Stresses during Fabrication of Cylindrically Woven Carbon-Carbon Composites.

Abstract

Carbon-carbon billets sometimes experience failure during fabrication. In order to understand the stresses causing these failures, we have modeled the elastically anisotropic billet as an assembly of very thin-walled, isotropic cylinders. Alternate cylinders have different properties; one set models the fibers, the other the matrix. The assembly has cylindrical anisotropy and permits simple calculation of the thermal stresses of fabrication. The stresses are calculated for the billet after cracks have been filled with pitch and reheated. A fabrication microcracking morphology is presented and the causes of this cracking discussed. The benefit of adding circumferential fibers to the inner and outer diameters is shown. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 10, 1982
Accession Number
ADA123153

Entities

People

  • George Sines
  • Jacob Cohen

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Carbon Carbon Composites
  • Composite Materials
  • Creep
  • Engineering
  • Jet Propulsion
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Engineering
  • Mechanical Working
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Tensile Stress
  • Thermal Stresses

Fields of Study

  • Materials science

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Reinforced Composite Materials
  • Thermal Physics or Thermal Science.