Accession Number:

ADA080483

Title:

Analyses of Cross-Ply Rectangular Plates 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:

1980-01-01

Pagination or Media Count:

112.0

Abstract:

A differential-equation formulation is presented for the equations governing the small-deflection elastic behavior of thick plates laminated of anisotropic bimodulus materials which have different elastic stiffnesses depending upon the sign of the fiber-direction strains. This study is concerned with the problems of bending due to pressure loading, free vibrations, and thermal expansion of thick plates having finite transverse shear moduli. Large static deflections of thin plates are also analyzed by an approximate technique. A simple scheme is used for determining explicitly the location of the neutral surface which is defined on the basis of fiber-direction strain. This provides a basis for rational design of such plates. Exact closed-form solutions are presented for freely supported rectangular plates subjected to a sinusoidally distributed normal pressure. Based on experimentally measured bimodulus properties, some numerical computations are carried out. Good agreement is obtained when compared with numerical results existing in the literature for special cases. The results presented here can be used to validate finite-element codes being developed for analysis of thick plates laminated of bimodulus material. Author

Subject Categories:

  • Laminates and Composite Materials
  • Numerical Mathematics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE