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Modeling the viscoplastic behavior of inconel 718 at 1200 f
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Abdel-Kader, M. S. Jones, D. L. Eftis, J. |
| Copyright Year | 1988 |
| Description | A large number of tests, including tensile, creep, fatigue, and creep-fatigue were performed to characterize the mechanical properties of Inconel 718 (a nickel based superalloy) at 1200 F, the operating temperature for turbine blades. In addition, a few attempts were made to model the behavior of Inconel 718 at 1200 F using viscoplastic theories. The Chaboche theory of viscoplasticity can model a wide variety of mechanical behavior, including monotonic, sustained, and cyclic responses of homogeneous, initially-isotropic, strain hardening (or softening) materials. It is shown how the Chaboche theory can be used to model the viscoplastic behavior of Inconel 718 at 1200 F. First, an algorithm was developed to systematically determine the material parameters of the Chaboche theory from uniaxial tensile, creep, and cyclic data. The algorithm is general and can be used in conjunction with similar high temperature materials. A sensitivity study was then performed and an optimal set of Chaboche's parameters were obtained. This study has also indicated the role of each parameter in modeling the response to different loading conditions. |
| File Size | 1301127 |
| Page Count | 32 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880012118 |
| Archival Resource Key | ark:/13960/t15n13t7x |
| Language | English |
| Publisher Date | 1988-04-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Service Life Fatigue Life Creep Properties Turbine Blades Cyclic Loads Tensile Strength Inconel Trademark Isotropic Media Algorithms Temperature Effects Heat Resistant Alloys Viscoplasticity Mathematical Models Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
