Accession Number : ADA310295

Title :   Characterization of Deformation and Damage in Brittle Matrix Composite Materials.

Descriptive Note : Final rept. 1 Aug 92-31 Jan 96,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL

Personal Author(s) : Daniel, I. M.

PDF Url : ADA310295

Report Date : 10 MAY 1996

Pagination or Media Count : 147

Abstract : The objective of this investigation is to study deformation and failure of brittle-matrix composite materials. Unidirectional and crossply continuous-fiber ceramic-matrix composites were investigated under uniaxial loading. Failure mechanisms and their development were studied in real time under the microscope and also by means of ultrasonic and acoustic emission techniques. All observations and measurements were correlated with the macroscopic stress-strain behavior of the material and compared with predictions of analytical models. A new model was developed for correlation of failure micromechanisms and macroscopic response of the material.

Descriptors :   *DAMAGE, *COMPOSITE MATERIALS, *DEFORMATION, *FAILURE, *MATRIX MATERIALS, *BRITTLENESS, STRESS STRAIN RELATIONS, MATHEMATICAL MODELS, FIBERS, PREDICTIONS, REAL TIME, MICROSCOPY, CERAMIC MATERIALS, ULTRASONICS, MICROMECHANICS, ACOUSTIC EMISSIONS, CONTINUOUS PROCESSING, AXIAL LOADS, UNIDIRECTIONAL.

Subject Categories : Laminates and Composite Materials
      Ceramics, Refractories and Glass
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE