Chahardehi, Amir EbrahimBrennan, Feargal P.2010-01-182010-01-182010-01A. Chahardehi, F.P. Brennan, A novel weight function for RMS stress intensity factor determination in surface cracks, Engineering Fracture Mechanics, Volume 77, Issue 2, Microstructurally Based Fracture Mechanics, January 2010, Pages 367-3730013-7944http://dx.doi.org/10.1016/j.engfracmech.2009.04.009http://hdl.handle.net/1826/4151This paper discusses the problem of stress intensity factor determination in surface cracks. In particular, the concept of root mean square stress intensity factors (RMS SIF) is discussed for the general class of semi-elliptical surface cracks. The weight function SIF derivation method is considered problems with the existing techniques are highlighted, and a novel technique for the derivation of the RMS SIF weight functions for surface cracks is presented and results are compared with numerical solutions for a variety of loadings and geometries.enStress intensity factorWeight functionCrack aspect ratioParis lawSurface crackRMS SIFArticle