GLTRS--Glenn
TITLE AND SUBTITLE:
PCEMCAN-Probabilistic Ceramic Matrix Composites Analyzer User's Guide, Version 1.0

AUTHOR(S):
Ashwin R. Shah, Subodh K. Mital, and Pappu L.N. Murthy

REPORT DATE:
July 1998

FUNDING NUMBERS:
WU-523-21-13-00

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

PERFORMING ORGANIZATION REPORT NUMBER:
E-11154

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

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-1998-206984

SUPPLEMENTARY NOTES:
Ashwin R. Shah, Sest, Inc., North Royalton, Ohio 44133 (formerly with NYMA, Inc.); Subodh K. Mital, University of Toledo, Toledo, Ohio 43606; and Pappu L.N. Murthy, NASA Lewis Research Center. Responsible person, Pappu L.N. Murthy, organization code 5910, (216) 433-3332.

ABSTRACT:
PCEMCAN (Probabilistic CEramic Matrix Composites ANalyzer) is an integrated computer code developed at NASA Lewis Research Center that simulates uncertainties associated with the constituent properties, manufacturing process, and geometric parameters of fiber reinforced ceramic matrix composites and quantifies their random thermomechanical behavior. The PCEMCAN code can perform the deterministic as well as probabilistic analyses to predict thermomechanical properties. This User's guide details the step-by-step procedure to create input file and update/modify the material properties database required to run PCEMCAN computer code. An overview of the geometric conventions, micromechanical unit cell, nonlinear constitutive relationship and probabilistic simulation methodology is also provided in the manual. Fast probability integration as well as Monte-Carlo simulation methods are available for the uncertainty simulation. Various options available in the code to simulate probabilistic material properties and quantify sensitivity of the primitive random variables have been described. The description of deterministic as well as probabilistic results have been described using demonstration problems. For detailed theoretical description of deterministic and probabilistic analyses, the user is referred to the companion documents "Computational Simulation of Continuous Fiber-Reinforced Ceramic Matrix Composite Behavior," NASA TP-3602, 1996 and "Probabilistic Micromechanics and Macromechanics for Ceramic Matrix Composites," NASA TM 4766, June 1997.

SUBJECT TERMS:
Ceramic; Micromechanics; Macromechanics; Composite; Laminate; Uncertainties; Probability; Scatter; Reliability

NUMBER OF PAGES:
80

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1998/TM-1998-206984.pdf
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