| 摘要 |
System comprising a plurality of layers 350, 360 each comprising a strain sensitive material comprising one or more cells. The cells 351, 361 comprising re-entrant geometries designed to interlock with those of an adjacent layer such that on impact the protruding cells of one layer may move in to the recesses formed by cells of an adjacent layer. The cells in the layers may expand or contract to increase energy absorption of the movement. The system may include a tensile layer which may comprise fabric which may be integral to the material of the one or more cells in at least one of the layers. A system comprising a body, the body, made from a strain rate sensitive material comprises an outer cell 351 and an inner cell 352 retained within the outer cell by a web. The cells comprise overhangs at their openings and the overhang of the outer cell is different to that of the inner cell, at least one of the cells comprises a re-entrant geometry Also included is a method of producing the system. |
