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Issues related to prediction of residual stresses in titanium alloy matrix composites [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
21 pages : digital, PDF file
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Recently, a detailed study of residual stresses on the as-processed SCS-6/Ti-24Al-11Nb [0]₈ composite, and SCS-6/Beta-21S composites in unidirectional [0]₄, cross-ply [0/90]s, and quasi-isotropic [0/±45/90]s lay-ups has been completed. In this study, residual stresses have been measured using x-ray diffraction (Sin²Ψ) technique. We have shown that the use of conventional unit cell models consisting of a quarter fiber surrounded by the matrix material to predict residual stresses for verification of experimental results is inadequate. Such models have successfully predicted the stresses at the fiber-matrix interface. However, experimental work to measure residual stresses have always been on surfaces far away from the interface region. In this paper, the approach taken in extending the conventional unit cell model to the concept of multi-fiber models to predict average stresses are presented. In this process, several modeling issues have been identified. These issues are (i) use of conventional unit models for prediction of average surface residual stresses, (ii) effect of orientation of the sub-surface plies on the residual stresses in the surface ply, (iii) residual stresses in the interior plies, and (iv) constituent material properties.
Report Numbers
E 1.99:la-ur--94-4374
E 1.99: conf-940399--2
conf-940399--2
la-ur--94-4374
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/01/1995.
"la-ur--94-4374"
" conf-940399--2"
"DE95005243"
Life prediction methodology for titanium matrix composites symposium,Hilton Head, SC (United States),22-24 Mar 1994.
Jayaraman, N.; Rangaswamy, P.
Funding Information
W-7405-ENG-36
View MARC record | catkey: 14457097