Development of a Low-Cost Graphite Reinforced Composite Primary Structural Component.
Abstract
In two preceeding NAVAIR programs, materials and processes studies indicated graphite reinforced polysulfone (Gr/Ps) composites have potential cost saving benefits for aircraft structure. Based on the encouraging results of the preceeding programs, the Navy funded a joint Boeing/Navy program to take the next developmental step to build and evaluate some Gr/Ps primary aircraft structural components. The Boeing portion of the program, which is summarized in this report, consisted of: Design Studies, Material and Process Studies, Structural Element and Subcomponent Testing, Prototype Component Fabrication and Delivery, Component Test Planning, Comparative Cost Analysis, Post-test Component Analysis. The prototype Gr/Ps components were designed, for demonstration purposes and low program cost, to replace the aluminum centerbody skins of the XBQM-34E Supersonic Firebee Target drone built by Teledyne Ryan Aeronautical. Comparative cost analyses were performed on preliminary designs prepared for a hypothetical large-scale aircraft fuselage panel using (1) conventional aluminum and (2) graphite-reinforced thermoplastic design concepts. A 20 percent cost saving was offered by the thermoplastic design concept in a 100-unit production run along with a 16 percent weight saving. Ground testing of the Gr/Ps components installed on a XBQM-34E airframe was performed. The components sustained the limit load condition associated with chute recovery (the critical design condition) without damage. Post-test analysis of the measured strains indicates that the load capabilities of the ?Gr/Ps components exceed their ultimate load requirements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1976
- Accession Number
- ADA035398
Entities
People
- John H. Laakso
- John T. Hoggatt
Organizations
- Boeing