Modeling of Creep Behavior of a Rotating Disc in the Presence of Both Composition and Thermal Gradients
Author:
Gupta V. K.1, Singh S. B.2, Chandrawat H. N.3, Ray S.4
Affiliation:
1. Dept. of Mechanical. Engg., T.I.E.T., Patiala-147 004, India 2. School of Mathematics & Computer Applications, T.I.E.T., Patiala-147 004, India 3. Amritsar College of Engg. & Tech., Amritsar, India 4. Metallurgical and Materials Engineering Dept., I.I.T., Roorkee-247 667, India
Abstract
The creep behavior of a rotating disc made of isotropic composite containing varying amounts of silicon carbide in the radial direction has been investigated in the presence of a thermal gradient, also in the radial direction. The variation of silicon carbide content has been so tailored as to contain larger amounts of particles in a highly stressed region. This type of inhomogeneous material is known as Functionally Graded Material (FGM). The thermal gradient experienced by the disc is the result of braking action as estimated by FEM analysis. The creep behavior of the disc under stresses developing due to rotation has been determined following Sherby’s law and compared with that of a similar disc following Norton’s law. The difference in the distribution of stresses and strain rates in the discs does not follow any definite trend but the values are somewhat different. The presence of thermal gradient and a linear particle gradient separately or their simultaneous presence result in a significant decrease in steady state creep rates as compared to that in a composite disc with the same average particle content (20 vol %) distributed uniformly and operating under isothermal condition. Further, the study revealed that the creep behavior of a FGM disc could be significantly improved by increasing the gradient of particle distribution while keeping the same average particle content of 20 vol % silicon carbide in the disc.
Publisher
ASME International
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference31 articles.
1. Hirai, T., 1996, “Functionally Gradient Materials,” Materials Science and Technology, R. W. Chan, P. Hassen, and E. J. Cramer, eds., VCH, Weinheim, Germany, 17B, pp. 293–341. 2. Koizumi, M. , 1997, “FGM Activities in Japan,” Composites, Part B, 28(1), pp. 1–4. 3. Zhu, J., Lai, Z., Yin, Z., Jeon, J., and Lee, S., 2001, “Fabrication of ZrO2–NiCr Functionally Graded Materials by Powder Metallurgy,” Mater. Chem. Phys., 68(1-3), pp. 130–135. 4. Pattnayak, D. K., Bapat, V. P., and Rama Mohan, T. R., 2001, “Techniques for the Synthesis of Functionally Graded Materials,” Proc. National Seminar on Functionally Graded Materials FGM-2001, DRDO, Ambernath, India, pp. 86–93. 5. Singh, S. B., and Ray, S., 2001, “Steady State Creep Behavior in an Isotropic Functionally Graded Material Rotating Disc of Al-SiC Composite,” Metall. Trans. A, 32(7), pp. 1679–1685.
Cited by
50 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献
|
|