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Structural properties of laminated Douglas fir/epoxy composite material [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1990.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: (127 pages) : digital, PDF file
Additional Creators
Lewis Research Center, United States. Department of Energy, United States. National Aeronautics and Space Administration, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
This publication contains a compilation of static and fatigue and strength data for laminated-wood material made from Douglas fir and epoxy. Results of tests conducted by several organizations are correlated to provide insight into the effects of variables such as moisture, size, lamina-to-lamina joint design, wood veneer grade, and the ratio of cyclic stress to steady stress during fatigue testing. These test data were originally obtained during development of wood rotor blades for large-scale wind turbines of the horizontal-axis (propeller) configuration. Most of the strength property data in this compilation are not found in the published literature. Test sections ranged from round cylinders 2.25 in. in diameter to rectangular slabs 6 in. by 24 in. in cross section and approximately 30 ft long. All specimens were made from Douglas fir veneers 0.10 in. thick, bonded together with the WEST epoxy system developed for fabrication and repair of wood boats. Loading was usually parallel to the grain. Size effects (reduction in strength with increase in test volume) are observed in some of the test data, and a simple mathematical model is presented that includes the probability of failure. General characteristics of the wood/epoxy laminate are discussed, including features that make it useful for a wide variety of applications. 9 refs.
Report Numbers
E 1.99:doe/nasa/20320-76
E 1.99: nasa-rp--1236
nasa-rp--1236
doe/nasa/20320-76
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
05/01/1990.
"doe/nasa/20320-76"
" nasa-rp--1236"
"DE91000529"
Spera, D.A.; Esgar, J.B.; Gougeon, M.; Zuteck, M.D.
Funding Information
AI01-76ET20320
View MARC record | catkey: 14458171