Accession Number : ADA302462
Title : Investigation of the Effect of Resin Material on Impact Damage to Graphite/Epoxy Composites.
Descriptive Note : Contract rept.,
Corporate Author : MCDONNELL DOUGLAS CORP LONG BEACH CA DOUGLAS AIRCRAFT DIV
Personal Author(s) : Palmer, R. J.
PDF Url : ADA302462
Report Date : MAY 1981
Pagination or Media Count : 125
Abstract : This report describes the results of an experimental program that establishes the feasibility and guide lines for new resins development. The objective was to identify the basic epoxy neat resin properties that will improve low velocity impact resistance and toughness to graphite/epoxy laminates and, at the same time, maintain useful structural laminate mechanical properties. Material tests from twenty-three toughened epoxy resin matrix systems are included in this investigation. The apparent desirable neat resin properties to obtain the best combination of impact and mechanical composite properties are tensile strength above 6.89xlO to the 7th Newtons/sq m (10,000 psi),- tensile modulus above 3.lOx l0 to the 9th Newtons/sq m (450,000 psi), and tensile elongation between 5 and 6%. (MM)
Descriptors : *COMMERCIAL AIRCRAFT, *MILITARY AIRCRAFT, *IMPACT STRENGTH, *EPOXY LAMINATES, *EPOXY RESINS, *GRAPHITE EPOXY COMPOSITES, STRESS STRAIN RELATIONS, LOAD DISTRIBUTION, MECHANICAL PROPERTIES, TENSILE STRENGTH, POLYMERS, LAMINATES, IMPACT TESTS, DAMAGE ASSESSMENT, TENSILE PROPERTIES, DEFLECTION, ELASTOMERS, TOUGHNESS, MATRIX MATERIALS, TEST EQUIPMENT, STRENGTH(MECHANICS), HEAT TREATMENT, AMINES, LOW VELOCITY, STRUCTURAL RESPONSE, FLEXURAL STRENGTH, LIGHTWEIGHT, THERMOPLASTIC RESINS, AROMATIC COMPOUNDS, YIELD STRENGTH, CURING, FAILURE(MECHANICS), ELONGATION, COMPRESSIVE PROPERTIES.
Subject Categories : Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE