Heterogeneous Characterization of Composite Materials with Progressive Damage.

Abstract

The objective of this investigation is to develop constitutive and failure models for composite materials based on observed damage mechanisms and damage development. Unidirectional continuous-fiber ceramic matrix composites were investigated under longitudinal and transverse loading. Failure mechanisms and their development were studied in real time under the microscope. Micromechanical analyses were conducted and stress distributions were obtained in the constituents and around matrix and interfacial cracks. The influence of the interphase region on stress strain relations and failure properties was studied. A modified shear lag analysis yielded stress strain relations to failure and relations between applied stress, matrix cracking and fiber-matrix debonding.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1991
Accession Number
ADA239162

Entities

People

  • I. M. Daniel
  • Jan D. Achenbach
  • L. M. Keer

Organizations

  • Northwestern University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Ceramic Matrix Composites
  • Composite Materials
  • Failure Mode And Effect Analysis
  • Materials
  • Mechanical Properties
  • Mechanics
  • Micromechanics
  • Scientific Research
  • Shear Stresses
  • Silicon Carbide
  • Stress Concentration
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Tensile Stress
  • Transverse

Readers

  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.