As. Khan et Rq. Liang, Behaviors of three BCC metals during non-proportional multi-axial loadings: experiments and modeling, INT J PLAST, 16(12), 2000, pp. 1443-1458
Non-proportional torsion-tension and biaxial-compressive experimental resul
ts are presented on tantalum, tantalum alloy with 2.5% tungsten, and AerMet
100 steel. These test results form a comprehensive set of data to show the
material behaviors at finite strain and wide strain-rate range. Using the
parameter set determined from uniaxial constant strain-rate compressive and
tensile tests, the capability of a new constitutive model (Khan, A.S., Lia
ng, R., 1999. Behaviors of three BCC metal over a wide range of strain rate
s and temperatures: experiments and modeling. International Journal of Plas
ticity 15, 1089-1109) is shown to accurately predict complex loading paths
of current experimental results. Using von Mises equivalent strain, stress,
and strain rate, the constitutive model gives excellent predictions of the
se non-proportional experimental results. (C) 2000 Elsevier Science Ltd. Al
l rights reserved.