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One of the common architectures in natural materials is the helicoidal (Bouligand) structure, where fiber layers twist around a helical screw. Despite the many studies that have shown the existence of Bouligand structures, methods for nanoscale structural characterization and identification of fiber mechanical properties remain to be developed. In this study, we used the exocuticle of Cotinis mutabilis...
Horacio D. Espinosa and co‐workers present a nanoscale experimental – theoretical methodology to reveal the hierarchical structure and properties of the exoskeleton of arthropods in article number 1603993. As a case study, they characterize the helicoidal fiber structure present in the beetle's elytra and identify the fiber anisotropic elastic constants.
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