Zobrazeno 1 - 10
of 17
pro vyhledávání: '"G. A. Ahmadzadeh"'
Autor:
T. V. Bogomolova, G. A. Ahmadzadeh
Publikováno v:
Известия высших учебных заведений: Проблемы энергетики, Vol 25, Iss 1, Pp 14-23 (2023)
THE PURPOSE. To estimate the most effective length of the working blade of the last stage of a powerful wet-steam turbine in terms of obtaining its maximum efficiency and to optimize the parameters of this stage in the design mode. For this stage, pe
Externí odkaz:
https://doaj.org/article/f741ef26e5464bf2b27de9244d04a914
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
Fatigue & Fracture of Engineering Materials & Structures. 41:1588-1601
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::806ddf75868833f12c6512d61987ac09
https://doi.org/10.1111/ffe.12798
https://doi.org/10.1111/ffe.12798
Publikováno v:
Thin-Walled Structures. 123:317-323
The present study evaluates ratcheting response of pressurized elbow pipes made of three steel alloys of austenitic stainless steel, 1020 steel, and 304L stainless steel subjected to external bending under load-controlled conditions by means of the A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7eb6968c8b0a0059a1b546e8ead93fdb
https://doi.org/10.1016/j.tws.2017.11.021
https://doi.org/10.1016/j.tws.2017.11.021
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
International Journal of Damage Mechanics. 28:35-57
The present study evaluates fatigue damage of four steel alloys, mild steel, SS347, SNCM439, and SNCM630, by means of Socie, Ellyin, and Varvani-Farahani damage models. The Socie model assesses fatigue damage through product of maximum principal stra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2efaae56ea8e61ccecef228066f09c97
https://doi.org/10.1177/1056789517741531
https://doi.org/10.1177/1056789517741531
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
Mechanics of Materials. 101:40-49
The present study investigates ratcheting response of 304, 1045, 1026 and 1018 steel samples undergoing butterfly loading paths with different loading sequences/ directions through the newly developed kinematic hardening rule of Ahmadzadeh–Varvani
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cff0f878082c2275f26eff52e75e6cb
https://doi.org/10.1016/j.mechmat.2016.07.010
https://doi.org/10.1016/j.mechmat.2016.07.010
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
Mechanics of Materials. 98:59-70
Three energy-based models of Macha, Ellyin and Varvani, respectively, are employed to evaluate fatigue life of SS304 and Al 7050-T7451 alloys undergoing variable multiaxial loading spectra. The Macha damage approach assesses the lives based on the eq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7cb413ef2016de3eb3ad5149ea59217
https://doi.org/10.1016/j.mechmat.2016.04.007
https://doi.org/10.1016/j.mechmat.2016.04.007
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
International Journal of Fatigue. 84:113-121
Fatigue life of different steel alloys undergoing multiaxial irregular loading spectra was evaluated based on two energy-based models of Łagoda–Macha (LM) and Varvani-Farahani. The LM damage model evaluated the life of samples from calculation of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19313fca6513d88731c87f6e325680bd
https://doi.org/10.1016/j.ijfatigue.2015.11.018
https://doi.org/10.1016/j.ijfatigue.2015.11.018
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
Journal of Composite Materials. 50:2389-2397
The present study intends to examine ratcheting response of SiCP particle-reinforced Al 6061 matrix (Al 6061/SiCP) composite samples over asymmetric load cycles based on the kinematic hardening rule of Ahmadzadeh–Varvani. The Ahmadzadeh–Varvani h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7638a90409132e0853381e6953e1e13
https://doi.org/10.1177/0021998315604037
https://doi.org/10.1177/0021998315604037
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
Materials & Design. 51:231-241
The present study examines the capability of a recently modified hardening rule to characterize ratcheting response of materials subjected to multi-step uniaxial stress cycles. The modified hardening rule was developed based on Armstrong–Frederick
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1755149e8a3a256bae8d4be31d461ee
https://doi.org/10.1016/j.matdes.2013.04.047
https://doi.org/10.1016/j.matdes.2013.04.047
Autor:
G. R. Ahmadzadeh, A. Varvani-Farahani
Publikováno v:
Applied Composite Materials. 21:417-428
The present study intends to examine ratcheting response of Glass Fiber Reinforced Polymer (GFRP) composites over fatigue cycles by means of parametric variables. Stages of ratcheting deformation were related to stress cycles, lifespan, mechanical pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ab9f8f461e1c9384c7a3060e9607873
https://doi.org/10.1007/s10443-013-9341-8
https://doi.org/10.1007/s10443-013-9341-8