Taking into account the residual stresses during transverse calculation of the load frame to extend the service life above the warranty period

Аннотация

We study the possibility of accounting for the influence of residual stress in structural elements of a high-duty item on the strain–stress state and predicting the residual life of cyclical strength throughout the entire part for an extension of the safety period. Checking calculation of the static strength checking by computer simulation reveals that the influence of residual stress on the stress field from the external load is more difficult to determine than by simple algebraic addition. It is shown that the part under the action of external cyclical stresses with the maximum peak intensity of external stresses should be considered as a structure under multicycle fatigue conditions, since the intensity of total (external and residual) stresses is higher than the endurance limit.