A Simplified Model for Orthogonal Micromachining of Fcc Single-crystal Materials
نویسندگان
چکیده
A simplified model for orthogonal micromachining of face-centered cubic (FCC) single-crystal materials is derived in this work. The model uses the basic assumptions and geometrical construction of the Merchant’s model. Bishop and Hill’s micro-plasticity model is used to determine the plastic work done to shear the material along a thin shear plane. The rotation of lattice during the deformation is not considered while calculating the plastic work. The total power was then determined by the sum of the shearing power and friction power. A minimization of this power within the range of geometrically allowable shear angles enabled determination of the shear angle and cutting forces. The model was then compared with the data from the literature. Overall trend of the model was seen to match well with that of the experimental data.
منابع مشابه
Mechanical Micromachining-Effect of Crystallographic Anisotropy on Machining Forces
With increased application of mechanical micromachining for creating small features with complex geometries on a broad range of materials, the need for understanding the mechanics of machining at the micro-scale has been recognized. During mechanical micromachining of metals, the tool-workpiece interaction occurs entirely within either a single crystal or a few crystals of the workpiece materia...
متن کاملاثر آلاییدگی درون وجهی اتم کربن بر طول پیوندها در ساختار بلوری fcc-C60
Single and double equilibrium bond lengths of the fcc-C60 crystal were calculated in the absence and presence of the endohedral C atom as an impurity doped into each C60 cluster, i.e., fcc-C@C60, by means of fully-relaxed self-consistent calculations within the density functtional theory (DFT) employing the full potential-augmented plane waves plus local orbital (FP-APW+lo) method. The result s...
متن کاملMechanical Characteristics and Failure Mechanism of Nano-Single Crystal Aluminum Based on Molecular Dynamics Simulations: Strain Rate and Temperature Effects
Besides experimental methods, numerical simulations bring benefits and great opportunities to characterize and predict mechanical behaviors of materials especially at nanoscale. In this study, a nano-single crystal aluminum (Al) as a typical face centered cubic (FCC) metal was modeled based on molecular dynamics (MD) method and by applying tensile and compressive strain loadings its mechanical ...
متن کاملLight diffraction from colloidal crystals with low dielectric constant modulation: Simulations using single-scattering theory.
We theoretically characterized the diffraction properties of both closed-packed and non-closed-packed crystalline colloidal array (CCA) photonic crystals. A general theory based on single-scattering kinematic approach was developed and used to calculate the diffraction efficiency of CCA of different sphere diameters at different incident light angles. Our theory explicitly relates the scatterin...
متن کاملEFFECT OF SPIRAL DESIGN ON CRYSTAL ORIENTATION DURING SINGLE CRYSTAL GROWTH
Geometrical design of the spiral crystal selector can affect crystal orientation in the final single crystal structure. To achieve a better understanding of conditions associated with the onset of crystal orientation in a spiral crystal selector, temperature field was investigated using three-dimensional finite element method during the process. Different geometries of spiral crystal selec...
متن کامل