The ultraprecision metal cutting(UPMC) technology which makes possible submicrometer form accuracy and nanometer roughness is continuously developed to reach the 1nm nominal (undeformed) thickness of cut. Under this thickness level, a few of atom's layers should be considered and it is impossible to use the conventional two dimensional cutting model or corrected model because of the edge radius of tool and friction at the flank face. On the other hand as the method to solve this problem, the finite element method(FEM) may be suggested, but FEM is impossible for a very small focused region which is around edge of tool and mesh size. As the alternative method, Molecular Dynamics or Statics is suggested and accepted in the field of microcutting, indentation and crack propagation. phenomena of microcutting with subnanometer chip thickness, the cutting mechanism for tool edge configuration, the cut material and cutting speed are evaluated.
As the result of simulation the atomistic chip formation is achieved and cutting mechanism of subnanometer depth of cut is evaluated.
