GLTRS--Glenn
TITLE AND SUBTITLE:
ICAN/Damp-Integrated Composite Analyzer With Damping Analysis Capabilities-Users Manual

AUTHOR(S):
Dimitrious A. Saravanos and Jose G. Sanfeliz

REPORT DATE:
1992

FUNDING NUMBERS:
WU-505-63-53

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

PERFORMING ORGANIZATION REPORT NUMBER:
E-6898

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

REPORT TYPE AND DATES COVERED:
Technical Publication

SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA TP-

SUPPLEMENTARY NOTES:
This report is a companion to NASA TP-3290, "Second Generation Integrated Composite Analyzer (ICAN) Computer Code."
Jose G. Sanfeliz, NASA Lewis Research Center; Dimitrious A. Saravanos, Ohio Aerospace Institute, 2001 Aerospace Parkway, Brook Park, Ohio 44142 and Resident Research Associate at NASA Lewis Research Center. Responsible person, Jose G. Sanfeliz, (216) 433-3348.

ABSTRACT:
This manual describes the use of the computer code ICAN/DAMP (Integrated Composite Analyzer with Damping Analysis Capabilities) for the prediction of damping in polymer-matrix composites. The code is written in FORTRAN 77 and is a version of the ICAN (Integrated Composite ANalyzer) computer program. The code incorporates a new module for synthesizing the material damping from micromechanics to laminate level. Explicit micromechanics equations based on hysteretic damping are programmed relating the on-axis damping capacities to the fiber and matrix properties and fiber volume ratio. The damping capacities of unidirectional composites subjected to off-axis loading are synthesized from on-axis damping values. The hygrothermal effect on the damping performance of unidirectional composites caused by temperature and moisture variation is modeled along with the damping contributions from interfacial friction between broken fibers and matrix. The temperature rise in continuously vibrating composite plies and composite laminates is also estimated. The ICAN/DAMP users manual provides descriptions of the damping analysis module's functions, structure, input requirements, output interpretation, and execution requirements. It only addresses the changes required to conduct the damping analysis and is used in conjunction with the "Second Generation Integrated Composite Analyzer (ICAN) Computer Code" users manual (NASA TP-3290).


SUBJECT TERMS:
Composite materials; Polymer-matrix composites; Laminates; Damping; Temperature; Moisture; Frequencies; Friction

NUMBER OF PAGES:
38

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