Page 142 - Failure Analysis Case Studies II

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Fig. 13. Port hull plates and longitudinal bulkhead fractures: deformation to the web frame on the port side
is also visible.

5 Brittle fracture
6 Brittle fracture
7 Brittle fracture
LB = longitudinal bulkhead-3 in. (75 mm) brittle fracture; 1 ft (300 mm) ductile (then heavily
deformed).
8 1 in. (25 mm) brittle crack ran into drainhole; ductile above
9 1 in. (25 mm) brittle crack ran into di-ainhole; 6in. (150mm) brittle fracture before ductile
10 Brittle fracture
11 Brittle fracture
12 1 in. (25mm) brittle fracture, drainhole; 4in. (100mm) ductile, brittle above
13 1 in. (25 mm) brittle fracture, drainhole, ductile above
Longitudinals port of centre girder (numbering from centre girder)
1 1 in. (25mm) brittle fracture, drainhole, brittle above
2 2in. (50mm) brittle fracture, drainhole, brittle above
3 Brittle fracture
4 Shear fracture along weld (lack of penetration) into drainhole, plate 4 in. (100 mm) proud of
main fracture, ductile for 4 in. (100 mm), brittle fracture above
5 Brittle fracture
6 Brittle fracture
7 Brittle fracture
LB = longitudinal bulkhead-ductile and heavily deformed.