Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Kiyohiro Ito"'
Autor:
Kiyohiro ITO
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 89, Iss 923, Pp 23-00124-23-00124 (2023)
Young’s modulus is one of the most important mechanical properties of materials, and several methods, such as the indentation method, ultrasonic pulse method, and laser-induced surface acoustic wave method, have been developed to measure it both st
Externí odkaz:
https://doaj.org/article/54d3bd87b2e2418eadcf6a3b51d1496c
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 88, Iss 907, Pp 22-00002-22-00002 (2022)
In this study, a finite element (FE) analysis code installing an inelastic constitutive model and crack growth algorithm for thermal barrier coatings (TBCs) developed by Arai et al. was applied to TBCs and porous TBCs (P-TBCs) to evaluate stress, dam
Externí odkaz:
https://doaj.org/article/6267f4d75f16407bad7f10deb2bf96fd
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 88, Iss 906, Pp 21-00366-21-00366 (2022)
An advanced thermal barrier coating development is demanded for achieving the next generation gas turbine with a high efficiency. As one of many candidates in TBCs, RTa3O9 in a perovskite-type oxide attracts attention owing to the low thermal conduct
Externí odkaz:
https://doaj.org/article/34b60a746c364b4dbb2c498a441cb9b4
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 87, Iss 901, Pp 21-00086-21-00086 (2021)
Thermal barrier coating (TBC) is widely applied to gas turbine blade surface to protect the metallic substrate from high-temperature combustion gas flow. Porous TBC system has been developed by our research group in order to further increase the turb
Externí odkaz:
https://doaj.org/article/d62f74964d044a7bb5cd28fa61202b93
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 87, Iss 898, Pp 21-00092-21-00092 (2021)
An overlay welding is widely employed to repair damaged components in aged thermal power plants. However, the overlay welding causes heat-affected zone and tensile residual stress which reduce the high-temperature strength of these components. Our re
Externí odkaz:
https://doaj.org/article/a1bb18d2367749718b18766187399efa
Publikováno v:
Mechanical Engineering Journal, Vol 7, Iss 4, Pp 20-00232-20-00232 (2020)
The creep exponent, n, and creep coefficient, k, in Norton’s law characterizes the creep deformation of a high-temperature material. For identifying the creep constants, the uniaxial creep test is generally conducted. However, it is required to pre
Externí odkaz:
https://doaj.org/article/48005669b7614bfb9b2366078bfc1a0a
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 86, Iss 886, Pp 20-00060-20-00060 (2020)
Johnson-Cook (JC) flow stress model is widely used in computer aided engineering (CAE) for simulations of car crash and machining behaviors. The JC parameter C, which is a material constant in the model associated with strain rate dependency, is usua
Externí odkaz:
https://doaj.org/article/4b128f6b670c4cc7af3166bc65ec0cee
Publikováno v:
Mechanical Engineering Journal, Vol 7, Iss 2, Pp 20-00010-20-00010 (2020)
Thermal barrier coatings (TBCs) applied to turbine blades indicate nonlinear deformation and complex fracture behavior due to the microstructure which is formed by deposition of molten particles. In this study, in order to accurately simulate these b
Externí odkaz:
https://doaj.org/article/b15bfa93547a4c8b847e4451a64982a9
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 86, Iss 883, Pp 19-00426-19-00426 (2020)
Thermal barrier coating (TBC) is deposited onto the surface of gas turbine blade in order to prevent from a high-temperature combustion gas flow. Crack and delamination of ceramic top coating (TC), which come from a high heat flux loading, are seriou
Externí odkaz:
https://doaj.org/article/39263c5623034796bc10cfa5d1d502b5
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 85, Iss 877, Pp 19-00204-19-00204 (2019)
The icing phenomenon, which is due to continuous deposition of water droplets or super-cooled droplets, causes serious problems, such as airplane crashes and power line tower collapse, in various fields. It is important to understand the fundamental
Externí odkaz:
https://doaj.org/article/3af01cb07ea1451f999db6d37257b34f