Titanium alloy corrosion fatigue crack growth rates prediction: Peridynamics based numerical approach

Karpenko, O.; Oterkus, Selda; Oterkus, Erkan

doi:10.1016/j.ijfatigue.2022.107023

Titanium alloy corrosion fatigue crack growth rates prediction

Title

Titanium alloy corrosion fatigue crack growth rates prediction: Peridynamics based numerical approach

Author

Karpenko, O. (TU Delft Steel & Composite Structures; University of Strathclyde)
Oterkus, Selda (University of Strathclyde)
Oterkus, Erkan (University of Strathclyde)

Date

2022

Abstract

This study presents a numerical approach for modelling the Corrosion Fatigue Crack Growth (CFCG) in conventional casting and additively manufactured Ti6Al4V alloys. The proposed numerical model, based on Peridynamics (PD), combines the PD Fatigue Crack Growth (FCG) model and PD diffusion model in order to couple the mechanical and diffusion fields existing in the material due to the impact of environmental fatigue. The mechanical field is responsible for the characterisation of the changes to the structure due to the fatigue loading conditions. The diffusion field is based on the modelling of the adsorbed-hydrogen Stress Corrosion Cracking (SCC), in particular, the Hydrogen Embrittlement (HE) model is considered. The proposed approach has been validated using experimental data available in the literature showing the capability of the tool to predict the CFCG rates.

Subject

Additive Manufacturing
Corrosion fatigue
Crack growth prediction
Hydrogen Embrittlement
Peridynamics
Stress corrosion cracking

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http://resolver.tudelft.nl/uuid:764a68a7-6dd9-4d83-bf8a-eea9f091ce18

DOI

https://doi.org/10.1016/j.ijfatigue.2022.107023

ISSN

0142-1123

Source

International Journal of Fatigue, 162

Part of collection

Institutional Repository