Accession Number:

ADA083974

Title:

Cylindrical Shells of Bimodulus Composite Material.

Descriptive Note:

Technical rept.,

Corporate Author:

OKLAHOMA UNIV NORMAN SCHOOL OF AEROSPACE MECHANICAL AND NUCLEAR ENGINEERING

Personal Author(s):

Report Date:

1980-02-01

Pagination or Media Count:

25.0

Abstract:

Certain fiber-reinforced materials, especially those with slightly curved fibers in very soft matrices, exhibit considerably smaller stiffnesses when loaded in compression than when loaded in tension. Examples are tire cord-rubber, wire-reinforced solid propellants, and certain soft biological tissues. For purposes of analysis and design, such materials can be modeled as a bimodulus material, i.e., one having one set of stiffnesses when the fiber-direction strain is tensile and another set when this strain is compressive. Using the fiber-governed bimodulus-material model introduced several years ago by the senior author and verified for cord-rubber composites, the present authors extend their previous work on the deflection of single-layer and cross-ply laminated rectangular plates to circular cylindrical shells of the same construction. A closed-form solution is presented for a thin, freely supported, cylindrically curved panel under sinusoidally distributed loading. Numerical results are presented to show the effect of shell curvature on the neutral-surface positions and deflection. Author

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE