Creep-plasticity-fatigue calculations in the design of porous double layers for new transpiration cooling systems
نویسندگان
چکیده
New porous double layer (PDL) transpiration cooling technologies can allow gas turbine entry temperatures to be increased beyond current limits towards higher engine efficiency. However, PDL systems require inclined film holes with stress concentration factors in excess of 3.8. Combination thermoelastic Finite Element (FE) analysis Neuber type local strain approaches gives similar cyclic range predictions plasticity-creep FE analysis. Fatigue crack initiation at occurs a low number cycles due excessive plasticity. Our study establishes links between elastic-inelastic analyses and material phenomena-PDL geometry indicates pathways improving life.
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ژورنال
عنوان ژورنال: International Journal of Fatigue
سال: 2021
ISSN: ['1879-3452', '0142-1123']
DOI: https://doi.org/10.1016/j.ijfatigue.2021.106304