ABSTRACT
One of the main goals of constitutive modeling is its ultimate application in the analysis of practical geotechnical engineering problems with a high degree of confidence. On the other hand, most practical designs of earth structures, foundations, and countermeasures against earth disasters, among others, are based on elastic theory and/or rigid plastic theory, in which the deformation characteristics of geomaterials described in Part 1 are not considered. Following the development of the Cam clay model, nonlinear elastoplastic analyses have been carried out to solve boundary value problems. However, applications to practical design have been limited because most of the constitutive models used in the previous analysis cannot describe the soil behaviors comprehensively.
