ABSTRACT
In the previous chapter, a full-range plasticity solution for an EPS thick ring was developed in detail to illustrate the fundamental concepts of plastic analysis. This was possible only because a thick ring subjected to internal or external “pressure” is essentially a one-dimensional problem in that there is only one governing equilibrium equation since there is no variation of the field in the hoop direction. At any stage of plastic deformation, this equation can be integrated directly to determine the stress field. The strain and deformation field is then determined from the behavior of the elastic rim, which has not yet yielded.
