Perhaps, some may say, it shows that state failure is an extremely elastic term, embracing both countries in total collapse (Somalia, Chad) and those which merely contain large ungoverned Spaces.

Different functions for principal stress were used as elastic medium failure conditions at the boundary with the crushing zone and plasticity within the latter based on Coulomb rule.

Besides static strength, the problem of optimization and design was studied when the failure took place owing to structural linear elastic buckling in this paper also.