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On the progressive fatigue failure of mechanical composite joints: Numerical simula-tion and experimental validation

Gerendt, Christian and Dean, Aarmir and Mahrholz, Thorsten and Englisch, Nils and Krause, Stefan and Rolfes, Raimund (2020) On the progressive fatigue failure of mechanical composite joints: Numerical simula-tion and experimental validation. Composite Structures, 248, p. 112488. Elsevier. doi: 10.1016/j.compstruct.2020.112488. ISSN 0263-8223.

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In this study, a novel holistic progressive damage model for mechanical fiber-reinforced polymer (FRP) joints under static and fatigue loading is presented. The model is implemented as a user-defined subroutine in the finite element software ABAQUS/Implicit. First, the theoretical basis of both the static and the fatigue damage model are explained in detail. Here, special emphasis is put on the introduction of the FRP fatigue damage model (FDM), which is based on a physically-motivated hypothesis enabling the consistent coupling of static and fatigue damage properties. Furthermore, detailed insights concerning the experimental calibration of the FDM are presented for the first-time. Subsequently, the presented damage model is validated using first-hand experimental results for standard bolt bearing, as well as T-bolt bearing, test setups. The experimental bearing setups are tested and analyzed until ultimate failure, applying static and fatigue loading. It is shown that the model prognoses are in close accordance with experimental measurements and observations in terms of static joint strength, cyclic stiffness degradation and cycles to failure. The rich information provided by the damage model concerning the progressive damage evolution under static and fatigue loading conditions allows for its application within virtual test rigs for mechanical FRP joints. In that context, this work demonstrates the promising abilities and features of the energy hypothesis applied for the FDM for use-cases of significant relevance in the composite industry for the first time in literature.

Item URL in elib:https://elib.dlr.de/139208/
Document Type:Article
Title:On the progressive fatigue failure of mechanical composite joints: Numerical simula-tion and experimental validation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gerendt, ChristianISD, Uni HannoverUNSPECIFIED
Dean, AarmirISD, Uni HannoverUNSPECIFIED
Mahrholz, ThorstenThorsten.Mahrholz (at) dlr.dehttps://orcid.org/0000-0003-1488-0910
Englisch, NilsIWES, FhG BremerhavenUNSPECIFIED
Krause, StefanIWES, FhG BremerhavenUNSPECIFIED
Rolfes, RaimundISD, Uni HannoverUNSPECIFIED
Journal or Publication Title:Composite Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.compstruct.2020.112488
Page Range:p. 112488
EditorsEmailEditor's ORCID iD
Keywords:Continuum damage modeling, Experimental validation, Fiber reinforced polymers, Mechanical joints, Progressive fatigue damage prediction
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Mahrholz, Dr.rer.nat. Thorsten
Deposited On:10 Dec 2020 10:02
Last Modified:23 Jul 2022 13:45

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