Fatigue Data on a Variety of Nonwoven Glass Composites for Helicopter Rotor Blades / JW. Davis, GJ. Sundsrud
- Conference Author:
- Composite Materials: Testing and Design (Fifth Conference) (5th : 1978 : New Orleans, La.)
- Physical Description:
- 1 online resource (12 pages) : illustrations, figures, tables
- Additional Creators:
- Davis, JW., Sundsrud, GJ., American Society for Testing and Materials, and ASTM International
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- Fatigue is one of the most critical design considerations for a helicopter, especially its rotor blades. The acceptance of glass fiber reinforced composites for the rotor blade structure has created a need for fatigue data. The fatigue testing described here was undertaken to determine which of the many raw material variables could contribute to improving this specific property. A series of thirty curves, alternating stress versus cycles to failure (S-N), have been developed for a number of the raw material variables in nonwoven glass fiber reinforced epoxy composites. These variables include glass type, glass fiber finish, glass fiber suppliers, fiber bundle size, and resin studies. Both an all unidirectional, 0-deg, and a bias, ¿̐ư45-deg, orientation were used in the tensile-tensile fatigue tests performed. The S-N curves indicate differences in the reproducibility and data scatter in the two orientations studied. The 0-deg orientation gave greater scatter in data than the ¿̐ư45-deg. Of the two orientations used, the ¿̐ư45-deg orientation gave greater spread between the variables being studied. The variation between the poorest and best materials tested was 85 percent. There were significant differences noted due to glass finish, fiber bundle size, and resins in this study.
- Dates of Publication and/or Sequential Designation:
- Volume 1979, Issue 674 (June 1979)
- 9780803147430 (e-ISBN)
- Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references.
- Other Forms:
- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Also available in PDF edition.
- Reproduction Note:
- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1979. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
- Technical Details:
- Mode of access: World Wide Web.
- Source of Acquisition:
- ASTM International PDF Purchase price USD25.
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