From an operator/engineering perspective, the correct assessment of the severity of corrosion defects (e.g., pits) can have enormous economic, social and environmental benefits; therefore the development of a generally applicable and simple to apply procedure for fatigue assessment of key components is recognised as a valuable tool, seeking to reduce the current overly conservative procedures whilst maintaining structural integrity. The critical condition for a crack emanating from a pit (pit-to-crack transition) to start to propagate is analysed in this paper. The pit-crack configuration is re-characterized into that of a hemispherical crack of length equal to the pit depth, and this assumption is analysed by detailed 3D FEA. A propagation threshold approach is used to estimate the fatigue resistance from intrinsic material properties. The proposed approach is validated by comparison with experimental results available in the open literature.
|Title of host publication||Operations, Applications and Components|
|Publisher||American Society of Mechanical Engineers (ASME)|
|Publication status||Published - 2015|
|Event||ASME 2015 Pressure Vessels and Piping Conference, PVP 2015 - Boston, United States|
Duration: 19 Jul 2015 → 23 Jul 2015
|Conference||ASME 2015 Pressure Vessels and Piping Conference, PVP 2015|
|Period||19/07/15 → 23/07/15|