Accession Number : ADA307345

Title :   Design, Fabrication and Test of Multi-Fiber Laminates.

Descriptive Note : Contractor rept.,

Corporate Author : UNITED AIRCRAFT RESEARCH LABS EAST HARTFORD CT

Personal Author(s) : Pike, R. A. ; Novak, R. C.

PDF Url : ADA307345

Report Date : JAN 1975

Pagination or Media Count : 191

Abstract : The objective of the program is to design, fabricate, and test unidirectional and angleply multi-fiber laminates for improved impact strength and other mechanical properties. The effects of several variables on the mechanical properties of epoxy matrix materials are described. These include fiber type (HMS and AS graphites, glass, and Kevlar 49), ratio of primary to hybridizing fiber and hybrid configuration. It is demonstrated that AS graphite/S-glass in an intraply configuration results in the best combination of static and Charpy impact properties as well as superior ballistic impact resistance. Pendulum impact tests which were conducted on thin specimens are shown to produce different ranking of materials than tests conducted on standard thickness Charpy specimens, and it is shown that the thin specimen results are in better agreement with the ballistic impact data. Additional static test data are reported as a function of temperature for the seven best hybrid configurations having epoxy, polyimide (PMR-15) and polyphenylquinoxaline resins as the matrix.

Descriptors :   *LAMINATES, *FIBER REINFORCED COMPOSITES, *IMPACT STRENGTH, *TERMINAL BALLISTICS, *EPOXY RESINS, VELOCITY, TENSILE STRENGTH, PROJECTILES, IMPACT TESTS, POLYAMIDE PLASTICS, DEFLECTION, FABRICATION, GRAPHITE, MATRIX MATERIALS, THERMAL EXPANSION, GLASS FIBERS, HYBRID SYSTEMS, EPOXY COMPOSITES, COMPRESSIVE STRENGTH, CHARPY IMPACT TESTS, FLEXURAL PROPERTIES, STATIC TESTS, SHEAR STRENGTH, POLYIMIDE RESINS, QUINOXALINES.

Subject Categories : Laminates and Composite Materials
      Plastics
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE