Pregled bibliografske jedinice broj: 1126314
Application of modified Locati method in fatigue strength testing of a turbo compressor blade
Application of modified Locati method in fatigue strength testing of a turbo compressor blade // Procedia Structural Integrity, 31 (2021), 33-37 doi:10.1016/j.prostr.2021.03.007 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 1126314 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Application of modified Locati method in fatigue
strength testing of a turbo compressor blade
Autori
Braut, Sanjin ; Tevčić, Marina ; Butković, Mirko ; Božić, Željko ; Žigulić, Roberto
Izvornik
Procedia Structural Integrity (2452-3216) 31
(2021);
33-37
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
Modified Locati method ; accelerated fatigue test ; compressor blade
Sažetak
The blades of axial turbomachines (steam and gas turbines, axial compressors) are highly stressed by centrifugal force, temperature, and alternating fluid forces, which leads to vibrations and fatigue cracking. This requires the studious engagement of designers and technologists. In this paper, a procedure for accelerated fatigue testing of a gas turbine compressor blade based on the modified Locati method is presented. The tests were performed on a vibration shaker with the frequency that equal the blade’s first natural frequency. S-N curves were estimated according to two approximate representation namely one-slope and two-slope models. Then, the blades were tested at different stress levels starting at a level below foreseen fatigue strength at the specified fatigue life. In each loading block, a blade was subjected to 2ˑ107 cycles. After the first block was completed, the stress level in the second loading block was increased by 20 MPa and a new 2ˑ107 cycles were applied. A procedure was repeated until the blade failure occurred. It was considered that a blade has failed when its natural frequency drops by more than 2%. After the failure, the fatigue strength was calculated using Palmgren -Miner rule.
Izvorni jezik
Engleski
Znanstvena područja
Strojarstvo, Zrakoplovstvo, raketna i svemirska tehnika, Temeljne tehničke znanosti
POVEZANOST RADA
Projekti:
--uniri-tehnic-18-225 - Nelinearno dinamičko ponašanje rotacijskih strojeva (NONDYNROT) (Braut, Sanjin) ( CroRIS)
Ustanove:
Tehnički fakultet, Rijeka,
Fakultet strojarstva i brodogradnje, Zagreb,
Veleučilište u Karlovcu
Profili:
Marina Tevčić
(autor)
Željko Božić
(autor)
Mirko Butković
(autor)
Roberto Žigulić
(autor)
Sanjin Braut
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Scopus