Residual elasto-plastic stresses analysis of polymeric thick-walled pressurized cylinder

Abstract EN

A theoretical solution is presented for polymeric thick pressurized cylinder, where material behaviour is described by the modified Von Mises criterion.

The solution is carried out using different values of Yc/Yt ratio to demonstrate their effects on the plastic zone radius and on the radial and hoop stresses also on the residual stress components.

The results is indicated that the influence of α ratio or (Yc/Yt) ratio on the plastic zone radius and stress distributions is significant, and it can be shown that , when α ratio increases the plastic zone radius decreases , the value of α ratio has no effect on the value and distribution of radial stress, and when α ratio increases the level of the hoop stress increases in the plastic zone and decreases in the elastic zone and the value of α ratio is directly proportional to the value of residual radial and hoop stresses in the cylinder.

A published finite element results give a reasonable agreement with the obtained results.