| Abstract Scope |
This presentation demonstrates that simultaneously considering the effects of topology and microstructure on the mechanical behavior of AMLS has the potential to substantially improve key performance metrics, e.g., energy dissipation, and to avoid widely reported drastic strength drop of AMLS at the onset of yielding instead, an ever-hardening response is achieved. The distinguishing feature of our approach is that the topological optimization is performed while accounting for the heterogeneous distribution of strut-level microstructural features and concomitant mechanical behavior, which leads to new insights relative to peak AMLS structural performance. A new set of new topologies are designed, built, and validated against experiments. The new topologies demonstrate over 50% improvement on average in energy absorption capacity and flow stress of topologies that had been previously optimized using a homogeneous constitutive model throughout the unit cell. |