Design and analysis of test coupons for composite blade repairs /
Advancements in composite material technology have spurred an increase in the use of composites in modern rotorcraft structures. In addition to the desirable high-strength, low- weight features of these materials, the enhanced fatigue strength and damage tolerance has made composites particularly a...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Summary: | Advancements in composite material technology have spurred an increase in the use of composites in modern rotorcraft structures. In addition to the desirable high-strength, low- weight features of these materials, the enhanced fatigue strength and damage tolerance has made composites particularly attractive for advanced structural applications. Even though these structures are often damaged during service and need repair, composites can be repaired consistently. It is crucial to be able to predict the strength, life, and possible failure modes of a repaired component for reliability and design issues. The overall objective of the research program is to develop an integrated computational and experimental methodology to assess the fatigue life of a dynamic composite component repair. This research focuses on designing the test coupons for the experimental part, analyzing different repair techniques on the test coupons under static loading conditions, and predicting failure. A composite helicopter blade is used to illustrate the methodology. Two types of repairs on the blade, overlap and scarf, are modeled and analyzed using the finite element analysis techniques. A failure subroutine is incorporated into the finite element code to predict the initiation and progression of failure. |
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| Item Description: | Vita. "Major subject: Mechanical Engineering". |
| Physical Description: | xi, 82 leaves : illustrations ; 28 cm. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |