Evaluation and modeling of the fatigue damage behavior of polymer composites at reversed cyclic loading

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dc.identifier.uri http://dx.doi.org/10.15488/10371
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/10445
dc.contributor.author Koch, Igor
dc.contributor.author Just, Gordon
dc.contributor.author Brod, Martin
dc.contributor.author Chen, Jiuheng
dc.contributor.author Doblies, Audrius
dc.contributor.author Dean, Aamir
dc.contributor.author Gude, Maik
dc.contributor.author Rolfes, Raimund
dc.contributor.author Hopmann, Christian
dc.contributor.author Fiedler, Bodo
dc.date.accessioned 2021-02-04T08:11:53Z
dc.date.available 2021-02-04T08:11:53Z
dc.date.issued 2019
dc.identifier.citation Koch, I.; Just, G.; Brod, M.; Chen, J.; Doblies, A. et al.: Evaluation and modeling of the fatigue damage behavior of polymer composites at reversed cyclic loading. In: Materials 12 (2019), Nr. 11, 1727. DOI: https://doi.org/10.3390/ma12111727
dc.description.abstract Understanding the composite damage formation process and its impact on mechanical properties is a key step towards further improvement of material and higher use. For its accelerated application, furthermore, practice-related modeling strategies are to be established. In this collaborative study, the damage behavior of carbon fiber-reinforced composites under cyclic loading with load reversals is analyzed experimentally and numerically. The differences of crack density evolution during constant amplitude and tension-compression block-loading is characterized with the help of fatigue tests on cross-ply laminates. For clarifying the evolving stress-strain behavior of the matrix during static and fatigue long-term loading, creep, and fatigue experiments with subsequent fracture tests on neat resin samples are applied. The local stress redistribution in the composite material is later evaluated numerically using composite representative volume element (RVE) and matrix models under consideration of viscoelasticity. The experimental and numerical work reveals the strong influence of residual stresses and the range of cyclic tension stresses to the damage behavior. On the microscopic level, stress redistribution dependent on the mean stress takes place and a tendency of the matrix towards embrittlement was found. Therefore, it is mandatory to consider stress amplitude and means stress as inseparable load characteristic for fatigue assessment, which additionally is influenced by production-related and time-dependent residual stresses. The phenomenological findings are incorporated to a numerical simulation framework on the layer level to provide an improved engineering tool for designing composite structures. © 2019 by the authors. eng
dc.language.iso eng
dc.publisher Basel : MDPI AG
dc.relation.ispartofseries Materials 12 (2019), Nr. 11
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject Block-loading eng
dc.subject Fatigue eng
dc.subject FRP eng
dc.subject Load reversal eng
dc.subject Modeling eng
dc.subject Residual stresses eng
dc.subject.ddc 600 | Technik ger
dc.title Evaluation and modeling of the fatigue damage behavior of polymer composites at reversed cyclic loading
dc.type article
dc.type Text
dc.relation.issn 1996-1944
dc.relation.doi https://doi.org/10.3390/ma12111727
dc.bibliographicCitation.issue 11
dc.bibliographicCitation.volume 12
dc.bibliographicCitation.firstPage 1727
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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