Shock attenuation device with stacked nonviscoelastic layers
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United States of America Patent
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Dec 5, 2017
Grant Date -
Apr 27, 2017
app pub date -
Oct 21, 2015
filing date -
Oct 21, 2015
priority date (Note) -
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Abstract
A shock attenuation device is used to reduce the effect of a blast shock by both disrupting the propagation of the shock and by spreading, deflecting, and/or redirecting the shock. The device includes multiple layers of different materials, having different shock transmission impedances, stacked in a direction in which the blast shock travels through the device. At least one of the layers includes a material that crumples in response to the shock, undergoing an inelastic deformation in response to the shock. Also, at least one of the layers includes a material that has a directional shock transmission impedance that provides different shock transmission impedance within different directions within the material. The directional shock transmission material may be oriented such that the preferred direction of shock transmission within the material is oriented away from the direction of in which the multiple layers of material are stacked.
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