Application of high-strength steel for welded penstock increased the probability of crack-like defects and in welded joint. Structural integrity assessment procedure is presented and applied to welded penstock produced of highstrength steel, comparing crack driving force and material crack resistance in terms of J-integral as fracture mechanics parameter. The safety and structural integrity of welded penstock are experimentally verified by testing of penstock models and precracked specimens, with special attention paid to matching effect and microstructural heterogeneity in HAZ.
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Sedmak, S., Sedmak, A. (2008). Welded Penstock, Produced of High-Strength Steel and Application of Fracture Mechanics Parameters to Structural Integrity Assessment. In: Pluvinage, G., Elwany, M.H. (eds) Safety, Reliability and Risks Associated with Water, Oil and Gas Pipelines. NATO Science for Peace and Security Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6526-2_15
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DOI: https://doi.org/10.1007/978-1-4020-6526-2_15
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