Hi all, i've FEAP 7.5 and i'm trying to define a soil stratum for a simply analysis (a 2D plane strain, i.e. §12.7 example 1 on limit analysis of Wai-Fah Chen). In FEAP i've look in inmate.f (not in user_manual) that there's the plastycicy generalized model. I've the cohesion C, the frictional angle PHI, the elastic modulus Ee (nu, the Poisson coefficient relate to PHI). Always in inmate.f I've noted that the related print out instruction - write(iow,2047) - refer to <Yield stress, Yield stress inf, Transition parameter, Hiso, Hkin>. I've also read that in general form the generalized plastic criterion is outlined how:

Dear researchers,

My name is Chi and I just started my PhD study two months ago. I am experimentally and numerically studying the pore pressure build-up in sands during the pile load test and hence, at the first stage, I need to have a constitutive model for soil with both dilatancy and hardening behaviors.

Research activities on soil models, porous media, poroelasticity.