Tailored Metal Matrix Composites for High-Temperature Performance

TITLE AND SUBTITLE:
Tailored Metal Matrix Composites for High-Temperature Performance

AUTHOR(S):
M.R. Morel, D.A. Saravanos, and C.C. Chamis

REPORT DATE:
March 1992

FUNDING NUMBERS:
WU-510-01-08

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
Sverdrup Technology, Inc.
Lewis Research Center Group
2001 Aerospace Parkway
Brook Park, Ohio 44142

PERFORMING ORGANIZATION REPORT NUMBER:
E-7247

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-105816

SUPPLEMENTARY NOTES:
Prepared for the 37th International SAMPE Symposium and Exhibition sponsored by the Society for the Advancement of Materials and Processing Engineering, Anaheim, California, March 9-12, 1992. M.R. Morel, Sverdrup Technology, Inc., Lewis Research Center Group, 2001 Aerospace Parkway, Brook Park, Ohio 44142; D.A. Saravanos, Ohio Aerospace Institute, 2001 Aerospace Parkway, Brook Park, Ohio 44142, and C.C. Chamis, NASA Lewis Research Center, Cleveland, Ohio. Responsible person, M.R. Morel, (216) 891-2284.

ABSTRACT:
A multi-objective tailoring methodology is presented to maximize stiffness and load carrying capacity of a metal matrix cross-ply laminate at elevated temperatures. The fabrication process and fiber volume ratio are used as the design variables. A unique feature is the concurrent effects from fabrication, residual stresses, material nonlinearity, and thermo-mechanical loading on the laminate properties at the post-fabrication phase. For a [0/90]s graphite/copper laminate, strong coupling was observed between the fabrication process, laminate characteristics, and thermo-mechanical loading. The multi-objective tailoring was found to be more effective than single objective tailoring. Results indicate the potential to increase laminate stiffness and load carrying capacity by controlling the critical parameters of the fabrication process and the laminate.

SUBJECT TERMS:
Metal matrix composites; Laminate; Fabrication process; Tailoring; Optimization; Residual stress

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