VIBRATION EVALUATION OF SANDWICH CONICAL SHELLS WITH FIBER-REINFORCED COMPOSITE FACINGS
Final rept. 1 Jul 1967-31 Jul 1968
OKLAHOMA UNIV RESEARCH INST NORMAN
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The report describes an experimental and analytical evaluation of the vibrational characteristics of a truncated conical shell of sandwich construction. The shell was composed of fiber glass-epoxy facings and aluminum honeycomb core. The dimensions were selected to be typical of an Army aircraft fuselage structure. The shell was suspended by soft cords, to closely approximate free-free boundary conditions, and was excited laterally by an electrodynamic shaker placed at various locations along the shell. This analysis includes the orthotropic nature of the composite-material facings. Values of the damping logarithmic decrement are also presented.
- Laminates and Composite Materials