A Stochastic Model for Assessment of Creep damage

Roy, Nilima and Ghosh, R N and Bose, S C and Swaminathan, J (2007) A Stochastic Model for Assessment of Creep damage. Exploratory (OLP). CSIR-NML, Jamshdpur. (Submitted)

[img]PDF
Restricted to Repository staff only

448Kb

Abstract

Experimental investigations on the creep behaviour of engineering materials are frequently conducted for the purposes of design, development and service life prediction. However, tests on a single specimen yield a definite value for each material parameter. But when a number of specimens are tested, the parameter values randomly fluctuate from specimen to specimen. The scatter observed in creep deformation and failure data is of considerable technological importance because it greatly complicates the task of making accurate deformation and lifetime estimates for high temperature components. Several studies, employing theory of probability concepts have been developed to predict and characterize the variations in creep damage parameter. So far the deterministic approach has been used which is based on only two limiting states of the material i.e., ω= 0, no damage and ω = 1, completely damaged. This imposes severe limitations on the validity and practical applications of this model. For instance, it is not possible to trace the damage accumulation during service using the NDT techniques.

Item Type:Project Reports (Exploratory (OLP))
Official URL/DOI:http://eprints.nmlindia.org/5703
Uncontrolled Keywords:Creep damage; Stochastic Model
Divisions:Material Science and Technology
ID Code:5703
Deposited By:Dr. A K Sahu
Deposited On:04 Jul 2012 15:35
Last Modified:04 Jul 2012 15:35
Related URLs:

Repository Staff Only: item control page