Steady-state creep analysis of a functionally graded thick cylinder subjected to internal pressure and thermal gradient

2012 ◽  
Vol 103 (8) ◽  
pp. 1042-1051 ◽  
Author(s):  
Tejeet Singh ◽  
Vinay Gupta
Keyword(s):  
Steady State ◽  
Internal Pressure ◽  
Thermal Gradient ◽  
Functionally Graded ◽  
Steady State Creep ◽  
Creep Analysis ◽  
Thick Cylinder

Steady-State Creep Analysis of the Weight Loadings of Furnace Tubes on Multiple Supports

1959 ◽  
Vol 81 (2) ◽  
pp. 115-125
Author(s):  
J. L. Jacobowitz ◽  
C. K. Mader
Keyword(s):  
Steady State ◽  
Internal Pressure ◽  
High Temperatures ◽  
Tube Wall ◽  
Steady State Creep ◽  
Design Consideration ◽  
Secondary Effects ◽  
Creep Stress ◽  
Creep Analysis ◽  
Very High

Analysis of creep stress-strain relationships is made for horizontally supported furnace tubes including the effect of tube weight and internal pressure. Steady-state creep effects through the tube wall due to axially symmetrical heal input are also analyzed for these conditions. The original Bailey approach to the pressure problem only is extended to the larger scope undertaken. Maximum permissible tube spans are derived based on accepted criteria for creep stress and deflections. The results of this work indicate that maximum allowable tube spans may often be theoretically increased beyond present usual design limits except for a few specific materials and instances where short spans are required at very high temperatures. In actual tube design, consideration should be given to experience in operation of any particular type of furnace so that secondary effects may be minimized. Increased economies in costs and flexibility in furnace layout as well as rational span determination are expected from use of these results.

Steady-State Creep Analysis of Functionally Graded Rotating Cylinder

Strain ◽  
2013 ◽  
Vol 49 (6) ◽  
pp. 457-466
Author(s):  
S. K. Mangal ◽  
N. Kapoor ◽  
T. Singh
Keyword(s):  
Steady State ◽  
Rotating Cylinder ◽  
Functionally Graded ◽  
Steady State Creep ◽  
Creep Analysis

Modeling creep in a variable thickness rotating FGM disc under varying thermal gradient

2015 ◽  
Vol 32 (5) ◽  
pp. 1230-1250 ◽  
Author(s):  
Manish Garg ◽  
B S Salaria ◽  
V K Gupta
Keyword(s):  
Steady State ◽  
Creep Behavior ◽  
Thermal Gradient ◽  
Yield Criterion ◽  
Pure Aluminum ◽  
Radial Distance ◽  
Functionally Graded ◽  
Steady State Creep ◽  
Strain Rates ◽  
Content Type

Purpose – The purpose of this paper is to investigate steady state creep behavior of a functionally graded rotating disc under varying thermal gradient (TG). Design/methodology/approach – The steady state creep in a rotating FGM disc with linearly varying thickness has been investigated by using von-Mises yield criterion. The disc under investigation is assumed to be made of FGM containing non-linear distribution of silicon carbide particle (SiCp) in a matrix of pure aluminum along the radial distance. The creep behavior of the FGM composite disc is described by threshold stress-based law. The stresses and strain rates in the FGM disc have been estimated for different kinds of TG. Findings – The results indicate that when the FGM disc is subjected to a radial TG, with temperature increasing with increasing radius, the radial stress in the disc increases over the entire disc but the tangential and effective stresses increase near the inner radius and decrease toward the outer radius. The imposition of such a radial TG in the FGM disc leads to significant reduction in the radial and tangential strain rates. With the increase in magnitude of TG in the FGM disc, the inhomogeneity in creep stresses increases but the inhomogeneity in strain rates decreases significantly, thereby reducing the chances of distortion in the FGM disc. Originality/value – The creep strain rates in rotating FGM disc could be significantly reduced when the disc is subjected to a radial TG, with temperature increasing with increasing radius.

Effect of Disc Geometry on the Steady State Creep in a Rotating Disc Made of Functionally Graded Materials

2012 ◽  
Vol 736 ◽  
pp. 183-191 ◽  
Author(s):  
Manish Garg ◽  
B.S. Salaria ◽  
V.K. Gupta
Keyword(s):  
Steady State ◽  
Creep Behaviour ◽  
Pure Aluminum ◽  
Functionally Graded ◽  
Steady State Creep ◽  
Strain Rates ◽  
Rotating Disc ◽  
Graded Materials ◽  
Functionally Graded Composite ◽  
Silicon Carbide Particles

The steady state creep behaviour of a rotating FGM disc having linearly varying thickness has been investigated. The disc is assumed to be made of functionally graded composite containing non-linearly varying radial distribution of silicon carbide particles in a matrix of pure aluminum. The creep behaviour of the composite has been described by threshold stress based law. The effect of varying the disc thickness gradient has been analyzed on the stresses and strain rates in the FGM disc. It is observed that the radial and tangential stresses induced in the FGM disc decrease throughout with the increase in thickness gradient of the disc. The strain rates also decrease with the increase in thickness gradient of the FGM disc, with a relatively higher decrease near the inner radius. The increase in disc thickness gradient results in relatively uniform distribution of strain rates and hence reduces the chances of distortion in the disc.

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