cover

Domagoj Rubesa:

Lifetime prediction and constitutive modelling for creep-fatigue interaction

1996. 151 pages, 35 figures, 4 tables, 15x21cm, 300 g
Language: English

(Materialkundlich-Technische Reihe, Band 13)

ISBN 978-3-443-23015-9, paperback, price: 33.00 €

in stock and ready to ship

Order form

BibTeX file

Keywords

creepfatiquelife timemetalpredictionKriechenMüdigkeitLebenszeitPrognose

Contents

Synopsis top ↑

The phenomena of creep, fatigue and creep-fatigue interaction in metallic materials are reviewed and studied with respect to the underlying physical processes.
Different approaches and methods of lifetime prediction for the regime of creep- fatigue interaction are critically reviewed, particularly from the point of view of damage mechanics. Because of the clear need for constitutive modelling of the mechanical behaviour of a material at high temperatures in conjunction with lifetime prediction, the principles and concepts of constitutive modelling are explained. Special emphasis is placed on one particular, as yet little used lifetime prediction rule for the creep-fatigue interaction regime (developed at the University of Leoben in Austria several years ago), based on the principle of linear accumulation of strain rate modified creep damage (the SRM rule). It is shown that the application of this rule supported by a suitable constitutive model of viscoplasticity substantially reduces the amount of experimental data required for lifetime prediction. This method of lifetime prediction in the creep-fatigue interaction regime is shown to be practicable and reliable for most general cases of variable loading.

The book may be especially useful to those students and engineers who should get knowledge of two aspects of this topic as the book contains an analysis of the basic principles and assumptions of the mathematical modelling of the mechanical behaviour of a material and relates this to the metallurgical background of the processes of deformation, evolution of damage and failure.

Table of Contents top ↑

List of symbols (p.5)
1 introduction (p. 11 )
2 Review and approach to the problem (p. 13)
2.1 The creep-fatigue interaction regime
2.2 Isothermal high-temperature fatigue and thermal fatigue
2.3 Uncoupled modelling of deformation and damaging processes and a local
approach to lifetime prediction
2.4 Lifetime prediction in the range of creep-fatigue interaction
2.5 Constitutive modelling in conjunction with lifetime prediction
3 Creep phenomena and their mathematical modelling (p. 20)
3.1 The phenomenology of creep
3.2 Creep deformation mechanisms
3.3 Constitutive modelling of creep
3.4 Characterization of creep damage and fracture mechanisms
3.5 Assessment of time to failure in creep conditions
4 Cyclic loading and fatigue (p. 55)
4.1 Deformation behaviour under cyclic loading
4.2 Fatigue damage and failure
4.3 Prediction of cyclic life
5 Constitutive modelling of viscoplasticity (p. 86)
5.1 The need for and the demands on constitutive modelling in conjunction with
the lifetime prediction
5.2 The principles and problems associated with the constitutive modelling of
viscoplasticity
5.3 Chaboche's viscoplastic constitutive model
6 Lifetime prediction in the creep-fatigue interaction regime by the SRM rule
supported by a suitable constitutive model (p. 95)
6.1 The SRM method of lifetime prediction
6.2 The algorithm for the prediction of lifetime by the SRM rule supported
with Chabo che's viscoplastic constitutive model
6. Application and verification of the method
References (p. 135)
Appendix A Geometry of finite elastic-inelastic deformations (p. 147)
Appendix B A solution of an initial value problem for a differential equation
with separable variables (p. 153)