Strong compared to what? Durable compared to what? Not compared to aluminum, carbon or kevlar honeycombs. Regardless the primary function of core in a composite structure is to support the distance between the laminates. The core is not there to make the composite strong.Uh, cardboard can be both flexible and strong until water gets involved.. Alot like my electrical engineering expertise; I may not know much but I know water let's the smoke out and that isn't good.
Tom
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