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A method for the evaluation of a ratchet limit and the amplitude of plastic strain for bodies subjected to cyclic loading

โœ Scribed by Haofeng Chen; Alan R.S Ponter

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
337 KB
Volume
20
Category
Article
ISSN
0997-7538

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โœฆ Synopsis

An extension of the upper bound shakedown theorem to load histories in excess of shakedown has been presented elsewhere in this issue. Here the minimisation process described therein is applied to the solutions of the ratchet limit as well as shakedown and limit load for a range of simple problems. The solutions provide an estimate of the maxima of the varying plastic strain magnitudes, which is compared with the Neuber approximate values. The position of the ratchet boundary is confirmed by comparison step-by-step analysis.

๐Ÿ“œ SIMILAR VOLUMES

A minimum theorem for cyclic load in exc
A minimum theorem for cyclic load in excess of shakedown, with application to the evaluation of a ratchet limit
โœ Alan R.S Ponter; Haofeng Chen ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 102 KB

Although the shakedown theorems for perfect plasticity have been known since Koiter's 1960 review paper, extensions of the theory to situations where ratchetting or reverse plasticity occurs in excess of shakedown have not appeared in the literature. In this paper a generalisation of the upper bound

A method for the evaluation of design li
A method for the evaluation of design limits for structural materials in a cyclic state of creep
โœ Mostapha Boulbibane; Alan R.S. Ponter ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 316 KB

The purpose of the present paper is to demonstrate how the minimum theorems proposed in an accompanying paper (Ponter and Boulbibane, 2002) can be utilised in the prediction of the deformation and life assessment of structures subjected to cyclic mechanical and thermal loadings. The developed method