Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/4255
Title: Creep deformation and stress analysis in rotating disks of composite materials
Researcher: Dharmpal, Deepak
Guide(s): Gupta, Vinay Kumar
Dham, Ashok Kumar
Keywords: Creep
stress analysis
rotating disks
Mechanical Engineering
Upload Date: 16-Aug-2012
University: Punjabi University
Completed Date: August, 2011
Abstract: The present study is an attempt to investigate the steady state creep behavior of a rotating disk made of isotropic composite containing aluminum/aluminium alloy matrix reinforced with silicon carbide particles or whiskers. The creep behavior of the composite is described by a threshold stress based creep law. The creep parameters appearing in the law have been extracted from the experimental uni-axial creep data available for Al?SiCp. In the first segment of the study, the effect of stress exponent, appearing in the creep law, has been studied on the steady state creep of a constant thickness rotating disk made of isotropic Al?SiCp composite. The stresses and strain rates have been estimated by assuming the values of stress exponent as 3, 5 and 8. The study reveals that the values of stresses and strain rates in the disk are significantly affected by varying the stress exponent. The steady state creep rates in the disk increases by about two orders of magnitude with the increase in stress exponent from 3 to 8. The next segment of the study investigates steady state creep in a variable thickness rotating disk made of Al-SiCp. The creep stresses and creep rates have been estimated in the composite disks having linear and hyperbolic thickness profiles. It is revealed that the stresses and strain rates in the disk could be reduced significantly by varying the disk thickness profile. The composite disk having linearly varying thickness exhibits the lowest stresses and strain rates than that observed in hyperbolic or uniform thickness disk. The third segment of the study deals with the analysis of creep behavior in a rotating disk made of functionally graded composite and having linearly varying thickness. The content of SiCp reinforcement in the FGM disk is assumed to decrease linearly from the inner to the outer radius. The study indicates that with the increase in SiCp gradient in the disk, the radial stress increases over the entire radius..
Pagination: 227p.
URI: http://hdl.handle.net/10603/4255
Appears in Departments:University College of Engineering

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01_title.pdfAttached File72.1 kBAdobe PDFView/Open
02_certificate.pdf70.77 kBAdobe PDFView/Open
03_declaration.pdf63.64 kBAdobe PDFView/Open
04_acknowledgements.pdf60.82 kBAdobe PDFView/Open
05_abstract.pdf56.15 kBAdobe PDFView/Open
06_table of contents.pdf89.1 kBAdobe PDFView/Open
07_list of research publications.pdf106.2 kBAdobe PDFView/Open
08_list of figures.pdf109.25 kBAdobe PDFView/Open
09_list of tables.pdf84.72 kBAdobe PDFView/Open
10_nomenclature.pdf111.53 kBAdobe PDFView/Open
11_chapter 1.pdf216.61 kBAdobe PDFView/Open
12_chapter 2.pdf999.05 kBAdobe PDFView/Open
13_chapter 3.pdf254.45 kBAdobe PDFView/Open
14_chapter 4.pdf235.19 kBAdobe PDFView/Open
15_chapter 5.pdf389.66 kBAdobe PDFView/Open
16_chapter 6.pdf232.15 kBAdobe PDFView/Open
17_chapter 7.pdf214.6 kBAdobe PDFView/Open
18_chapter 8.pdf96.13 kBAdobe PDFView/Open
19_bibliography.pdf118 kBAdobe PDFView/Open


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