VIBRATION EVALUATION OF SANDWICH CONICAL SHELLS WITH FIBER-REINFORCED COMPOSITE FACINGS

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1968
Accession Number
AD0684318

Entities

People

  • Byron L. Mayberry
  • Charles W. Bert
  • John D. Ray

Organizations

  • University of Oklahoma

Tags

Communities of Interest

  • Air Platforms
  • Engineered Resilient Systems
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Composite Materials
  • Engineers
  • Fiber Reinforced Composites
  • Fuselages
  • Materials Laboratories
  • Materials Processing
  • Measurement
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanics
  • Plastics
  • Reinforced Plastics
  • Resonant Frequency
  • Sandwich Construction
  • Strain Gages

Fields of Study

  • Physics

Readers

  • Reinforced Composite Materials
  • Structural Dynamics.