Numerical investigation of the effects of operating parameters in the vibration assisted nano impact machining of single crystalline silicon by loose abrasive using molecular dynamics simulation
“…In some novel machining approaches, Shockly et al investigated the effects of parameters (impact speed, impact angle, and operating temperature) in the vibration-assisted nanoimpact machining on the formation of nanocavity and found that the operating parameters have substantial influence on the depth and width of the generated nanocavities as shown in Fig. 4 [ 61 ]. Xiao et al found the depth and width of groove in the dynamic ploughing process are smaller than those in the static ploughing process, which means that nanostructures with small features could be fabricated through dynamic ploughing lithography.…”
Section: Analysis Of Simulation Resultsmentioning
confidence: 99%
“… Fig. 4 Multiple linear regression plot for a depth of the nanocavity (impact speed, impact angle, and operating temperature) and b width of the nanocavity (impact speed, impact angle, and operating temperature) [ 61 ] …”
Section: Analysis Of Simulation Resultsmentioning
confidence: 99%
“…In this method, the AFM is used as a platform and nanoabrasive are injected in the slurry between the silicon workpiece and the vibration of AFM tip. The kinetic energy for the abrasives is generated by the vibration of the AFM tip and consequently results in nanoscale material removal of the sample [ 61 ]. Schematic representation of the VANILA process is shown in Fig.…”
Tip-based nanomachining (TBN) approaches has proven to be a powerful and feasible technique for fabrication of microstructures. The molecular dynamics (MD) simulation has been widely applied in TBN approach to explore the mechanism which could not be fully revealed by experiments. This paper reviews the recent scientific progress in MD simulation of TBN approach. The establishing methods of the simulation model for various materials are first presented. Then, the analysis of the machining mechanism for TBN approach is discussed, including cutting force analysis, the analysis of material removal, and the defects analysis in subsurface. Finally, current shortcomings and future prospects of the TBN method in MD simulations are given. It is hopeful that this review can provide certain reference for the follow-up research.
“…In some novel machining approaches, Shockly et al investigated the effects of parameters (impact speed, impact angle, and operating temperature) in the vibration-assisted nanoimpact machining on the formation of nanocavity and found that the operating parameters have substantial influence on the depth and width of the generated nanocavities as shown in Fig. 4 [ 61 ]. Xiao et al found the depth and width of groove in the dynamic ploughing process are smaller than those in the static ploughing process, which means that nanostructures with small features could be fabricated through dynamic ploughing lithography.…”
Section: Analysis Of Simulation Resultsmentioning
confidence: 99%
“… Fig. 4 Multiple linear regression plot for a depth of the nanocavity (impact speed, impact angle, and operating temperature) and b width of the nanocavity (impact speed, impact angle, and operating temperature) [ 61 ] …”
Section: Analysis Of Simulation Resultsmentioning
confidence: 99%
“…In this method, the AFM is used as a platform and nanoabrasive are injected in the slurry between the silicon workpiece and the vibration of AFM tip. The kinetic energy for the abrasives is generated by the vibration of the AFM tip and consequently results in nanoscale material removal of the sample [ 61 ]. Schematic representation of the VANILA process is shown in Fig.…”
Tip-based nanomachining (TBN) approaches has proven to be a powerful and feasible technique for fabrication of microstructures. The molecular dynamics (MD) simulation has been widely applied in TBN approach to explore the mechanism which could not be fully revealed by experiments. This paper reviews the recent scientific progress in MD simulation of TBN approach. The establishing methods of the simulation model for various materials are first presented. Then, the analysis of the machining mechanism for TBN approach is discussed, including cutting force analysis, the analysis of material removal, and the defects analysis in subsurface. Finally, current shortcomings and future prospects of the TBN method in MD simulations are given. It is hopeful that this review can provide certain reference for the follow-up research.
“…Record the maximum load during the process of compression failure, and the compressive strength of the material can be calculated according to Eq. (14). At the same time, by recording the deformation of the specimen in the radial and axial process during compression, the Young's modulus and Poisson's ratio of the material can be calculated, as shown in Eq.…”
Section: Compression Testmentioning
confidence: 99%
“…Thanks to the development of computer technology and computing methods, many numerical simulation methods such as finite element method (FEM) [5][6][7], extended finite element method (XFEM) [8], smooth particle hydrodynamics method (SPH) [9][10][11], molecular dynamics (MD) [12][13][14][15] , discrete element method (DEM) [16][17][18][19][20][21] and boundary element method (BEM) [22,23] are used to study the processing damage in hard-brittle materials at different levels of length scales, as shown in Fig. 1.…”
In recent years, the discrete element method (DEM) has been used to model the bulk material, especially for the brittle materials (such as rocks, ceramics, concrete, ice, etc.) with various mechanical properties or responses by setting serials of contact properties (such as bonds) in the particle assembly. These bonds can withstand a certain amount of force and/or moment, so that the stresses executed in the bond can be used for determining the initiation and propagation of micro-crack. There are increasing evidences over the last twenty years that the DEM is becoming an effective numerical method to simulate the cracking, crushing and deformation of continuous media under external loads. The DEM has now been widely used in the field of processing and machining of rock, ceramic, concrete and other brittle materials. In this paper, the theoretical principles, formulations, contact models as well as the numerical solving processes of DEM are introduced. The applications of DEM for the machining processes of brittle and rigid materials such as ceramics are described and reviewed in detail, with future development trend also discussed.
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