Finite element modelling of UHPC under pulsating load using X-ray computed tomography based fiber distributions

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dc.contributor.authorMellios, Nikolaos
dc.contributor.authorOesch, Tyler
dc.contributor.authorSpyridis, Panagiotis
dc.date.accessioned2022-03-14T14:45:27Z
dc.date.available2022-03-14T14:45:27Z
dc.date.issued2021-12-18
dc.description.abstractThe benefits of including fibers in ultra-high performance concrete (UHPC) are attributed to their good bond with the matrix and, hence, an optimal utilization of their properties. At the same time, though, fiber reinforcement may contribute to anisotropy in the composite material and induce weak areas. The influence of the fibers’ orientation on the material properties is a matter of current scientific discourse and it is known to play a vital role in structural design. In the case studies presented herein, mechanical laboratory tests using pulsating load regimes on UHPC with a strength of more than 200 MPa were simulated by use of finite element models. The orientations of the fibers were measured for each test sample prior to failure using an X-ray computed tomography (CT) scanner, and these orientations are explicitly implemented into the model. The paper discusses the methodology of merging data retrieved by CT image processing and state-of-the-art FE simulation techniques Moreover, the CT scanning was carried out throughout the testing procedure, which further enables the comparison of the mechanical tests and the FE models in terms of damage propagation and failure patterns. The results indicate that the overall fiber configuration and behavior of the samples can be realistically modelled and validated by the proposed CT-FE coupling, which can enhance the structural analysis and design process of elements produced with steel fiber reinforced and UHPC materials.en
dc.identifier.urihttp://hdl.handle.net/2003/40789
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-22646
dc.language.isoende
dc.relation.ispartofseriesMaterials and structures;Vol. 55. 2022, Art. No 1
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectUltra-high performance concreteen
dc.subjectSteel fiber reinforced concreteen
dc.subjectFiber orientationen
dc.subjectX-ray computed tomographyen
dc.subjectNon-linear finite element modellingen
dc.subject.ddc690
dc.titleFinite element modelling of UHPC under pulsating load using X-ray computed tomography based fiber distributionsen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationMaterials and structures. Vol. 55. 2022, Art. No 1de
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1617/s11527-021-01833-4de

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