Accession Number:

ADA231423

Title:

A Computationally Viable Higher-Order Theory for Laminated Composite Plates

Descriptive Note:

Final rept.

Corporate Author:

ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB

Personal Author(s):

Report Date:

1990-11-01

Pagination or Media Count:

35.0

Abstract:

A variational higher-order theory involving all transverse strain and stress components is proposed for the analysis of laminated composites plates. Derived from three-dimensional elasticity with emphasis on developing a viable computational methodology, the theory is well studied for finite element approximations as it incorporates both C0 and C-1 continuous kinematic fields and Poisson boundary conditions. From the theory, a simple three-node stretching-bending finite element is developed and applied to the problem of cylindrical bending of a symmetric carbonepoxy laminate for which an exact solution is available. Both the analytic and finite element result were found to be in excellent agreement with the exact solution for a wide range of the length-to-thickness ratio. The proposed higher-order theory has the same computational advantages as first-order shear-deformable theories. the present methodology, however, provides greater predictive capability, especially, for thick-section composites.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE