@article{Hasmatuchi:15338,
      recid = {15338},
      author = {Hasmatuchi, Vlad and Rittiner, Robin and Boyer-Pires,  Salomé and Lecointre, Charly-Loup and Nicolet, Christophe  and Münch-Alligné, Cécile and Rey-Mermet, Samuel},
      title = {Experimental facility dedicated to detection and  prediction of penstock fatigue induced by pressure  oscillations},
      publisher = {IOP Publishing},
      journal = {IOP Conference Series: Earth and Environmental Science ;  Proceedings of the 32nd IAHR Symposium on Hydraulic  Machinery and Systems, 11-14 September 2024, Roorkee,  India},
      address = {Bristol, UK. 2024-09},
      number = {CONFERENCE},
      pages = {11 p.},
      abstract = {Hydroelectric powerplants play a vital role in the  electricity production mix, especially during the ongoing  energy transition towards renewable sources. However, they  face operational challenges due to harmful stress loading  of various components. Ensuring safe operation remains  essential for people's safety, electricity supply, and  costs avoidance. The study focuses on penstocks and  pipelines material damaging caused by fatigue, crack  initiation and propagation. These critical components are  often several decades old and expensive to refurbish or  replace. Cycling loading, induced by pressure oscillations  during start-stop or transient operations, accelerates  material fatigue. Steel lining corrodes over time, and  welds may contain original defects. To address this, a new  testing facility that generates controlled cyclic pressure  oscillations using the water hammer effect has been built.  This specific closed-loop circuit allows accelerated  fatigue testing of material probes, providing insights into  crack initiation and propagation. The test rig operating  principle is described while its 1D numerical model is  introduced and validated with measurement data. The  prediction of crack incipience and rupture of a tubular  specimen with a pre-machined longitudinal weakening is in  the end compared with the results of a fatigue test  conducted on the test bench.},
      url = {http://arodes.hes-so.ch/record/15338},
      doi = {https://doi.org/10.1088/1755-1315/1411/1/012039},
}