STRESS INTENSITY FACTORS FOR THREADED CONNECTIONS

A generic stress intensity factor (SIF) solution for threaded connecti ons is presented in this paper. This is based on multiple reference st ate weight function theory, making it applicable to any mode I crack e manating from a thread root. The reference SIFs required for the solut ion are a combination of published results representing geometrical fe atures encountered in threaded components. These constitutive componen ts of the reference solutions can easily be replaced in the event of m ore comprehensive or appropriate solutions becoming available. For thi s reason it is considered prudent to present the structure of the solu tion rather than a rigid set of parametric expressions so that specifi c solutions can be fashioned for particular applications. The new solu tion is rigorously examined, comparing it with published SIF solutions for threaded and related components.