Computational Simulation of Continuous Fiber-Reinforced Ceramic Matrix Composites Behavior

TITLE AND SUBTITLE:
Computational Simulation of Continuous Fiber-Reinforced Ceramic Matrix Composites Behavior

AUTHOR(S):
Pappu L. N. Murthy, Christos C. Chamis, and Subodh K. Mital

REPORT DATE:
July 1996

FUNDING NUMBERS:
WU-505-63-12

PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Lewis Research Center
Cleveland, Ohio 44135-3191

PERFORMING ORGANIZATION REPORT NUMBER:
E-10140

SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration
Washington, D.C. 20546-0001

REPORT TYPE AND DATES COVERED:
Technical Paper

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TP-3602

SUPPLEMENTARY NOTES:
Pappu L. N. Murthy, and Christos C. Chamis, NASA Lewis Research Center; Subodh K. Mital, University of Toledo, Toledo, Ohio 43606. Responsible person, Pappu L.N. Murthy, organization code 5220, (216) 433-3332.

ABSTRACT:
This report describes a methodology which predicts the behavior of ceramic matrix composites and has been incorporated in the computational tool CEMCAN (CEramic Matrix Composite ANalyzer). The approach combines micromechanics with a unique fiber substructuring concept. In this new concept, the conventional unit cell (the smallest representative volume element of the composite) of the micromechanics approach is modified by substructuring it into several slices and developing the micromechanics-based equations at the slice level. The methodology also takes into account nonlinear ceramic matrix composite (CMC) behavior due to temperature and the fracture initiation and progression. Important features of the approach and its effectiveness are described by using selected examples. Comparisons of predictions and limited experimental data are also provided.

SUBJECT TERMS:
Ceramic matrix composite; Micromechanics; Progressive fracture; Unit cell; Fiber substructuring; Interphase; Interface; Progressive debonding; Partial interphase bond; Stress redistribution

NUMBER OF PAGES:
18

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