Accession Number:

ADA148630

Title:

Modeling Localized Stress Fields in Composite Laminates.

Descriptive Note:

Final scientific rept. 15 Jun 83-31 Mar 84,

Corporate Author:

VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCEAN ENGINEERING

Personal Author(s):

Report Date:

1984-07-01

Pagination or Media Count:

10.0

Abstract:

A structural model is developed using Reissners variational principle to analyze stress gradient problems in laminated composite plates. A statically admissible stress field, which has explicit dependence on the thickness coordinate, is selected for each layer. Both interlaminar traction and displacement continuity are enforced between layers. This model is similar to an earlier one developed by Pagano, but has four dependent variables less per layer than Paganos model. It is shown that the model can duplicate Paganos results for the same number of subdivisions through the thickness. The uniform axial extension of a bidirectional symmetric laminate is used as the example problem for comparison to Paganos theory and to illustrate the methodology. Originator-supplied keywords include stress concentration, and Interlaminar stresses.

Subject Categories:

  • Laminates and Composite Materials
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE