Fatigue Life Prediction of Notched Specimen under Multiaxial Cyclic Loading

Abstract:

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The stress-strain response at notch root for notched specimen was computed by elastic-plastic finite element analysis (FEA) under multiaxial loading for GH4169. A uniform gouge length of the specimen was selected as the dimension of the FE model. The uniaxial fatigue data were used to describe the stress-strain curve. One cycle is divided to different load steps according to phase difference. Tension-torsion strain cyclic loading was implemented in FEA. Fatigue crack initiation life was predicted by Smith-Watson-Topper model, Shang-Wang and Sun-Shang models with the calculated stress-strain data at notch root. The result shows that the three models are suitable for life prediction of notched specimen under multiaxial cyclic loading for GH4169 alloy.

Info:

Periodical:

Advanced Materials Research (Volumes 228-229)

Edited by:

Quanjie Gao

Pages:

672-675

DOI:

10.4028/www.scientific.net/AMR.228-229.672

Citation:

G. Q. Sun and D. G. Shang, "Fatigue Life Prediction of Notched Specimen under Multiaxial Cyclic Loading", Advanced Materials Research, Vols. 228-229, pp. 672-675, 2011

Online since:

April 2011

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Price:

$35.00

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