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Influence of the Interface on the Energy Absorption Mechanisms of CMCs FREE

[+] Author Affiliations
Iñigo Puente, Reyes Elizalde, José M. Sánchez, José M. Martínez-Esnaola, Antonio Martín-Meizoso, Manuel Fuentes

Centro de Estudios e Investigaciones Técnicas de Guipúzcoa (CEIT), San Sebastián, SpainUniversidad de Navarra, San Sebastián, Spain

Paper No. 98-GT-408, pp. V005T14A035; 5 pages
doi:10.1115/98-GT-408
From:
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7866-8
  • Copyright © 1998 by ASME

abstract

An analysis of energy absorption in a tensile test of a CAS/SIC ceramic matrix composite is presented. The analysis is based on the principal parameters related to the strain and fracture mechanisms, as are the pullout length and the matrix crack spacing. The micro-mechanical properties of the material, the interfacial debonding, the frictional stress along the interface and the debonding energy are the core of the analysis. Using these parameters, the energy absorbed during the test, and the elastic energy released after fracture are calculated. The results are compared with those obtained in twenty-one tensile tests at room temperature, in which the strain energy density has been calculated and the permanent strain has been measured.

Copyright © 1998 by ASME
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