A Method for the Prediction of Fatigue Life of Notched Metallic Material

Xin Lin

doi:10.4028/www.scientific.net/AMR.915-916.557

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 915-916A Method for the Prediction of Fatigue Life of...

A Method for the Prediction of Fatigue Life of Notched Metallic Material

Abstract:

The traditional methods for the prediction of fatigue life of metallic material consider only the two processes of fatigue initiation and fatigue cracking, while the process from fatigue cracking to breaking has been neglected. This paper provides one new method of estimating the fatigue life of under-constant-amplitude loading spectrum---non-local gradient damage enhancement model method. Based on the finite element procedure and the partial damage model, this method inserts the non-local strain's definition formula into the loading function and damage rate increment formula. From this method, the non-partial gradient enhancement damage model is obtained. In this model, the material’s microscopic criterion factor and the material’s damage criterion have been considered, the process of endurance failure is also considered. Thus, the insufficiency of traditional research techniques is effectively avoided, the actual effect analysis of metallic material is more reasonable, and the actual operating mode is been conformed to.

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Periodical:

Advanced Materials Research (Volumes 915-916)

Pages:

557-561

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.915-916.557

Citation:

Cite this paper

Online since:

April 2014

Authors:

Xin Lin

Keywords:

Fatigue Crack, Fatigue Life, Finite Element, Non-Local Gradient Enhancement Damage Model

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