Multi-Scale Structural Topology Optimization

Material Property Mapping Representation

Initial Design

Intermediate Design

Evolution

Wrapping Shell Structure

Infill Structure

Final Design

Multi-Scale Structure

1. Multi-Scale Shell-Infill Structural Topology Optimization with Given Material Property

Multi-Material Negative Passion's Ratio Structure

Conventional

Representation

Shell-Infill

Representation

2. Concurrent Multi-Scale Shell-Infill Structural Topology Optimization

Optimization Flow Chart:

· Based on the regularization effect of the level set function, the shape of the level set function is mapped to different given material properties.

· The different given material properties are evaluated through the Finite Element Analysis and the design is updated to reach the final optimal layout.

· The following example is based on a negative Poisson's ratio structure with soft infill material  (green) and hard shell material (blue) .

· The overall structure topology and the infill material property are determined simultaneously in the optimization.

· A user-oriented distance regularization energy functional can be formulated toward the user interests.

· An isotropic constraint is included in the designing of the infill structure to ensure the future validity of the 

Optimization of Macroscale Structure and Infill Material Property:

Optimization of Infill Structural Layout:

Multi-Control-Point Conformal Mapping:

3D Printed Shell-Infill Multiscale Structure:

Representative publications:

Conference:

Long Jiang, Shikui Chen and Peng Wei. "Concurrent Optimization of Structure Topology and Infill Properties with a Cardinal-Function-Based Parametric Level Set Method." ASME Proceedings of IDETC/CIE, August 26-29, 2018, Quebec City, Canada.

Journal:

Long Jiang, Yang Guo, Shikui Chen, Peng Wei, Na Lei, Xianfeng Gu, "Concurrent optimization of structural topology and infill properties with a CBF-based level set method". Frontiers of Mechanical Engineering. https://doi.org/10.1007/s11465-019-0530-5