دانلود گزارش کارورزی و کار آموزی

چکیده : 

In this paper a viscoplastic constitutive model for unsaturated geomaterials is presented. The constitutive

laws for the description of the time-dependent mechanical behaviour of saturated and unsaturated

geomaterials generalise the isotach approach proposed by Šuklje [52] to the elastoplastic strain hardening

based constitutive laws for unsaturated soils. The formulation encompasses strain rate effects and

allows the description of the coupled effect of strain rate and suction on the viscoplastic behaviour of

geomaterials. The model has been used to simulate tests involving variable stress and/or strain rate conditions,

including creep phases and soaking tests. Numerical results demonstrate its reliability in reproducing

the general features of the rate-dependent behaviour together with the dependency upon suction.

Further tests are currently under consideration to extend model verification to others saturated and

unsaturated geomaterials