Accession Number : ADB068062

Title :   Integral Composite Skin and Spar (ICSS) Study Program. Volume II.

Descriptive Note : Final rept. Sep 78-Feb 82,

Corporate Author : GRUMMAN AEROSPACE CORP BETHPAGE NY

Personal Author(s) : Cacho-Negrete, C.

Report Date : SEP 1982

Pagination or Media Count : 196

Abstract : This report developed analysis procedures and test data on promising new integral concepts for attaching spars to skins in advanced composite wing structure, creating a data base and test methodology for future advanced structural concepts to be utilized in future aircraft systems. A total of three-hundred and eighty-four (384) tests were performed, including both static and spectrum fatigue with temperature spikes. The tests addressed the following wing loading conditions; flatwise tension (fuel pressure), transverse tension (chordwise tension), longitudinal tension, lateral spar web load (fuel pressure, spar shear, in-plane shear, combined transverse/flatwise tension, and combined longitudinal/flatwise tension. The tests were performed at room temperature (dry) and at 265 degrees F). The test results indicated that the new integral concepts are viable structural concepts for attaching spars to skins in advanced composite structures.

Descriptors :   *COMPOSITE MATERIALS, *COMPOSITE WINGS, *SKIN(STRUCTURAL), *SPARS, *FATIGUE(MECHANICS), FAILURE(MECHANICS), SHEAR PROPERTIES, TENSION, LOADS(FORCES), PRESSURE, TEMPERATURE, SPECTRUM ANALYSIS, AIRFRAMES, QUALITY CONTROL, FASTENINGS, FIBERS, COMPOSITE STRUCTURES, EPOXY RESINS, GRAPHITED MATERIALS, POLYAMIDE PLASTICS.

Subject Categories : Aircraft
      Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE