Cohesive zone modelling of hydrogen environmentally assisted cracking for double cantilever beam samples of 7xxx aluminium alloys

Simple item page
dc.contributor.authorDe Francisco, Unai
dc.contributor.authorLarrosa, Nicolas O.
dc.contributor.authorPeel, Matthew J.
dc.contributor.institutionMATERIALES PARA CONDICIONES EXTREMAS
dc.date.accessioned2024-09-06T08:55:02Z
dc.date.available2024-09-06T08:55:02Z
dc.date.issued2024-10
dc.descriptionPublisher Copyright: © 2024 The Author(s)
dc.description.abstractDouble cantilever beam (DCB) samples are typically used to estimate the crack growth rates during hydrogen environmentally assisted cracking (HEAC) of 7xxx aluminium alloys. In this investigation, a cohesive zone model was developed to simulate the HEAC behaviour of 7xxx alloys during DCB tests. A coupled mass-diffusion and stress analysis was performed in Abaqus to elucidate key parameters affecting crack growth rates via sensitivity analysis. The threshold stress intensity for cracking was mainly dependent on hydrogen solubility, while the stage II crack growth rate was influenced by the mass-transfer coefficient and diffusivity. Model parameters were fitted to match experimental results of AA7449-T7651 at different temperatures, analysing hydrogen distribution within the samples. Results indicated that hydrogen concentration at external and fractured surfaces remained at saturation levels throughout the tests. The postulated crack propagation mechanism involves enhanced hydrogen diffusion near the crack tip due to a high hydrogen concentration gradient, crack growth driven by hydrogen accumulation, and enhanced hydrogen ingress at newly formed surfaces.en
dc.description.statusPeer reviewed
dc.identifier.citationDe Francisco , U , Larrosa , N O & Peel , M J 2024 , ' Cohesive zone modelling of hydrogen environmentally assisted cracking for double cantilever beam samples of 7xxx aluminium alloys ' , Theoretical and Applied Fracture Mechanics , vol. 133 , 104604 . https://doi.org/10.1016/j.tafmec.2024.104604
dc.identifier.doi10.1016/j.tafmec.2024.104604
dc.identifier.issn0167-8442
dc.identifier.urihttps://hdl.handle.net/11556/4814
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85201450753&partnerID=8YFLogxK
dc.language.isoeng
dc.relation.ispartofTheoretical and Applied Fracture Mechanics
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subject.keywordsAluminium alloys
dc.subject.keywordsCohesive zone model
dc.subject.keywordsDouble cantilever beam
dc.subject.keywordsHydrogen environmentally assisted cracking
dc.subject.keywordsGeneral Materials Science
dc.subject.keywordsCondensed Matter Physics
dc.subject.keywordsMechanical Engineering
dc.subject.keywordsApplied Mathematics
dc.titleCohesive zone modelling of hydrogen environmentally assisted cracking for double cantilever beam samples of 7xxx aluminium alloysen
dc.typejournal article
Files