Service life of a belt chamber-plasticity aspects

Abstract

The life time of the belt compound vessel is solved from the point of view of a fracture mechanics. It is shown that the existence of plastic deformations created in the matrix of the vessel during working state has practically no influence on the behaviour of the dominant crack and that for estimation of the critical state of the vessel the knowledge of the corresponding stress intensity factor is sufficient. The dominant crack grows under small scale yielding conditions until final fracture of the matrix.

Key Words:

• fracture mechanics
• high pressure vessel