|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Design for Mechanical Behavior of Architectured Materials via Topology Optimization
||Inverse Homogenization Design of Micro-truss Architected Materials Using Geometric Primitives
||Seth Watts, Wen Chen, Julie Jackson, William Smith, Christopher Spadaccini, Daniel Tortorelli
|On-Site Speaker (Planned)
Micro-truss architected materials can be more efficient at retaining stiffness than stochastic microstructures as the material volume fraction is lowered, leading to high specific stiffness. Additionally, the open topology and low volume fraction of such designs permit easy and rapid additive manufacturing when compared to more complex architectures.
In contrast with earlier work using ground structures or heuristic approaches, we design these architectures by inverse homogenization of a continuum unit cell. We preserve the micro-truss morphology by parameterizing the topology optimization using cylindrical geometric primitives projected into the finite element analysis domain. More complex geometric primitives are also possible.
We discuss our numerical approach and provide examples of design for high specific stiffness, benchmarked against the octet truss, whose stiffness we exceed over a range of orientations. We also report on validation of our results by mechanical testing of additively manufactured lattices at multiple volume fractions.
||Planned: Supplemental Proceedings volume