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A novel light metal cellular structure has been designed and fabricated from assemblies of square cross section tubes oriented in a cross-ply 2D and orthogonal 3D arrangements tailored to support different combinations of through thickness and in-plane loads. A simple dip brazing approach is used to fabricate these structures from extruded 6061-T6 aluminum alloy tubes. By varying the tube wall thickness, the resulting 3D cellular structures had relative densities between 11 and 43%. Using a combination of experimental testing and finite element simulation of the through thickness compression, it was found that the 3D orthogonal structures have an approximately linear dependence of modulus upon relative density. However their strength had a power law dependence upon density with an exponent of approximately 5/3. These cellular structures exhibit almost ideal plastic energy absorption at pressures that could be selected by adjustment of the vertical and in-plane tube wall thicknesses. The dynamic compressive response of the 3D cellular structure, and the 2D [0o/90o]2 array and out-of-plane tubes from which they were constructed, have also been

Impulse Loading of 3D Prismatic Cellular Structures