Fatigue crack growth modelling for pipeline carbon steels under gaseous hydrogen conditions

Sensitivity Analysis of Fatigue Crack Growth Model for API Steels in Gaseous Hydrogen

A model to predict fatigue crack growth of API pipeline steels in high pressure gaseous hydrogen has been developed and is presented elsewhere. The model currently has several parameters that must be calibrated for each pipeline steel of interest. This work provides a sensitivity analysis of the model parameters in order to provide (a) insight to the underlying mathematical and mechanistic aspe...

A Review of Fatigue Crack Growth for Pipeline Steels Exposed to Hydrogen

Hydrogen pipeline systems offer an economical means of storing and transporting energy in the form of hydrogen gas. Pipelines can be used to transport hydrogen that has been generated at solar and wind farms to and from salt cavern storage locations. In addition, pipeline transportation systems will be essential before widespread hydrogen fuel cell vehicle technology becomes a reality. Since hy...

Modelling of high temperature fatigue crack growth in Inconel 718 under hold time conditions

Assessing and modelling the uncertainty in fatigue crack growth in structural steels

The prediction of the fatigue life of steel structures can be carried out in a number of different ways. A common method at the design stage is to use the so-called S-N approach using design data from a standard such as BS 7910. However, for existing structures containing defects of a known or postulated size, a fatigue life assessment is generally carried out using fracture mechanics. In keepi...

Fatigue of polycrystalline silicon for microelectromechanical system applications: crack growth and stability under resonant loading conditions

Although bulk silicon is not known to exhibit susceptibility to cyclic fatigue, micron-scale structures made from silicon films are known to be vulnerable to degradation by fatigue in ambient air environments, a phenomenon that has been recently modeled in terms of a mechanism of sequential oxidation and stress-corrosion cracking of the native oxide layer. To date, most stress-life (S=N ) fatig...