Page 284 - Failure Analysis Case Studies II
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A type hosepipe
B type hosepipe
Fig. 2. The openings in the inner rubber layer.
(6) There were small openings in the outer surface of the inside middle layer in one B type hosepipe
(see Fig. 3).
4. Fracture analysis of layers
4.1. Fracture analysis of inner layer
Opening the fracture and inspecting by SEM, it was found that the fracture surfaces in both A
and B type hosepipes have the same characteristics, showing flats and radiating ridges (see Figs 4
and 5). Fatigue markings in the later period of propagation could be clearly observed (Fig. 6). The
