Thermomechanical Analysis of Carbon-Carbon Composites Evaluation Report

Abstract

A three-dimensional progressive failure analysis was developed to predict the stiffness and strength of oxidation-resistant carbon-carbon composites subjected to thermal and mechanical loads. Both plain and satin weave composites were studied. A continuum damage modeling strategy was used. However, the shapes of the predicted zones often were 'crack-like'. The tow crossover region was identified as a critical region for damage initiation. Matrix cracking and debonding between the tows was predicted. The fiber architecture was shown to have a large influence on stiffness, when damage occurred, and the type of damage. The analysis provides detailed information about damage initiation and growth. Of course, the predictions can be no better than the input data. The current program developed key analytical capabilities and demonstrated the sensitivity of the CC composite behavior to various parameters. To go further will require improved experimental data that will either validate the analysis or indicate aspects that require refinement.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1997
Accession Number
ADA330014

Entities

People

  • John Whitbomb
  • Ozden Ochoa

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Carbon Carbon Composites
  • Composite Materials
  • Composite Structures
  • Computational Mechanics
  • Engineering
  • Experimental Data
  • Failure Analysis
  • Fibers
  • Materials
  • Mechanics
  • Reinforced Plastics
  • Stiffness
  • Stress Analysis
  • Stresses
  • Test And Evaluation
  • Three Dimensional
  • Universities

Fields of Study

  • Materials science

Readers

  • Computational Modeling and Simulation
  • Reinforced Composite Materials
  • Structural Health Monitoring of Composite Structures.