Stress Intensity Factors for Semicircular Cracks: Part 2—Semi-Infinite Solid

Abstract

The stress intensity factor for a semicircular edge crack is derived. Numerical values for axial, bending, and thermal loads in half spaces and plates are presented. The results show that a magnification of the stress intensity factor of about 20 percent occurs at the free surface.

Through thickness property variations in friction stir welded AA6061 joint fatigued in very high cycle fatigue regime

“…The effective fatigue stress intensity factor DK at the end of the flat zone was calculated for all failed specimens according to the computing method for semicircular crack in infinite solid [33], and the results were presented in Fig. 9a.…”

Research on stress intensity factors of elliptical hole in infinite body

“…The displacement discontinuity D i is defined as the difference in displacement between the two sides of the segment [18] (see Fig.1):…”

“…For a semicircular surface crack in a semi-infinite solid and a semi-elliptical surface crack in a plate of finite thickness, Smith, Emery, and Kobayashi [18], and Kobayashi [19], respectively, used the alternating method to obtain stress intensity factors along the crack front.…”

Fracture and Fatigue Crack Growth Behavior of Surface Flaws and Flaws Originating at Fastener Holes. Volume 1. Results and Discussion

“…Equation 3 was obtained by multiplying the stress intensity factor at the end of the major axis of a fully embedded elliptical crack by a constant factor of 1.1. Smith (21) and Thresher and Smith (13) have calculated stress intensity factors at the points where the peripheries of semi-circular surface flaws and partcircular cracks intersect the specimen surface and derived factors for Equation 3 ranging from 1.1 to 1.26. Recent unpublished work by Smith has led to even higher factors for Equation 3 for long deep surface cracks.…”