  The proposed work is a formulation for large-strain non-isochoric plastic
deformation, using the GTN yield function as the void growth rule as an
example. This formulation is fully hyperelastic and uses the Kroner-Lee
multiplicative decomposition. It adopts the concept of elastic correctors, and
thus, does not have any constraints on the amount of elastic strain or the form
of elasto-plastic behaviours. In addition, the volumetric part of the plastic
deformation is described with the corrector of the volumetric part of the
elastic logarithmic strain. It offers a new and sound kinematic approach to
deal with non-isochoric plasticity. We also use the GTN function as an example
to demonstrate the use of the kinematic relation as well as the implementation
of the implicit algorithm.
