A comprehensive finite element framework for the progressive damage analysis of fiber metal laminate bolted joints under static and cyclic loading: theory and experimental validation

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Gerendt, C.: A comprehensive finite element framework for the progressive damage analysis of fiber metal laminate bolted joints under static and cyclic loading: theory and experimental validation. Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021. DOI: https://doi.org/10.15488/11382

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Sum total of downloads: 70

To improve the robustness of fiber-reinforced plastics (FRP) in bolted joints, local metal-hybridization of the FRP laminate can be performed to obtain an FRP-based fiber metal laminate (FML) of increased bearing strength. This contribution presents the first modeling framework able to predict the entire fatigue degradation process of such FRP-based FML bolted joints from damage initiation until ultimate failure, including the safety-relevant bolted joint failure mode. For this purpose, each laminate constituent material (i.e. metallic inlays and FRP plies) is analyzed by an own physically motivated continuum damage model. To predict the fatigue crack initiation and growth in the metallic inlays, the framework deploys a newly developed continuum damage approach, which uses a cyclic elasto-plastic strain energy increment as primary fatigue metric. Based on its constitutive equations, the inlay damage model is able to predict a fatigue crack’s location and growth direction, both in the low- and the high-cycle fatigue regime. To account for the fatigue damage of the FRP plies, an energy-based fatigue damage approach forFRP composites, recently presented and validated by the authors, is applied. A comprehensive damage assessment is achieved as both fatigue models are accompanied by respective static damage models. The algorithms are implemented as one user-material (UMAT) subroutine in the commercial finite elementsoftware ABAQUS/Implicit. After the separate validation of the inlay damage model, the FML damage modeling framework is validated for open hole tension and T-bolt joint setups.
License of this version: CC BY 3.0 DE
Document Type: Article
Publishing status: submittedVersion
Issue Date: 2021
Appears in Collections:Fakultät für Bauingenieurwesen und Geodäsie

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pos. country downloads
total perc.
1 image of flag of Germany Germany 45 64.29%
2 image of flag of United States United States 5 7.14%
3 image of flag of Hong Kong Hong Kong 4 5.71%
4 image of flag of India India 3 4.29%
5 image of flag of China China 3 4.29%
6 image of flag of Netherlands Netherlands 2 2.86%
7 image of flag of United Kingdom United Kingdom 2 2.86%
8 image of flag of Spain Spain 2 2.86%
9 image of flag of Korea, Republic of Korea, Republic of 1 1.43%
10 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 1 1.43%
    other countries 2 2.86%

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