Importance

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Abstract

An impactor for a movable, deformable barrier, simulating an automobile, comprising an upright, solid backing support, a plurality of energy absorbing impact segments protruding from the support, each segment having an outer impact face and each comprising a plurality of layers of honeycomb having different crush strength characterized by increasing crush strength of successive layers from the outer impact face to the support, the layers being separated by and secured to perforate plates therebetween allowing air flow from a crushing layer to the succeeding layers when the layers are successively crushed and each impact segment having a thin vent layer of noncrushing slotted honeycomb adjacent the support for discharge of air from all of the segments as they are successively crushed. The layers in each segment are of essentially the same width and height. A solid face sheet is at said outer impact face of said segments. The vent layer has laterally vented honeycomb cells having a crush strength greater than the anticipated impact load. The layers in each segment, except for the vent layer, are individually precrushed sufficient to eliminate the initial compression load spike.

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First Claim