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An explicit finite element model to study the influence of rake angle and friction during orthogonal metal cutting

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Abstract

A fundamental understanding of the tribology aspects of machining processes is essential for increasing the dimensional accuracy and surface integrity of finished products. To this end, the present investigation simulates an orthogonal metal cutting using an explicit finite element code, LS-DYNA. In the simulations, a rigid cutting tool of variable rake angle was moved at different velocities against an aluminum workpiece. A damage material model was utilized for the workpiece to capture the chip separation behavior and the simultaneous breakage of the chip into multiple fragments. The friction factor at the cutting tool–workpiece interface was varied through a contact model to predict cutting forces and dynamic chip formation. Overall, the results showed that the explicit finite element is a powerful tool for simulating metal cutting and discontinuous chip formation. The separation of the chip from the workpiece was accurately predicted. Numerical results found that rake angle and friction factor have a significantly influence on the discontinuous chip formation process, chip morphology, chip size, and cutting forces when compared to the cutting velocity during metal cutting. The model was validated against the experimental and numerical results obtained in the literature, and a good agreement with the current numerical results was found.

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Authors and Affiliations

  1. Department of Industrial Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, 53201, USA

    Pradeep L. Menezes & Michael R. Lovell

  2. Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI, 53201, USA

    Ilya V. Avdeev

  3. Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA

    C. Fred Higgs III

Authors
  1. Pradeep L. Menezes
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  2. Ilya V. Avdeev
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  3. Michael R. Lovell
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  4. C. Fred Higgs III
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Correspondence to Pradeep L. Menezes.

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Menezes, P.L., Avdeev, I.V., Lovell, M.R. et al. An explicit finite element model to study the influence of rake angle and friction during orthogonal metal cutting. Int J Adv Manuf Technol 73, 875–885 (2014). https://doi.org/10.1007/s00170-014-5877-5

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  • DOI: https://doi.org/10.1007/s00170-014-5877-5

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