.png){kind=icon}
.png){kind=icon}
Return
Hierarchical topology optimization with varying micro-structural aspect ratios
.png){kind=icon}
PRE
AI
DOI：10.1016/j.enganabound.2023.07.044.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
This paper proposes a novel isogeometric topology optimization method to obtain the hierarchical structures, where a special porous microstructures of identical topologies but with different length-width ratios are considered. First, the floating projection technique without penalization is adopted to find the topological configurations of hierachical structures, which make the optimized hierachical structures not easy to fall into the local optimums. Second, the isogeometric analysis based on the non-uniform rational B-spline basis functions, is utilized to calculate the structural compliances and sensitivity information. Third, this paper presents a limited number of microstructures with the changing aspect ratios, to satisfy arbitrary boundary conditions of macrostructures. The macroscopic equivalent properties are evaluated by the isogeometric analysis-based homogenization method. Finally, four numerical examples are provided to illustrate the effectiveness of the proposed method in designing hierarchical structures, and the influence of micro-structural properties on the macrostructural performances.
Keywords:
Hierachical design
Floating projection
Isogeometric analysis
Equivalent properties
Journal
IF:
4.1
Papers:
5.8K
Citations:
9.4K