A jigsaw puzzle metamaterial concept. (15th October 2018)

• Record Type: Journal Article
• Authors: Nežerka, V.; Somr, M.; Janda, T.; Vorel, J.; Doškář, M.; Antoš, J.; Zeman, J.; Novák, J.
• Is Part Of: Composite structures. Volume 202(2018)
• Page Start: 1275
• Page End: 1279
• Publication Date: 2018-10-15
• Subjects: Modular metamaterial -- Auxetic behavior -- Additive manufacturing -- Customized assembly -- Digital image correlation; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2018.06.015
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: A concept of a planar modular mechanical metamaterial inspired by the principle of local adaptivity is proposed. The metamaterial consists of identical pieces similar to jigsaw puzzle tiles. Their rotation within assembly provides a substantial flexibility in terms of structural behavior, whereas mechanical interlocks enable reassembly. The tile design with a diagonal elliptical opening allows us to vary elastic properties from stiff to compliant, with positive, zero, or negative Poisson's ratio. The outcomes of experimental testing on additively manufactured specimens confirm that the assembly properties can be accurately designed using optimization approaches with finite element analysis at heart.