Modelling and testing of 3D printed cellular structures under quasi-static and dynamic conditions

A procedure for characterizing the deformation process of regular cellular structures fabricated with Fused Deposition Modelling of ABSplus material is presented. Two different topologies with similar relative densities were experimentally compressed for five different deformation velocities: quasi static (1.0; 5.0 and 10.0 mm/s) and dynamic (1520.0 mm/s and 2400.0 mm/s). In addition, both topologies were compared in the case of energy absorption capabilities. Firstly, however, the mechanical properties of the 3D printed material samples were evaluated and numerically correlated with the experimental data different strain rates. For this purpose, an elasto-visco-plastic constitutive model was selected and the Cowper-Symonds hardening parameters were determined using the MATLAB authorial script, which finally resulted in a good agreement between the experimental and numerical outcomes for all the considered loading conditions.