Von mises and Tresca stress criterion

Hi Assanm, If I did understand you correctly, so "Von mises and Tresca stress criterion" relates to the theory of plasticity. To gain the knowledge about these criterions you can find in some following books :

-Metal Forming Mechanics and Metallurgy

-Introduction to Computational Plasticity

They both provide in short basic stuffs about these criterion.

For more detail, If you don't mind, contact to me for some more books in Russian, in my opinion they are also useful :)

http://en.wikipedia.org/wiki/Von_Mises_yield_criterion