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Concurrent design with connectable graded microstructures
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DOI：10.1016/j.cma.2016.12.007.png)
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摘要
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This paper proposes a novel multiscale concurrent design method to provide insight into the optimal structural design based on microarchitectures, where both the spatiallyvarying microstructural configurations and their macroscopic distribution are optimized in an integrated manner. A shape metamorphosis technology is developed to interpolate a prototype microstructure (PM) to generate a family of graded microstructures (GMs) that are connectable to each other in a natural way since they present similar topological features and material distribution patterns at their edges. The concurrent design optimizes configuration of the PM at the microscopic level and coordinates the compatible generated GMs at the macroscopic level in a doubleloop manner, which ensures a sufficiently large design space. Numerical examples demonstrate that, compared to the onescale design strategy, i.e. the macrostructure topology optimization and the homogeneous microstructure design method, the proposed approach is able to produce remarkably improved optimized solutions. Furthermore, the obtained structures show good manufacturability to which the additive manufacturing technology is applicable without extensive postmodification. (C) 2016 Elsevier B.V. All rights reserved.
Keyword:
Topology optimization
Concurrent design
Connectable microstructure
Graded microstructure
Shape interpolation
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期刊
IF:
7.3
论文数:
1.3W
被引数:
5.6W
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Topology optimisation of manufacturable microstructural details without length scale separation using a spectral coarse basis preconditioner使用光谱粗基预处理器在没有长度尺度分离的情况下对可制造的微观结构细节进行拓扑优化
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