Article ID Journal Published Year Pages File Type
790998 International Journal of Pressure Vessels and Piping 2008 9 Pages PDF
Abstract

A companion paper [Bolton J. In: A characteristic-strain model for creep, ECCC/I.Mech.E. conference on creep and fracture in high-temperature components, London, September 2005] describes a creep model based on a constant “characteristic strain” at any temperature. The present paper discusses the application of such a model, first to simple structures and then to engineering components of general form under steady loading. A basis is proposed for identifying the stress within a structure, or within the critical part of a structure, which can be considered to govern both its overall and local deformations. The concept is similar to skeletal-point stress but is more readily applied to components of any shape.The implementation of the concept of “structural stress” is discussed in the context of finite-element creep calculations. Consideration is given to the analysis of cracked structures, where very high strains at the crack tip must be accommodated.

Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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