Journal
COMPOSITE STRUCTURES
Volume 120, Issue -, Pages 41-52Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2014.09.064
Keywords
Bi-stable composites; Cross-ply; Snap process; Mechanical testing; Rayleigh-Ritz
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Bi-stable response of cross-ply composites is modelled when snap processes are trigged by a vertical force and the laminate is supported at four points. The model is based on the Rayleigh-Ritz technique. Non-linear von Karman strains, non-uniform curvatures and uniform through-the-thickness normal strain are included in the analysis. The analysis has been carried out step by step, by small increments of the applied load. Experiments in four [0/90](T), carbon/epoxy laminates have been carried out for comparison in a test configuration that fulfils the requirements of the model. The multi-event snap-through and intermediate equilibrium positions have been experimentally observed and recorded. The initial snap-through and snap-back load-displacement curves have been experimentally determined and compared to those corresponding to the proposed model. (C) 2014 Elsevier Ltd. All rights reserved.
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