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Strain-gradient crystal-plasticity modelling of micro-cutting of b.c.c. single crystal

By Murat Demiral, Anish Roy and Vadim V. Silberschmidt

Abstract

The final publication is available at Springer via http://dx.doi.org/10.1007/s11012-015-0280-3.In recent years thanks to enhancements in design of advanced machines, laser metrology and computer control, ultra-precision machining has become increasingly important. In micromachining of metals the depth of cut is usually less than the average grain size of a polycrystalline aggregate; hence, a cutting process can occur entirely within a single crystal. The respective effect of crystallographic anisotropy requires development of machining models that incorporate crystal plasticity for an accurate prediction of micro-scale material removal under such conditions. To achieve this, a 3D finite-element model of orthogonal micro-cutting of a single crystal of b.c.c. brass was implemented in a commercial software ABAQUS/Explicit using a user-defined subroutine VUMAT. Strain-gradient crystal-plasticity theories were used to demonstrate the influence of evolved strain gradients on the cutting process for different cutting directions

Topics: Strain-gradient crystal-plasticity, Orthogonal micro-cutting, Brass single crystal, Finite-element analysis
Publisher: © Springer
Year: 2016
DOI identifier: 10.1007/s11012-015-0280-3
OAI identifier: oai:dspace.lboro.ac.uk:2134/20560
Journal:

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