Abstract
Axisymmetric tension and compression tests were simulated using the rigid-viscoplastic finite element analysis code ALPID 2.1. The tension test simulations were run for strain rate sensitivity parameters in the range of 0.2–1.1. The compression test simulations were run for 0.2, 0.4, and 0.8 strain rate sensitivity parameters and for 0.0, 0.001, 0.150, and 0.800 friction factors. Variations of the stress ratiog (mean stress/effective stress) in combination with the strain rate and with respect to time have been studied. The rate of change of the square of theg parameter with respect to the log of the strain rate allows a useful description of the material workability within the simulated test specimens during the deformation processes.
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Chen, HL., Lehnhoff, T.F. & Doraivelu, S.M. A stress ratio parameter for studying the workability of metals—Tension and compression. J. Materials Shaping Technology 8, 111–122 (1990). https://doi.org/10.1007/BF02833623
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DOI: https://doi.org/10.1007/BF02833623