Accession Number : ADA309276

Title :   Analytical and Experimental Investigation of Aircraft Metal Structures Reinforced with Filamentary Composites. Phase 1. Concept Development and Feasibility.

Descriptive Note : Contract rept.,

Corporate Author : BOEING COMMERCIAL AIRPLANE CO SEATTLE WA

Personal Author(s) : Oken, S. ; June, R. R.

PDF Url : ADA309276

Report Date : DEC 1971

Pagination or Media Count : 124

Abstract : This report covers the analytical and experimental investigations in phase I of a three phase program performed to establish the feasibility of reinforcing metal aircraft structures with advanced filamentary composites. The interactions resulting from combining the two types of materials into single assemblies as well as their ability to function structurally were studied. The combinations studied were boron-epoxy reinforced aluminum, boron-epoxy reinforced titanium, and boron-polyimide reinforced titanium. The concepts used unidirectional composites as reinforcement in the primary loading direction and metal for carrying the transverse loads as well as its portion of the primary load. The program established that several realistic concepts could be fabricated, that these concepts could perform to a level that would result in significant weight savings, and that there are means for predicting their capability within a reasonable degree of accuracy. This program also encountered problems related to the application of polyimide systems that resulted in their relatively poor and variable performance.

Descriptors :   *AIRCRAFT, *FIBER REINFORCED COMPOSITES, *METAL MATRIX COMPOSITES, *ADHESIVES, COMPRESSION, STRESS STRAIN RELATIONS, LOAD DISTRIBUTION, COMPOSITE MATERIALS, LAMINATES, STIFFENING, BENDING, BUCKLING, AIRFRAMES, BONDING, FILAMENTS, TITANIUM, CURING, EPOXY COMPOSITES, BORON, FAILURE(MECHANICS), THERMAL STRESSES, REINFORCING MATERIALS, SUBSONIC FLIGHT, ADHESIVE BONDING, SANDWICH PANELS, HONEYCOMB CORES, SHEAR STRENGTH, SUPERSONIC AIRCRAFT, POLYIMIDE RESINS.

Subject Categories : Aircraft
      Commercial and General Aviation
      Laminates and Composite Materials
      Adhesives, Seals and Binders

Distribution Statement : APPROVED FOR PUBLIC RELEASE