Cumulative fatigue damage and life prediction theories: a survey of the state of the art for homogeneous materials

Continuous damage mechanics — A tool to describe phenomena before crack initiation

— -A non-linear cumulative fatigue damage model proposed previously is applied to different steels and various loading situations, including two-level tests and block-programs. Its ability to describe all the main features of fatigue damage and the ease of its practical use for engineers are discussed and several examples cited. The relationship with other formulations are pointed out together with the main advantages of the proposed model. A generalization is proposed for both cyclic temperature and multiaxial loading conditions.

A non‐linear continuous fatigue damage model

In this paper the problem of cumulative fatigue damage is considered. On the basis of the invariable succession postulate and the invariable damage postulate, a general form for a one-damage-parameter cumulative-damage model is developed. It has been shown that some of the models previously proposed can be obtained as a particular case of the model derived herein.

Cumulative fatigue damage

Metallic materials are extensively used in engineering structures and fatigue failure is one of the most common failure modes of metal structures. Fatigue phenomena occur when a material is subjected to fluctuating stresses and strains, which lead to failure due to damage accumulation. Different methods, including the Palmgren-Miner linear damage rule- (LDR-) based, multiaxial and variable amplitude loading, stochastic-based, energy-based, and continuum damage mechanics methods, forecast fatigue life. This paper reviews fatigue life prediction techniques for metallic materials. An ideal fatigue life prediction model should include the main features of those already established methods, and its implementation in simulation systems could help engineers and scientists in different applications. In conclusion, LDR-based, multiaxial and variable amplitude loading, stochastic-based, continuum damage mechanics, and energy-based methods are easy, realistic, microstructure dependent, well timed, and damage connected, respectively, for the ideal prediction model.

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J. Dubuc

Papers

Cumulative Fatigue Damage Under Stress-Controlled Conditions

Effect of Mean Stress and of Mean Strain in Low-Cycle Fatigue of A-517 and A-201 Steels

Evaluation of pressure vessel design criteria for effect of mean stress in low-cycle fatigue.

Effect of Creep in Low-Cycle Fatigue of Pressure Vessel Steel