FABRICATION AND FULL-SCALE STRUCTURAL EVALUATION OF SANDWICH SHELLS OF REVOLUTION COMPOSED OF FIBER GLASS REINFORCED PLASTIC FACINGS AND HONEYCOMB CORES
Abstract
Large sandwich cylinders, truncated cones, and curved panels composed of fiber glass-epoxy facings and honeycomb cores were fabricated and tested as a part of a larger research program designed to bring acceptability of reinforced plastics for primary load-bearing members of Army aircraft structures. The many aspects of tooling for and fabrication of these large shells (up to 58-inch diameter and 72 inches long) by autoclave cure were examined in detail. To generate preliminary data on this mode of shell failure, the shells were designed to fail in buckling. The tests were carried out on a testing machine capable of applying 3,000,000 inch-pounds of bending moment, of torque, or of each in combination. Curved-panel compressive test values agreed reasonably well with the approximate theoretical analyses available, but agreement of test and analysis was not good for the shear loading. Preliminary interaction relations were confirmed tentatively for the combined torsion and bending of the cylinders and truncated cones.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1967
- Accession Number
- AD0666480
Entities
People
- Charles W. Bert
- Gene M. Nordby
- W. C. Crisman
Organizations
- University of Oklahoma