Accession Number : ADA304541

Title :   Simplified Composite Micromechanics Equations for Strength, Fracture Toughness, Impact Resistance and Environmental Effects.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Chamis, C. C.

PDF Url : ADA304541

Report Date : 1984

Pagination or Media Count : 28

Abstract : A unified set of composite micromechanics equations of simple form is summarized and described. This unified set includes composite micromechanics equations for predicting (1) ply in-plane uniaxial strengths; (2) through-the-thickness strength (interlaminar and flexural); (3) in-plane fracture toughness; (4) in-plane impact resistance; and (5) through-the-thickness (interlaminar and flexural) impact resistance Equations are also included for predicting the hygrothermal effects on strength, fracture toughness and impact resistance. Several numerical examples are worked out to illustrate the ease of use of the various composite micromechanics equations. The numerical examples were selected, in part, to demonstrate the interrelationships of the various constituent properties in composite strength and strength-related behavior, to make comparisons with available experimental data and to provide insight into composite strength behavior.

Descriptors :   *FIBER REINFORCED COMPOSITES, *FLEXURAL STRENGTH, *MICROMECHANICS, MATHEMATICAL MODELS, THICKNESS, TENSILE STRENGTH, STRESS ANALYSIS, LAMINATES, SHEAR MODULUS, NUMERICAL ANALYSIS, TOUGHNESS, MATRIX MATERIALS, FRACTURE(MECHANICS), IMPACT STRENGTH, ENVIRONMENTAL IMPACT, MATHEMATICAL PREDICTION, MOISTURE, COMPRESSIVE STRENGTH, THERMAL DEGRADATION, AXIAL LOADS, SHEAR STRENGTH.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE