Patent ID: 9056983
Filing Date: 2015-06-16
Classification: A43B,A63B,B29C,B29L,C08K,C08L

Abstract:
1. A composite material for protection of an object from a blast or shock wave, comprising: an impact absorbing material including a plurality of regions, each said region formed as a solid matrix within which stress-concentrating features are dispersed, including: a plurality of first features dispersed within a first region, and having a first average characteristic dimension of between about ten microns and about two hundred microns; a plurality of second features dispersed within a second region, and having a second average characteristic dimension that is at least about one order of magnitude larger than said first average characteristic dimension; and a plurality of third features dispersed within a third region, and having a third average characteristic dimension that is at least about one order of magnitude larger than said second average characteristic dimension; wherein the material proximate to said first, second, and third features progressively buckles upon application of a load, such that material proximate said third features tends to deform before the deformation of material proximate to said second and first features, and material proximate said first features tends to deform after the deformation of material proximate to said second and third features, and wherein features belonging to any one of said first, second, or third features are filled with a fluid other than air.