... springs the analytical formulas are necessary. In this paper the analytical solution of the problem of elastic–plastic deformation of cylindrical bar under combined bending and torsion moments is found for a special nonlinear stress–strain law. The obtained solution allows the analysis of the active...

... and a small accelerometer was conducted on one of the macro-drills. In the validation study, five macro-drills and three micro-drills with different geometric parameters are used. It was concluded that the 3D-ST model can capture both bending and torsional-axial natural frequencies and mode shapes of macro...

.... Finite Element Models were created to analyze the effects of varying toolholder and spindle taper geometry, axial spindle taper length, drawbar/clamping load, spindle speed, applied bending load, and applied torsional load on HSK toolholders. Outputs considered include taper-to-taper contact pressures...

...Philip V. Bayly; Sandra A. Metzler; Adam J. Schaut; Keith A. Young The mechanism of torsional chatter in drilling differs qualitatively and quantitatively from other types of chatter. In this paper we show that torsional chatter can be explained by the torsional-axial coupling inherent in a twisted...