Structural Engineering and Mechanics

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The effect of constitutive spins on finite inelastic strain simulations

  • Cho, Han Wook (Institute of Technology, Eng. & Construction Group, Samsung Corporation) ;
  • Dafalias, Yannis F. (Division of Mechanics, National Technical University of Athens, Department of Civil & Environmental Engineering, University of California)
  • Published : 1997.11.25
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Abstract

Within the framework of anisotropic combined viscoplastic hardening formulation, accounting macroscopically for residual stress as well as texture development at finite deformations of metals, simple shear analyses for the simulation of fixed-end torsion experiments for ${\alpha}$-Fe, Al and Cu at different strain rates are reviewed with an emphasis on the role of constitutive spins. Complicated responses of the axial stresses with monotonically increasing shear deformations can be successfully described by the capacity of orthotropic hardening part, featuring tensile axial stresses either smooth or oscillatory. Temperature effect on the responses of axial stresses for Cu is investigated in relation to the distortion and orientation of yield surface. The flexibility of this combined hardening model in the simulation of finite inelastic strains is discussed with reference to the variations of constitutive spins depending upon strain rates and temperatures.

Keywords

References

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