TENSILE AND FATIGUE FAILURE OF GLASS AND CARBON FIBER BUNDLES
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Authors
Kadlec, Lauren N.
Subjects
composite materials
cyclic loading
tensile loading
fatigue failure
fatigue model
cyclic loading
tensile loading
fatigue failure
fatigue model
Advisors
Kwon, Young W.
Date of Issue
2022-03
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
The use of composite materials in naval applications has been increasing, primarily due to their high strength-to-weight ratio. However, additional study is needed on the impact of cyclic loading on these materials. The goal of this study was to develop a mathematical model to predict fatigue failure, so as to be able to more accurately determine material lifetime in naval applications. Fiber bundles of either glass or carbon were used in the testing. Tests under tensile loading were conducted in order to estimate the materials’ properties and conduct a slack fiber analysis. Cyclic tests were conducted at strain rates varying from 0.03 to 0.07. The lower end of the cyclic tests was 0.1 times the maximum. Additionally, multi-part tests were conducted. This involved conducting a cyclic test for a certain number of cycles followed by a tensile test to failure. These included both strain-based and force-based cyclic tests. The residual material characteristics were then mathematically modeled in order to predict the fatigue model.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
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NPS Report Number
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Distribution Statement
Approved for public release. Distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.