Metal cutting simulation of 4340 steel using an accurate mechanical description of meterial strength and fracture

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Strength and fracture constitutive relationships containing strain rate dependence and thermal softening are important for accurate simulation of metal cutting. The mechanical behavior of a hardened 4340 steel was characterized using the von Mises yield function, the Mechanical Threshold Stress model and the Johnson- Cook fracture model. This constitutive description was implemented into the explicit Lagrangian FEM continuum-mechanics code EPIC, and orthogonal plane-strain metal cutting calculations were performed. Heat conduction and friction at the toolwork-piece interface were included in the simulations. These transient calculations were advanced in time until steady state machining behavior (force) was realized. Experimental cutting force data ... continued below

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15 p.

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Maudlin, P.J. & Stout, M.G. September 1, 1996.

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Description

Strength and fracture constitutive relationships containing strain rate dependence and thermal softening are important for accurate simulation of metal cutting. The mechanical behavior of a hardened 4340 steel was characterized using the von Mises yield function, the Mechanical Threshold Stress model and the Johnson- Cook fracture model. This constitutive description was implemented into the explicit Lagrangian FEM continuum-mechanics code EPIC, and orthogonal plane-strain metal cutting calculations were performed. Heat conduction and friction at the toolwork-piece interface were included in the simulations. These transient calculations were advanced in time until steady state machining behavior (force) was realized. Experimental cutting force data (cutting and thrust forces) were measured for a planning operation and compared to the calculations. 13 refs., 6 figs.

Physical Description

15 p.

Notes

OSTI as DE96013984

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  • American Society of Mechanical Engineers (ASME) and Metals materials week, Cincinnati, OH (United States), 6-10 Oct 1996

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  • Other: DE96013984
  • Report No.: LA-UR--96-2295
  • Report No.: CONF-961017--2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 376398
  • Archival Resource Key: ark:/67531/metadc680908

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  • September 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 29, 2016, 4:12 p.m.

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Maudlin, P.J. & Stout, M.G. Metal cutting simulation of 4340 steel using an accurate mechanical description of meterial strength and fracture, article, September 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc680908/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.