Plasticity

Hi all,

      I doing modelling on soft clay behaviour which exhibit softening behaviour during constant strain loading. Here i followed a non-associated flow rule for better prediction of dilation . For the case of non-associated flow rule yield function and plastic potential function should not same i clear in that , my doubt is that we can use two different surface for yield and plastic potential function (eg: linear surface as yield surface and elliptical surface as plastic potential )? 

Hello,

I am trying to derive/find an analytical expression
for the torsion of a round bar made of an heterogeneous material. But I just do
not seem to find any solution available in the literature other than for a
homogeneous material, which can be find in any theory of plasticity book (e.g.
Theory of Plasticity, 3rd Ed., J. Chakarabarty, pp. 132-136).

Dear all,

Is there any one of you know a material model which can reflect the orthotropic , hysteresis, and load ratio dependence behaviors? 

Every helps would be highly appreciated.

Kindest regards,

Ken

Dear Colleagues,

Dear Colleagues,

The new deadline for abstract (plain text, 400 word limit) submission is now January 28, 2013.

The 4th conference "Nonlinear Dynamics -2013" will be held from 19 until 22 June, 2013 in Sevastopol (Ukraine).

Conference web-site: https://sites.google.com/site/ndkhpi2013/home