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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Design for Mechanical Behavior of Architectured Materials via Topology Optimization
Presentation Title Inverse Homogenization Design of Micro-truss Architected Materials Using Geometric Primitives
Author(s) Seth Watts, Wen Chen, Julie Jackson, William Smith, Christopher Spadaccini, Daniel Tortorelli
On-Site Speaker (Planned) Seth Watts
Abstract Scope 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.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Level Set Based Topology Optimization Framework to Design Extreme Thermos-elastic Microstructure: Influence of Graded Interfaces and Multi-materials
A Panel Discussion for the Design of Materials via Topology Optimization
Deformation and Failure of Bioinspired Segmented Architectured Beams and Plates
Dense Architectured Materials in Engineering and in Nature
Design for Discovery: Integrated Computational Design & Additive Manufacturing of Mechanical Metastructures with a Parametric Level-set Based Approach
Design of Functionally Graded Microstructures with Manufacturability
Design of Honeycomb TWIP Steels for Maximum Energy Absorption
Designing Metamaterials for Enhanced Noise and Vibration Properties
Discrete-element Modeling of Nacre-like Materials: Random Microstructures, Nonlinear Deformations and Fracture
Efficient Microstructural Design: A Topological Sensitivity Approach
Extreme Design: An Adrenalin Rush with Topology Optimization, Metamaterials and Additive Manufacturing
Incorporating Material Heterogeneity in Automated Design Tools
Inverse Homogenization Design of Micro-truss Architected Materials Using Geometric Primitives
Mechanical Properties of Work Hardened Steel Multilayers with Bimodal Grain Size
Multiscale Design with Architected Material Connectivity for Multiphysics Problems
Optimal Design of Architected Materials with Extreme Energy Dissipation
Optimized Microlattices for High Strength and Impact Attenuation
Realizing Optimized Mesoscale 3D Architected Material Designs via Nanoparticle Assembly by Pointwise Spatial Printing
Tailoring the Dynamic Properties of 3D Woven Metallic Lattices through Topology Optimization
Topology Optimization for Sliding Abrasive Wear of Bi-material Composites
Topology Optimization of Architected Materials with Application-specific Tailored Properties
Topology Optimization of Cellular Materials with Tailored Band Gaps
Topology Optimization of Multi-material Truss Lattice Structures via Geometry Projection
Topology Optimization with RVE Lattice Structures Subject to Additive Manufacturing and Stress Design Constraints

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