| 摘要 |
<p>A core of sandwich structural material comprising an assembly of several sheets comprising a first sheet and a second sheet that are provided on one of the faces thereof with of periodically distributed polygonal-based pyramid frustums, the superposition of these sheets in the thickness direction forming a three-dimensional network of hollow tubular channels which extend from one face of one sheet to one face of another sheet along a channel direction, and that are each defined by a peripheral wall, this peripheral wall being provided both by the first sheet and by the second sheet.</p> |
