Crack Paths 2009

Figure 2. Crack propagation in test specimen, Sp2003.

Figure 3 shows the fracture surface of the specimen, where multiple fatigue cracks are

initiated from the weld root, and their crack surfaces show slightly inclined angles due

to the high out-of-plane shear stress with respect to the plane of the lack-of-penetration

zone.

Figure 3. Fracture surface of test specimen, Sp2003.

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