A simple elastoplastic strainhardening model of soil and soft rock behaviour is presented. The physical meaning of the few constitutive parameters characterizing the constitutive law is discussed and the procedure for their determination is outlined. Typical ...

The paper presents the historical development of fundamental concepts related to the modelling of the non-linear and irreversible behaviour of soils. The concepts of failure, flow rule, successive yield surfaces and hardening rules are recalled. The original ...