An orthotropic 3D re-entrant honeycomb structure that exhibits a negative Poisson’s ratio
was designed and fabricated via the electron beam melting (EBM) process. The modeling work
established the relationships between various structural parameters and the mechanical properties
of the auxetic structures. Compressive tests were performed on the re-entrant honeycomb
samples made with Ti6Al4V as well as pure copper. Results of the strength, modulus and energy
absorption for the two materials were compared with the theoretical models in order to verify the
theoretical predictions.Mechanical Engineerin
