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A Metal Matrix Composite Damage and Life Prediction Model PUBLIC ACCESS

[+] Author Affiliations
Jalees Ahmad, Unnikrishnan Santhosh

Research Applications, Inc., Centerville, OH

Sandra Hoff

U.S. Army Troop and Aviation Command, Fort Eustis, VA

Paper No. 97-GT-445, pp. V004T14A059; 19 pages
doi:10.1115/97-GT-445
From:
  • ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award
  • Orlando, Florida, USA, June 2–5, 1997
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7871-2
  • Copyright © 1997 by ASME

abstract

A simple analytical model is derived for the prediction of time dependent deformation and damage response of metal matrix composites under fiber direction loading. The model can be used in conjunction with a number of viscoplastic constitutive models to describe the matrix material behavior. Damage in the form of progressive fiber fractures is incorporated using a mechanistic approach. The criterion for fiber fractures can be based on statistical information on fiber strength. When used in conjunction with a prescribed failure condition for a composite, the model provides a means for predicting composite life under general thermomechanical load conditions. Based on comparison of results with detailed finite element analyses and with laboratory test data, it appears that the simple model provides reasonably accurate predictions.

Copyright © 1997 by ASME
This article is only available in the PDF format.

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