Accession Number:

ADA224985

Title:

Development of an Advanced Continuum Theory for Composite Laminates. Phase 1

Descriptive Note:

Final rept. 1 Nov 1989-30 Jun 1990

Corporate Author:

BERKELEY APPLIED SCIENCE AND ENGINEERING CA

Report Date:

1990-06-27

Pagination or Media Count:

263.0

Abstract:

A continuum theory for laminated composite materials, referred to as Cosserat Composite Theory, was developed. The theory was represented by a set of well defined conservation laws that within the context of purely mechanical theory exhibits the following features i it accounts for the effect of microstructures, ii it accounts for the effect of geometric nonlinearity, iii it accounts for the interlaminar stresses and therefore delamination can be considered, iv it is cable of incorporating the effect of material nonlinearity, v it accounts for the effect of curvature, vi it possesses a continuum character, and finally vii it is applicable to both static and dynamic problems. The composite laminate was modeled as a series of Cosserat surfaces which were considered as microstructures. Various quantities associated with the microstructure were defined and the corresponding quantities for composite laminates were derived. The nonlinear constitutive equations for an elastic composite laminate were presented.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE