Richard Critchley, Ilaria Corni, Julian A. Wharton, Frank C. Walsh, Robert J. K. Wood and Keith R. Stokes The Preparation of Auxetic Foams by Three-Dimensional Printing and Their Characteristics Advanced Engineering Materials 15
Repeatable auxetic foams are produced using three-dimensional printing technologies. This methodology is applied here for the first time to produce playable polymeric auxetic foams with an idealized re-entrant cellular structure. During uniaxial tensile stress, the foams show negative Poisson's ratios as low as −1.18. The experimental Poisson's ratios of the auxetic foams are compared against the data predicted by a three-dimensional mathematical model.
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