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Summary of metal fatigue life prediction methods

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Document pages: 26 pages

Abstract: Metal materials are widely used in engineering structures, and fatigue failure is one of the most common failure modes of metal structures. When the material is subjected to fluctuating stress and strain, fatigue will occur, which will lead to failure due to damage accumulation. Different methods, including palmgren Miner linear damage rule (LDR -), multiaxial and variable amplitude loads, random, energy and continuous damage mechanics, are used to predict fatigue life. This paper summarizes the fatigue life prediction technology of metal materials. An ideal fatigue life prediction model should include the main characteristics of those established methods, and its implementation in the simulation system can 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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