Authors: ChangJu Kim Rhett Mayor Jun Ni
Publish Date: 2012/07/07
Volume: 13, Issue: 8, Pages: 1303-1309
Abstract
This paper reviews the application of the molecular dynamics simulation approach to the highresolution visualization of the plastic material flow at the tool/workpiece interface during orthogonal cutting MD simulation techniques have been applied to nanoscale processes but due to restrictions in the model size and computational time they have not been utilized to investigate processes occurring at the microscale Techniques employed to extend the MD simulation techniques to the microscale are discussed Preferred ranges for model parameters that provide for sufficient resolution in order to adequately describe the characteristic features of the plastic material flow yet achieve significant reduction in the model computational times are identified An investigation of the plastic material flow at the tool/workpiece interface as the uncut chip thickness increases from 10 to 90 of the edge radius of the tool was undertaken A key observation is that there is a marked variation in the geometry of the observed characteristic features most notable being the rotation and growth of the stable builtup edge as the uncut chip thickness increases Furthermore the transition between the plowing and cutting regimes is observed
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