Solutions of Stress Intensity Factors of Subsurface Cracks
In the present paper, an integral transform-based method is presented for calculating the stress intensity factors of subsurface cracks. Due to the interaction between the crack and the free surface, the crack tip fields are generally of I-II mixed mode. The solutions for two typical configurations, a Griffith crack and a circular crack beneath the free surface of a semi-infinite solid, are derived.
Hong-Yuan Liu, Xiaozhi Hu and Mark Hoffman
X. Q. Feng and M. Xu, "Solutions of Stress Intensity Factors of Subsurface Cracks", Key Engineering Materials, Vol. 312, pp. 83-88, 2006