Publication

Abstract : A Numerical analysis is performed to investigate the effect of Poisson's ratio, aspect ratio (crack length to width of the specimen) and residual stress on the stress intensity factor (SIF) of standard specimens. It was found that as the Poisson's ratio and crack length (keeping width constant) was increased the SIF also increases. The primary or secondary manufacturing process used for preparing the specimen results in formation residual stress in the specimen which could affect the SIF. In this work,the specimen was subjected to thermal gradient which resulted in the tensile residual stress. This nature of residual stress leads to an increase in the estimated SIF. Thus, in the remaining life calculation of components in service, these factors must to taken into account.