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hilditch-fatiguelifeprediction-2022.pdf (1.94 MB)

Fatigue life prediction of the additively manufactured specimen

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Version 2 2024-06-03, 12:34
Version 1 2021-12-31, 14:32
journal contribution
posted on 2024-06-03, 12:34 authored by SK Paul, F Tarlochan, Tim HilditchTim Hilditch
Abstract Additively manufactured specimens generally exhibit comparable or improved tensile properties, such as yield stress, ultimate tensile strength, and uniform elongation, compared to conventionally manufactured specimens. However, the defects that are typically present in additively manufactured microstructures result in inferior fatigue performance. A representative volume element-based modeling technique incorporating these defects has been used to predict the reduction in endurance limit of an additively manufactured stainless steel compared to the conventionally manufactured material. This physics-based model can clearly demonstrate the poor fatigue performance of additively manufactured specimens based on the micro-plasticity generated by the defects in the microstructure under cyclic loading. A Neuber analytical model has also been applied to predict the fatigue life of additively manufactured materials for a given stress amplitude. Both the prediction from the finite element model and the analytical Neuber model are very close to the experimental endurance limit.

History

Journal

Modelling and Simulation in Materials Science and Engineering

Volume

30

Article number

ARTN 015004

Pagination

1-16

Location

Bristol, Eng.

Open access

  • Yes

ISSN

0965-0393

eISSN

1361-651X

Language

English

Publication classification

C1 Refereed article in a scholarly journal

Issue

1

Publisher

IOP Publishing