San Diego State University - Minds That Move the World

Luciano Demasi

  Luciano Demasi

   Professor

   Department of Aerospace Engineering
   San Diego State University

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Research Activities

Generalized Unified Formulation for Composite Structures

With the Computational Multi-Theory Architecture known as the Generalized Unified Formulation for composite structures, a virtually infinite class of multi-fidelity models can be generated with the same invariant FEM model and with a two-dimensional mesh. A list of the main features follows:

Any Higher Order Shear Deformation Theories with any expansion for the displacements can be obtained. Each displacement variable can be independently analyzed.

Any Zig-Zag Theories with any expansion for the displacements are possible.

Transverse strain effects are retained.

Any layerwise theory can be successfully adopted for a quasi-3D simulation but with a two-dimensional mesh and huge savings in computational time when compared with FE solid elements (3D mesh).

Multi-fidelity mixed Equivalent Single Layer (with or without Zig Zag effects) and Layerwise models are possible with the same software based upon the Generalized Unified Formulation. The continuity of the transverse stresses is automatically enforced a priori leading to high accuracy in the predictions of the displacement and stress fields.

The same model can be adopted to use an infinite multi-fidelity number of approaches. This saves a huge amount of time and cost: the mathematical FE model is prepared only once.

Generalized Unified Formulation for Composite Structures