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

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 th...

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Bibliographic Details
Main Authors: Ghanimati, G R, Panahandeh, M, Bozorgnia, Y
Format: Report
Language:English
Subjects:
COMPOSITE MATERIALS
CONSERVATION
DYNAMICS
ELASTIC PROPERTIES
EQUATIONS
GEOMETRY
LAMINATES
Laminates and Composite Materials
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NONLINEAR SYSTEMS
STRESSES
THEORY
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Summary: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.