Analysis of Progressive Matrix Cracking in Composite Laminates.

Abstract

This report summarizes recent results of studies on progressive ply cracking in fibrous laminates. Evaluation of stiffness changes caused by systems of aligned slit cracks which are parallel to the fiber direction in a unidirectional composite lamina is discussed. Results obtained by the self-consistent method are presented. Next, a procedure for estimating instantaneous crack densities and stiffness changes in a lamina subjected to a prescribed strain history is outlined. These results are extended to analysis of laminated composite plates under in-plane stresses. Specific examples and comparisons of analytical and experimental results are presented for two graphite-epoxy systems. Keywords: Composite materials; Cracking; Damage accumulation.

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Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1985
Accession Number
ADA162220

Entities

People

  • George J. Dvorak

Organizations

  • Rensselaer Polytechnic Institute

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Space

DTIC Thesaurus Topics

  • Composite Materials
  • Composite Structures
  • Elastic Properties
  • Elements
  • Engineering
  • Experimental Data
  • Failure Mode And Effect Analysis
  • Graphitic Materials
  • Laminates
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanical Properties
  • Mechanics
  • Stiffness
  • Stresses
  • Thermal Stresses

Readers

  • Structural Health Monitoring of Composite Structures.