Accession Number : ADA289128

Title :   Modeling Considerations in the Prediction of Residual Strength in Composite Laminates,

Corporate Author : ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE

Personal Author(s) : Saether, Eric

PDF Url : ADA289128

Report Date : NOV 1994

Pagination or Media Count : 62

Abstract : The prediction of residual strength in damaged composite structures is complicated by the need to accurately characterize internal damage states and to mathematically simulate the material behavior which displays a variety of damage mechanisms and failure modes. Numerous analyses have been developed which, in general, have been restricted to specific damage modes and idealized geometric configurations. Modeling issues include micromechanical fiber/matrix failure phenomena, delamination growth, buckling of laminate sublayers and nonlinear material and geometric response to applied loads. For the reliable design of composite components, the modeling approaches utilized in various specialized analyses need to be synthesized into a combined, robust methodology. The purpose of the present investigation is to identify the various salient failure phenomena involved in damaged composite laminates and to discuss mathematical modeling approaches to represent such damage. The identification of analytic approaches provide a basis for further extension to overcome existing limitations in the prediction of residual strength.

Descriptors :   *MATHEMATICAL MODELS, *DAMAGE, *COMPOSITE MATERIALS, *LAMINATES, PREDICTIONS, MODELS, MATERIALS, GROWTH(GENERAL), FAILURE, COMPOSITE STRUCTURES, STRENGTH(MECHANICS), IDENTIFICATION, RELIABILITY, NONLINEAR SYSTEMS, GEOMETRIC FORMS, RESIDUALS, RESPONSE, GEOMETRY, SEPARATION, MICROMECHANICS.

Subject Categories : Laminates and Composite Materials
      Numerical Mathematics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE