Newly proposed yield criterion for residual stress and steady state creep in an anisotropic composite rotating disc

2003 ◽  
Vol 143-144 ◽  
pp. 623-628 ◽  
Author(s):  
S.B. Singh ◽  
S. Ray
Keyword(s):  
Residual Stress ◽  
Steady State ◽  
Yield Criterion ◽  
Steady State Creep ◽  
Rotating Disc ◽  
Anisotropic Composite

EFFECT OF RESIDUAL STRESS AND REINFORCEMENT GEOMETRY IN AN ANISOTROPIC COMPOSITE ROTATING DISC HAVING VARYING THICKNESS

2012 ◽  
Vol 01 (04) ◽  
pp. 1250035
Author(s):  
VANDANA GUPTA ◽  
S. B. SINGH
Keyword(s):  
Residual Stress ◽  
Steady State ◽  
Creep Behavior ◽  
Yield Criterion ◽  
Steady State Creep ◽  
Thermal Residual Stress ◽  
Rotating Disc ◽  
Varying Thickness ◽  
Creep Analysis ◽  
Sic Particle

The influence of the thermal residual stress and reinforcement geometry on the creep behavior of a composite disc has been analyzed in this paper. The creep analysis in a rotating disc made of Al-SiC (particle/whisker) composite having hyperbolically varying thickness has been carried out using anisotropic Hoffman yield criterion and results obtained are compared with those using Hill's criterion ignoring difference in yield stresses. The steady state creep behavior has been described by Sherby's creep law. The creep parameters characterizing difference in yield stresses have been used from the available experimental results in literature. It is observed that the stresses are not much affected by the presence of thermal residual stress, while thermal residual stress introduces significant change in the strain rates in an anisotropic rotating disc. Secondly, it is noticed that the steady state creep rates in whisker reinforced disc with/without residual stress are observed to be significantly lower than those observed in particle reinforced disc with/without residual stress. It is concluded that the presence of residual stress in an anisotropic disc with varying thickness needs attention for designing a disc.

scholarly journals Creep Modeling in a Composite Rotating Disc with Thickness Variation in Presence of Residual Stress

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Vandana Gupta ◽  
S. B. Singh
Keyword(s):  
Residual Stress ◽  
Steady State ◽  
Creep Behavior ◽  
Yield Criterion ◽  
Steady State Creep ◽  
Thickness Variation ◽  
Stress And Strain ◽  
Rotating Disc ◽  
Varying Thickness ◽  
Von Mises

Steady-state creep response in a rotating disc made of Al-SiC (particle) composite having linearly varying thickness has been carried out using isotropic/anisotropic Hoffman yield criterion and results are compared with those using von Mises yield criterion/Hill's criterion ignoring difference in yield stresses. The steady-state creep behavior has been described by Sherby's creep law. The material parameters characterizing difference in yield stresses have been used from the available experimental results in literature. Stress and strain rate distributions developed due to rotation have been calculated. It is concluded that the stress and strain distributions got affected from the thermal residual stress in an isotropic/anisotropic rotating disc, although the effect of residual stress on creep behavior in an anisotropic rotating disc is observed to be lower than those observed in an isotropic disc. Thus, the presence of residual stress in composite rotating disc with varying thickness needs attention for designing a disc.

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.

Steady State Creep of Isotropic Rotating Composite Disc Under Thermal Gradation

2017 ◽  
Vol 09 (06) ◽  
pp. 1750077 ◽  
Author(s):  
Tania Bose ◽  
Minto Rattan ◽  
Neeraj Chamoli
Keyword(s):  
Steady State ◽  
Thermal Gradient ◽  
Elevated Temperatures ◽  
Yield Criterion ◽  
Aluminum Matrix ◽  
Radial Distance ◽  
Outer Radius ◽  
Steady State Creep ◽  
Uniform Temperature ◽  
Silicon Carbide Particulate

An attempt has been made to investigate steady state creep behavior of thermally graded isotropic discs rotating at elevated temperatures. For this purpose, composite discs of aluminum matrix reinforced with silicon carbide particulate have been taken. Modeling of stress and strain rate distributions for discs operating under linear thermal gradient has been done using von Mises’ yield criterion and threshold stress-based creep law. Similarly modeling has been done for discs operating under non-linear thermal gradient. The results are compared with the disc having a uniform temperature profile from inner to outer radius and are displayed graphically in designer friendly format for the said temperature profiles. A small variation is observed for radial and tangential stresses for the said thermal gradations. However, the strain rates vary significantly in the presence of thermal gradations as compared to a disc having uniform temperature throughout the radial distance. Thus, it is observed that there is a need to extend the domain of thermal gradation for designing rotating discs.

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