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A computationally-efficient micromechanical model for the fatigue life of unidirectional composites under tension-tension loading
File | Description | Size | Format | |
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2018x Alves and Pimenta - Fatigue model for longitudinal tension.pdf | Accepted version | 4.31 MB | Adobe PDF | View/Open |
Title: | A computationally-efficient micromechanical model for the fatigue life of unidirectional composites under tension-tension loading |
Authors: | Alves, M Pimenta, S |
Item Type: | Journal Article |
Abstract: | Failure of fibre-reinforced composites is affected by fatigue, which increases the challenge in designing safe and reliable composite structures. This paper presents an analytical model to predict the fatigue life of unidirectional composites under longitudinal tension-tension. The matrix and fibre-matrix interface are represented through a cohesive constitutive law, and a Paris law is used to model fatigue due to interfacial cracks propagating from fibre-breaks. The strength of single-fibres is modelled by a Weibull distribution, which is scaled hierarchically though a stochastic failure analysis of composite fibre-bundles, computing stochastic S-N curves of lab-scaled specimens in less than one minute. Model predictions are successfully validated against experiments from the literature. This model can be used to reduce the need for fatigue testing, and also to evaluate the impact of constituent properties on the fatigue life of composites. |
Issue Date: | Nov-2018 |
Date of Acceptance: | 14-May-2018 |
URI: | http://hdl.handle.net/10044/1/61038 |
DOI: | https://doi.org/10.1016/j.ijfatigue.2018.05.017 |
ISSN: | 0142-1123 |
Publisher: | Elsevier |
Start Page: | 677 |
End Page: | 690 |
Journal / Book Title: | International Journal of Fatigue |
Volume: | 116 |
Copyright Statement: | © 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Sponsor/Funder: | European Commission Royal Academy of Engineering |
Funder's Grant Number: | RF/133 |
Keywords: | Science & Technology Technology Engineering, Mechanical Materials Science, Multidisciplinary Engineering Materials Science Micro-mechanics Analytical modelling Cohesive interface modelling Fibre reinforced material Fatigue HIERARCHICAL SCALING LAW FIBER-REINFORCED EPOXY CARBON/EPOXY COMPOSITE DELAMINATION GROWTH POLYMER COMPOSITES FRACTURE-TOUGHNESS HYBRID COMPOSITES COHESIVE ZONE CRACK-GROWTH FAILURE 0913 Mechanical Engineering 0905 Civil Engineering Mechanical Engineering & Transports |
Publication Status: | Published |
Online Publication Date: | 2018-05-22 |
Appears in Collections: | Mechanical Engineering Faculty of Engineering |