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Measured Poisson’s ratio as a function of true strain for the (A) single-layer and (B) double-layer constructs composed of the reentrant, missing-rib, and intact-rib unit-cell geometries. Three strain-dependent experiments were performed for each type of single-layer construct and two strain-dependent experiments were performed for each double-layer construct; each strain test was conducted with a different construct. Separate experiments are denoted by color in the plots.
