J. Phys. IV France 01 (1991) C3-909-C3-916
THE CONSTITUTIVE MODELING OF POROUS METALS AT HIGH RATES OF DEFORMATIONM. da SILVA and K. T. RAMESH
Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD 21218, U.S.A
The constitutive behavior of fully dense and porous Ti-6Al-4V at high rates of deformation is investigated using a Kolsky compression bar : stress-strain curves are obtained for homogeneous compressive deformations at strain rates between 102-104s-1. In addition to the high rate testing, the behavior of the fully dense and porous materials in quasistatic compression is obtained. The porous metal does show a higher degree of strain hardening at both low and high rates due to the compressibility of the pores.
© EDP Sciences 1991