Probabilistic simulation of fatigue damage and life scatter of metallic components

Document Type

Article

Publication Date

4-1-2013

Abstract

A three-dimensional (3D) finite element model (FEM) is developed to predict the progressive fatigue damage with provision for stochastic distribution of material properties. Fatigue damage model for low and high cycle fatigue considering plastic deformation is implemented in the FEM and the results are presented for Al 6061-T6, Al 7075-T6, Ti 6Al-4V and SS 316. Comparisons of the numerical and experimental results of stress-life reveal the validity of the approach. Also presented is the result of an investigation showing the effect of element types, element size, variation of material properties, and initial flaws on the randomness of fatigue life. The present fatigue damage simulation allows determining the scatter lifespan of mechanical components subjected to low and high cycle fatigue loading. © 2012 Elsevier Ltd. All rights reserved.

Publication Source (Journal or Book title)

International Journal of Plasticity

First Page

101

Last Page

115

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