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AuthorZheng, Y.
AuthorBahaloo, H.
AuthorMousanezhad, D.
AuthorMahdi, E.
AuthorVaziri, A.
AuthorNayeb-Hashemi, H.
Available date2017-01-08T07:57:05Z
Publication Date2016-12
Publication NameInternational Journal of Mechanical Sciences
Identifierhttp://dx.doi.org/10.1016/j.ijmecsci.2016.10.018
CitationY. Zheng, H. Bahaloo, D. Mousanezhad, E. Mahdi, A. Vaziri, H. Nayeb-Hashemi, Stress analysis in functionally graded rotating disks with non-uniform thickness and variable angular velocity, International Journal of Mechanical Sciences, Volume 119, December 2016, Pages 283-293
ISSN00207403
URIhttp://www.sciencedirect.com/science/article/pii/S002074031630532X
URIhttp://hdl.handle.net/10576/5153
AbstractStress field in functionally graded (FG) rotating disks with non-uniform thickness and variable angular velocity is studied numerically. The elastic modulus and mass density of the disks are assumed to be varying along the radius as a power-law function of the radial coordinate, while the Poisson's ratio is kept constant. The governing equations for the stress field is derived and numerically solved using the finite difference method for the case of fixed-free boundary conditions. Additionally, the effect of material gradient index (i.e., the level of material gradation) on the stress field is evaluated. Our results show that the optimum stress field is achieved by having a thickness profile in the form of a rational function of the radial coordinate. Moreover, a smaller stress field can be developed by having greater mass density and elastic modulus at the outer radius of the disk (i.e., ceramic-rich composites at the outer radius). The numerical results additionally reveal that deceleration results in shear-stress development within the disks where a greater deceleration leads to greater shear stress; however this has almost no effect on the radial and circumferential stresses. Furthermore, the shear stress can cause a shift in the location of the maximum Von Mises stress, where for small deceleration, maximum Von Mises stress is located somewhere between the inner and outer radii, while for large deceleration it is located at the inner radius.
SponsorThis report was made possible by a NPRP award [NPRP 5–068-2–024] from the Qatar National Research Fund (a member of the Qatar Foundation).
Languageen
PublisherElsevier
SubjectFunctionally graded materials
Rotating disk
Variable angular velocity
Non-uniform thickness
Finite difference method
TitleStress analysis in functionally graded rotating disks with non-uniform thickness and variable angular velocity
TypeArticle
Pagination283-293
Volume Number119
dc.accessType Abstract Only


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