An application of a phenomenological triple mechanism driven direct cyclic fatigue analysis in composites

Composite fatigue failure in GFRP CT specimen

Master thesis (2020)

Authors

A.J. Verhoeven Civil Engineering & Geosciences

Contributors

M. Pavlovic Steel & Composite Structures - CEG (mentor)
F.P. van der Meer Applied Mechanics - CEG (graduation committee member)
W. Feng Steel & Composite Structures - CEG (coach)
Faculty
Civil Engineering & Geosciences, Civil Engineering & Geosciences
Copyright: © 2020 Alexander Verhoeven
More Info
expand_more

Published Date

26-10-2020

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Civil Engineering & Geosciences

Abstract

In off-shore structures, the jacket foundations are mainly welded connections in circular hollow sections. These connections exhibit problems in resisting fatigue load. Wrapped composite joints tackle this problem with improved fatigue resistance. However, the material properties are yet unknown. In order to determine the properties on a more fundamental manner chosen than just testing different layups for different scaled experiments. This fundamental manner follows the procedure of identifying the mechanisms and their effect on the composite material. The main effect that will be considered of each mechanism is the stiffness degradation over time in order to determine the fatigue life. For now, the effects of the three (most) significant mechanisms are modelled for a glass fibre reinforced composite layup of a compact tension specimen. These effects are modelled using the plasticity model for inter fibre failure, the virtual crack closure technique for delamination and the ductile damage model for fibre failure.