Creep behavior of rotating FGM disc with linear and hyperbolic thickness profiles
Mathematical model has been developed to investigate steady state creep in a variable thickness rotating disc made of functionally graded Al-SiCp. The SiCp content in the disc is assumed to decrease from the inner to outer radius. The creep behavior of the disc material is described by threshold str...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Kragujevac, Faculty of Science
2015-01-01
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| Series: | Kragujevac Journal of Science |
| Subjects: | |
| Online Access: | http://scindeks-clanci.ceon.rs/data/pdf/1450-9636/2015/1450-96361537035D.pdf |
| Summary: | Mathematical model has been developed to investigate steady state creep in a variable thickness rotating disc made of functionally graded Al-SiCp. The SiCp content in the disc is assumed to decrease from the inner to outer radius. The creep behavior of the disc material is described by threshold stress based law with a stress exponent of 5. The stresses and strain rates in the disc are estimated by solving creep constitutive equations along with the equilibrium equation for a rotating disc. The stresses and strain rates have been estimated for similar FGM discs with three different thickness profiles i.e. constant thickness, linearly varying thickness and hyperbolic varying thickness. The FGM disc having hyperbolic thickness profile exhibits the lowest stresses and strain rates compared linear or constant thickness disc. The tangential and radial strain rates in FGM discs with linear and hyperbolic thickness profiles are respectively lower by about two and three orders of magnitude when compared to a constant thickness FGM disc. The FGM discs having linear and hyperbolic thickness profiles possess lesser chances of distortion due to relatively uniform distribution of radial strain rate. |
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| ISSN: | 1450-9636 2466-5509 |