Abstract
Ultrasonic assisted turning (UAT) is a novel manufacturing technology, where high frequency vibrations are imposed on the movement of a cutting tool. A 2D FE transient simulation is developed in DEFORM, where ultrasonic vibrations of frequency 20 kHz and amplitude of 20 μm are provided to the cutting tool in the direction of cutting velocity. The prediction of residual stress distribution is carried out using elasto-plastic finite element simulations. Experimental analysis is carried out in measuring the strain at the cutting tool during CT and UAT along with the chip mechanism and chip microstructure study to validate the residual stress distribution. The ultrasonic vibrations yield a considerable improvement in compressive residual stresses which ultimately benefits in improving fatigue life of titanium alloys.
Publisher
Trans Tech Publications, Ltd.
Reference11 articles.
1. T. Ozel et al., Prediction of machining induced residual stresses in turning of titanium and nickel based alloys with experiments and finite element simulation, CIRP Annals – Manufacturing Technology 2012, 61, 547-550.
2. R. Muhammad et al., Computational Study of Ultrasonically-Assisted Turning of Ti alloys, Int. J. Advanced Materials Research, 2011, 22, 330-336.
3. V. I. Babitsky et al., Ultrasonically assisted turning of aviation materials: simulations and experimental study, Int. J. Ultrasonic, 2009, 42, 81-86.
4. N. Ahmed et al., Stresses in Ultrasonically-Assisted Turning, Int. J. Applied Mechanics and Materials, 2006, 5-6, 351-358.
5. V. I. Babitsky et al., Ultrasonically assisted turning of aviation materials, Int. J. Materials Processing Technology, 2003, 132, 157-167.