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FROM:
G.R. Kress and D.T. Filipovic (Laboratory of Composite Materials and Adaptive Structures, Department of Mechanical and Process Engineering, ETH Zürich, Tannenstr. 3, CH-8092 Zürich, Switzerland),
“An analytical nonlinear morphing model for corrugated laminates”, Curved and Layered Structures, Vol 6, pp 57-67, 2019, https://doi.org/10.1515/cls- 2019- 0005
ABSTRACT: This paper contributes an analytical nonlinear morphing model for high-amplitude corrugated thin-walled laminates of arbitrary stack-up with a corrugation shape composed of circular sections. The model describes large deformations, the nonlinear relation between line force and global stretch, and the distribution of local line loads. The quarter-unit-cell approach together with assuming small material strains and a plane strain situation contribute to the model’s simplicity. It is explained how the solution procedure minimizes the force and moment residual of the equilibrium of cutting and reaction line loads by using Newton’s optimization method. Deformation results are verifed by comparison with FEM simulation. The effects of laminate design and corrugation amplitude on deformations, line-force-stretch diagrams, and bending-curvature-stretch diagrams are presented and discussed.
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