An article is provided that includes a core with a plurality of plates. A first one of the plurality of plates is hingedly attached, at one or more edges of the first plate, to one or more substantially adjacent other plates in the plurality of plates. Each hinge that hingedly attaches an edge of the first plate to another plate joins less than the entire respective hingedly attached edge to a corresponding one of the one or more substantially adjacent other plates and is integrally connected to the first plate.