Abstract:Repurposing existing natural gas pipelines for hydrogen transport requires an accurate assessment of the distribution of hydrogen (H) atoms at surface defects such as dents under frequent pressure fluctuations encountered on gas pipelines. In this work, a 3-dimensional finite element-based model was developed to determine the stress/strain and H atom concentrations at an unconstrained dent on an X52 steel pipe experiencing denting, spring-back and cyclic loading processes. As expected, a stress/strain concentr… Show more
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