A fiber bridging model for fatigue delamination in composite materials
A fiber bridging model for fatigue delamination in composite materials
A fiber bridging model has been created to examine the effects of bridging on Mode I delamination fatigue fracture in a carbon fiber polymer–matrix composite. The model uses a cohesive zone law that is derived from quasi-static R-curves to determine the bridging energy applied in the bridged region. Timoshenko beam theory and an iterative self-consistent scheme are used to calculate the bridging tractions and displacements. After applying the bridging model to crack propagation data the scatter in the data was significantly reduced and clear trends were observed as a function of temperature that were not apparent previously. This indicated that the model appropriately accounted for the bridging in the experiments. Scanning electron microscopy crack opening displacement measurements were performed to validate the model’s predictions. The measurements showed that the predictions were close to the actual bridging levels in the specimen.
fatigue test, polymer matrix composites, fracture, fatigue, modeling
5493-502
Gregory, Jeremy R.
0b57613e-851a-4882-b99a-77339a10c70f
Spearing, S. Mark
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
2004
Gregory, Jeremy R.
0b57613e-851a-4882-b99a-77339a10c70f
Spearing, S. Mark
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Gregory, Jeremy R. and Spearing, S. Mark
(2004)
A fiber bridging model for fatigue delamination in composite materials.
Acta Materialia, 52 (19), .
(doi:10.1016/j.actamat.2004.08.009).
Abstract
A fiber bridging model has been created to examine the effects of bridging on Mode I delamination fatigue fracture in a carbon fiber polymer–matrix composite. The model uses a cohesive zone law that is derived from quasi-static R-curves to determine the bridging energy applied in the bridged region. Timoshenko beam theory and an iterative self-consistent scheme are used to calculate the bridging tractions and displacements. After applying the bridging model to crack propagation data the scatter in the data was significantly reduced and clear trends were observed as a function of temperature that were not apparent previously. This indicated that the model appropriately accounted for the bridging in the experiments. Scanning electron microscopy crack opening displacement measurements were performed to validate the model’s predictions. The measurements showed that the predictions were close to the actual bridging levels in the specimen.
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Published date: 2004
Keywords:
fatigue test, polymer matrix composites, fracture, fatigue, modeling
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Local EPrints ID: 23003
URI: http://eprints.soton.ac.uk/id/eprint/23003
ISSN: 1359-6454
PURE UUID: 88a01ccc-fd27-41fe-b322-9ca5b35006c3
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Date deposited: 13 Mar 2006
Last modified: 16 Mar 2024 03:37
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Author:
Jeremy R. Gregory
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