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UBC Theses and Dissertations
Fatigue damage propagation in graphite/epoxy composites Yavuz, Ömer
Abstract
A series of tests was performed to determine the increase in the crack length or fatigue damage of graphite/epoxy composites under tension-tension fatigue using traveling microscope, tetrabromoethane enhanced radiography and compliance techniques. Hercules As/3501-6 graphite fibre/epoxy prepreg was used to produce laminates which were subsequently cut into compact tension sample geometry. [90/0] ply configuration was used in the preparation of the laminates. Fatigue damage was observed to be in the form of a 'damage zone' rather than a single crack, which increased in size in both the 0° and 90° directions during fatigue. The damage followed three stages, during the whole fatigue life. The first stage was the acceleration; the intermediate stage was the deceleration and the final stage was the reacceleration of the damage. As a result of this behaviour the Paris approach was found to be non-valid for this material. Change in the compliance was observed during fatigue and this change revealed the same three stages as the development of the damage zone.
Item Metadata
Title |
Fatigue damage propagation in graphite/epoxy composites
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1984
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Description |
A series of tests was performed to determine the increase in the crack length or fatigue damage of graphite/epoxy composites under tension-tension fatigue using traveling microscope, tetrabromoethane enhanced radiography and compliance techniques. Hercules As/3501-6 graphite fibre/epoxy prepreg was used to produce laminates which were subsequently cut into compact tension sample geometry. [90/0] ply configuration was used in the preparation of the laminates.
Fatigue damage was observed to be in the form of a 'damage zone' rather than a single crack, which increased in size in both the 0° and 90° directions during fatigue. The damage followed three stages, during the whole fatigue life. The first stage was the acceleration; the intermediate stage was the deceleration and the final stage was the reacceleration of the damage. As a result of this behaviour the Paris approach was found to be non-valid for this material.
Change in the compliance was observed during fatigue and this change revealed the same three stages as the development of the damage zone.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-05-24
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0078767
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.