GLTRS--Glenn
TITLE AND SUBTITLE:
Simplified Micromechanics of Plain Weave Composites

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

REPORT DATE:
March 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-10115

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

REPORT TYPE AND DATES COVERED:
Technical Memorandum

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TM-107165

SUPPLEMENTARY NOTES:
Subodh K. Mital, University of Toledo, Toledo, Ohio 43606 (work funded by NASA Grant NAG3-1264); Pappu L.N. Murthy and Christos C. Chamis, NASA Lewis Research Center. Responsible person, Pappu L.N. Murthy, organization code 5210, (216) 433-3332.

ABSTRACT:
A micromechanics based methodology to simulate the complete hygro-thermomechanical behavior of plain weave composites is developed. This methodology is based on micromechanics and the classical laminate theory. The methodology predicts a complete set of thermal, hygral and mechanical properties of plain woven composites, generates necessary data for use in a finite element structural analysis, and predicts stresses all the way from the laminate to the constituent level. This methodology is used in conjunction with a composite mechanics code to analyze and predict the properties/response of a generic graphite/epoxy woven textile composite and a plain weave ceramic composite. The fiber architecture, including the fiber waviness and fiber end distributions through the thickness, is properly accounted for. Predicted results compare reasonably well with those from detailed three-dimensional finite element analyses as well as available experimental data. However, the main advantage of the proposed methodology is its high computational efficiency as compared with three-dimensional finite element analyses.

SUBJECT TERMS:
Composite mechanics; Textile composites; Properties; Woven composites; Laminate theory; Composite mechanics; Waviness

NUMBER OF PAGES:
14

PDF AVAILABLE FROM URL:
1996/TM-107165.pdf
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