Sage Journals: Discover world-class research

Abstract

Many components in conventional and nuclear power plant and chemical plant are subjected to steady mechanical and cyclic thermal loads. The life of such components may be governed by the accumulation of inelastic strain and/or deformation (i.e., ratcheting).

Elasto-plastic finite-element results for a circular plate with radially movable, direction fixed edges, subjected to steady membrane loads, steady transverse pressure loads, and cyclic through-thickness thermal loads, are given. A temperature independent, elasticperfectly plastic material model is assumed. Plastic strains are governed by the von-Mises effective stress criterion and the Prandtl-Reuss flow rule. Cyclic hardening (or softening) effects are not considered. The results are compared with the Miller-Bree uniaxial model (1)(2)(3)†

The results have been normalized with respect to the material properties so that they may be applied to plates made from any material which may be represented by the material model.

Get full access to this article

View all access options for this article.

References

Miller

D. R.

‘Thermal stress ratchet mechanisms in pressure vessels. Trans. Am. Soc. mech. Engrs, J. Basic Engng, 1959, 81, 190–194.

Bree

‘Elastic–plastic behaviour of thin tubes subjected to internal pressure and intermittent high-heat fluxes with application to fast-nuclear-reactor fuel elements’, J. Strain Anal., 1967, 2, 226–238.

Bree

‘Incremental growth due to creep and plastic yielding of thin tubes subjected to internal pressure and cyclic thermal stresses’, J. Strain Anal., 1968, 3, 122–127.

Carter

Wood

M. B.

‘Some problems of high temperature design’, IMechE Conference on Experience of structural validation in the nuclear industry, with emphasis on high temperature design, 25th October 1979, pp. 45–59.

Leckie

F. A.

‘A review of bounding techniques in shakedown and ratcheting at elevated temperature, W.R.C. Bull., June 1974, 195.

Dwivedi

V. S.

Fessler

Hyde

T. H.

Webster

J. J.

‘Thermal ratcheting of a hollow stepped cylinder’. Nonlinear problems in stress analysis, Ed. Stanley

, 1978 (Applied Science Publishers, London), pp. 299–316.

Goodman

A. M.

‘Incremental plastic deformation of a cylinder subjected to cyclic thermal loading’. Nonlinear problems in stress analysis, Ed. Stanley

, 1978 (Applied Science Publishers, London), pp. 317–344.

Fessler

Hyde

T. H.

Webster

J. J.

‘Some tensile, creep, and plasticity/creep interaction data for the lead alloy which is to be used for the shouldered tube tests’, 3rd progress report to S.R.C. on Creep and Plasticity Interaction, B/RG/7699.4, June 1978.

Henshell

R. D.

(Ed.), PAFEC 70+ Manual, 1972, Department of Mechanical Engineering, University of Nottingham.

10.

Dawson

R. J.

Fessler

Hyde

T. H.

Webster

J. J.

‘Elasto-plastic and creep behaviour of axially loaded, shouldered tubes’, J. Strain Anal., 1980, 15, 21–29.

The effect of transverse pressure loading on the thermal ratcheting of circular plates

Abstract

Abstract

Get full access to this article

References