Dn. Robinson et Wk. Binienda, Model of viscoplasticity for transversely isotropic inelastically compressible solids, J ENG MEC, 127(6), 2001, pp. 567-573
A transversely isotropic, viscoplasticity model is formulated as an extensi
on of Bodner's model. Account is made of inelastic deformation that can occ
ur in strongly anisotropic materials under hydrostatic stress. The extended
model retains the simplicity of the Bodner model, particularly in the ease
with which the material constants are determined. Although the proposed mo
del is based on a scalar state variable, it is capable of representing mate
rial anisotropy under the assertion that history-induced anisotropy can be
ignored relative to strong initial anisotropy. physical limitations on the
material parameters are identified and discussed. The model is applied to a
W/Cu metal matrix composite; characterization is made using off-axis tensi
le data generated at NASA Glenn Research Center.