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Effects of variable amplitude fatigue on delamination and crack growth rate models

Load history effects in fatigue-driven delamination in fibre-reinforced polymer composites are neglected in state-of-the-art non-interaction models although this assumption highly underestimates the delamination growth under variable amplitude (VA) loading. A new phenomenon called “transient delamination growth” has been observed in recent VA fatigue experiments by the authors [1-3]. This phenomenon is a transient phase with a significantly increased crack growth rate that follows load amplitude changes in VA load spectra. In this presentation the transient delamination growth is characterised from block loading experiments and the phenomenological behaviours are integrated in a new crack growth rate (CGR) model for prediction of delamination under multi-level block loading.

7245.mp4 7245.mp3

9

http://hdl.handle.net/10256/23115

Universitat de Girona. Grup de Recerca en Anàlisi i Materials Avançats per al Disseny Estructural (AMADE)

Author: Mosbjerg Jensen, Simon
Date: 2023 May 31
Abstract: Load history effects in fatigue-driven delamination in fibre-reinforced polymer composites are neglected in state-of-the-art non-interaction models although this assumption highly underestimates the delamination growth under variable amplitude (VA) loading. A new phenomenon called “transient delamination growth” has been observed in recent VA fatigue experiments by the authors [1-3]. This phenomenon is a transient phase with a significantly increased crack growth rate that follows load amplitude changes in VA load spectra. In this presentation the transient delamination growth is characterised from block loading experiments and the phenomenological behaviours are integrated in a new crack growth rate (CGR) model for prediction of delamination under multi-level block loading.
7245.mp4 7245.mp3
9
Format: audio/mpeg
video/mp4
Document access: http://hdl.handle.net/10256.1/7245
Language: eng
Publisher: Universitat de Girona. Grup de Recerca en Anàlisi i Materials Avançats per al Disseny Estructural (AMADE)
Collection: CompTest 2023
See also: http://hdl.handle.net/10256/23115
Rights: Attribution-NonCommercial-ShareAlike 4.0 International
Rights URI: http://creativecommons.org/licenses/by-nc-sa/4.0/
Subject: Assaigs de materials -- Congressos
Materials -- Testing -- Congresses
Resistència de materials -- Congressos
Strength of materials -- Congresses
Plàstics reforçats amb fibra de carboni -- Congressos
Carbon fiber-reinforced plastics -- Congresses
Mecànica de fractura -- Congressos
Fracture mechanics -- Congresses
Materials compostos -- Fractura -- Congressos
Composite materials -- Fracture -- Congresses
Materials laminats -- Congressos
Laminated materials -- Congresses
Title: Effects of variable amplitude fatigue on delamination and crack growth rate models
Type: info:eu-repo/semantics/lecture
Repository: DUGiMedia

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