The approach to plasticity theory developed here is firmly rooted in
thermodynamics. Emphasis is placed on the use of potentials and the
derivation of incremental response, necessary for numerical analysis.
The derivation of constitutive models for irreversible behaviour
entirely from two scalar potentials is shown.
The use of potentials allows models to be very simply defined,
classified and, if necessary, developed and it permits dependent and
independent variables to be interchanged, making possible different
forms of a model for different applications.
The theory is extended to include treatment of rate-dependent materials
and a powerful concept, in which a single plastic strain is replaced by
a plastic strain function, allowing smooth transitions between elastic
and plastic behaviour is introduced.
This monograph will benefit academic researchers in mechanics, civil
engineering and geomechanics and practising geotechnical engineers; it
will also interest numerical analysts in engineering mechanics.