Advanced Composite Joints; Design and Acoustic Fatigue Characteristics
Abstract
The design and acoustic fatigue characteristics of joints with advanced composite materials are presented. Three hine-bay, cross-stiffened, graphite-epoxy panels with a six-plyskin and a central bay with nominal dimensions of 10.0 x 7.0 x 0.03 inch were designed and manufactured. The panels were tested to obtain acoustic response and acoustic fatigue data. A shaker test program was conducted to demonstrate that S-N data for acoustic fatigue predictions can be obtained in shaker specimen testing which is inexpensive relative to more costly acoustic panel tests. S-N data that were obtained in the shaker test program led to a prediction, which was subsequently confirmed by tests, that the joint assemblies of the flat, acoustic test panels would not experience an acoustic fatigue failure. S-N curves were developed for graphite- epoxy skins to a graphite-epoxy stiffener, boron-epoxy skin to a titanium alloy stiffener, and graphite- epoxy skin to a titanium alloy stiffener.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1971
- Accession Number
- AD0890037
Entities
People
- Marcus J. Jacobson