/6<112> (Shockley) dislocation was continuously synthesized and decomposed during the nano-cutting process. With the increase of cutting depth, the number of atoms removed increases rapidly, and the width of chip side flow increases, but the symmetry is weakened. The contour line map even shows deep wave valleys caused by the absence of atoms, which increases the surface roughness. Moreover, the area and depth of the atomic stress distribution in the subsurface layer increase, and the number of amorphous atoms and dislocation density increase.

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Section: Effect Of Tool Rake Angle On Temperature and Cutting Forcementioning

confidence: 99%

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

He,

Gao,

Tang

et al. 2024

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…At the international level, there is a significant interest in the shape and method of chip formation studied based on mathematical calculations, experiments, and finite element analysis. In this context, authors such as Liu [3] studied tool wear using the finite element method in the milling process, Papanikolaou [4] followed the problem of temperatures using dynamic simulations, He [5] followed the formation of chips in high-speed machining. Vandana [6] researched metal cutting simulation, and Vavruska [7] aimed at reducing processing time by changing spindle speed and feed rate using different milling strategies.…”

Section: Introductionmentioning

confidence: 99%

Study about the chip formation in the turning process using the finite element analysis

Pop

Țîțu

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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At this time, there is a significant interest in the chip shape and formation at the international level, an issue studied based on mathematical calculations, experiments, and finite element analysis. The analysis of the chip formation process showed that the thickness of the undetached chip also varies according to the rake angle of the cutting tool, and using 3D models to analyze the chip formation process demonstrates this fact. Following the research, a study was conducted in which an analysis of the chip morphology is presented. Using Deform 2D application, a finite element simulation - a comparative analysis of the chip formation was performed when the value of the clearance angle varies. The increasing variety of cutting radius values has an influence on the way the chips are formed in terms of thickness, which generate differences in its shape. Following the study, a series of conclusions and own findings emerged that with the increase of the cutting-edge radius, the stress distribution is radial over a greater area of the part, reason for which the deformation of the chip is smaller. Arguments have also been made on distribution of the temperature, which is directly influenced by the shape of the tool, influencing the temperature of the generated chip. The results also show that with the increase of the cutting-edge radius of the tool, there is a tendency for the detached chip to settle.

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Molecular Dynamics Simulations of the Evolution of Residual Stresses During Rapid Solidification of Aluminium

Papanikolaou

Salonitis

Jolly

2021

The Minerals, Metals &Amp; Materials Series

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It is well known that residual stresses are quite common in castings and they emerge due to uneven cooling conditions. Nowadays, the development of atomistic modelling techniques has allowed for the in-depth investigation of the solidification process mechanics as well as the distribution of residual stresses in the simulation domain. In this study we have performed 3-dimensional Molecular Dynamics simulations to investigate the evolution of residual stresses during homogeneous nucleation in pure Aluminium as well as their distribution over the simulation domain. A simulation box containing 1 million of Aluminium atoms placed on the sites of a Face Centred Cubic (FCC) lattice has been melted and subsequently quenched under various cooling rates. The potential energy as well as the formation of grains have been monitored during quenching stages. Moreover, the present analysis is expanded to the distribution of the grain size and the number of grains as a function of the cooling rate. Finally, the obtained results suggest that the cooling rate significantly affects the distribution as well as the final magnitude of residual stresses in the solidified structure.

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Investigation of the Subsurface Temperature Effects on Nanocutting Processes via Molecular Dynamics Simulations

Cited by 7 publications

References 45 publications

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

Study about the chip formation in the turning process using the finite element analysis

Molecular Dynamics Simulations of the Evolution of Residual Stresses During Rapid Solidification of Aluminium

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