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dc.contributor.authorMartínez-Pañeda, Emilio
dc.contributor.authorGolahmar, A
dc.contributor.authorNiordson, CF
dc.date.accessioned2018-11-14T00:30:27Z
dc.date.available2018-11-14T00:30:27Z
dc.date.issued2018-12-01
dc.identifier.issn0045-7825
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/285019
dc.description.abstractWe present a phase field modeling framework for hydrogen assisted cracking. The model builds upon a coupled mechanical and hydrogen diffusion response, driven by chemical potential gradients, and a hydrogen-dependent fracture energy degradation law grounded on first principles calculations. The coupled problem is solved in an implicit time integration scheme, where displacements, phase field order parameter and hydrogen concentration are the primary variables. We show that phase field formulations for fracture are particularly suitable to capture material degradation due to hydrogen. Specifically, we model (i) unstable crack growth in the presence of hydrogen, (ii) failure stress sensitivity to hydrogen content in notched specimens, (iii) cracking thresholds under constant load, (iv) internal hydrogen assisted fracture in cracked specimens, and (v) complex crack paths arising from corrosion pits. Computations reveal a good agreement with experiments, highlighting the predictive capabilities of the present scheme. The work could have important implications for the prediction and prevention of catastrophic failures in corrosive environments. The finite element code developed can be downloaded from www.empaneda.com/codes
dc.publisherElsevier BV
dc.titleA phase field formulation for hydrogen assisted cracking
dc.typeArticle
prism.endingPage761
prism.publicationDate2018
prism.publicationNameComputer Methods in Applied Mechanics and Engineering
prism.startingPage742
prism.volume342
dc.identifier.doi10.17863/CAM.32389
dcterms.dateAccepted2018-07-19
rioxxterms.versionofrecord10.1016/j.cma.2018.07.021
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-12-01
dc.contributor.orcidMartínez-Pañeda, Emilio [0000-0002-1562-097X]
dc.contributor.orcidNiordson, CF [0000-0001-6779-8924]
dc.identifier.eissn1879-2138
dc.publisher.urlhttp://dx.doi.org/10.1016/j.cma.2018.07.021
rioxxterms.typeJournal Article/Review
cam.issuedOnline2018-07-25
rioxxterms.freetoread.startdate2019-12-01


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