Speaker
Description
Cellular materials, with their unique combination of lightweight, high strength, and good deformability, are promising for engineering applications. They may initially be divided into irregular structures and regularly repeating arrangements. Both categories can be open-celled or closed-celled. This contribution investigates the energy-absorbing properties of foamy and lattice-like structures with defined volume fractions in static and dynamic compression experiments. The specimens are manufactured by SLA printing of viscoelastic polymeric material. The structures areloaded in a tension test machine and by using a Split-Hopkinson pressure bar with a modified setup. From the measured strains, we can calculate how much of the applied energy was absorbed by the different structures. We then deduce a mass specific energy absorbtion. The choice of material implies that the lattice structures can withstand multiple loads and return to their original state after some recovery, cf. [1, 2]. Additionally, we present finite element simulations of our experiments and discuss how far these calculations are able to predict the different material responses.
[1] S. Bieler, K. Weinberg: Energy absorption of sustainable lattice structures under static compression. arXiv:2412.06493 [physics.app-ph]
[2] S. Bieler, K. Weinberg. Energy absorption of sustainable lattice structures under impact loading. arXiv:2412.06547 [physics.app-ph]
