Large displacement models for composites based on Murakami's Zig-Zag Function, Green-Lagrange Strain Tensor, and Generalized Unified Formulation

Development of a finite element via Unified Formulation: Implementation as a User Element subroutine to predict stress profiles in composite plates

“…In the literature, it is possible to find a group of scientific contributions, which used UF in order to better predict the mechanical behavior of laminated composites. Among them, Santarpia and Demasi [16] applied Murakami's Zig-Zag Function combined to Green-Lagrange Strain, Second-Piola Kirchhoff Stress-tensors and GUF formulation for composite structures. Then, transverse strain effects could be considered and modeled, making their approach more adequate for thick structures.…”