cranfield university mahadi abd murad an integrated structural ...

The same method was repeated to measure the maximum value of axial stress
and strain, as illustrated in Figure 3.25. The same elements – 5094 at the notch root and
element 2141 at the point away from the defect – were referred to throughout the course
of this study.
Figure 3.25: Finding the Axial stress concentration value ( K ) in the repaired
steel pipeline (i.e. at elements 5094 and 2141)
The maximum hoop and axial stresses at the notch root and nominal hoop and
axial stresses at the point away from the defect were tabulated and are given in Table
3.8. The stress concentration factor was determined at variable lengths of the composite
repair. In this study, the thickness of repair was only eight layers and the length of the
arc-shaped notch remained constant at 40 mm.
102
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