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Concurrent Design with Connectable Graded Microstructures

Authors Wang, Yiqiang HKUST affiliated (currently or previously).
Chen, Feifei
Wang, Michael Yu View this author's profile
Issue Date 2017
Source Computer Methods in Applied Mechanics and Engineering , v. 317, April 2017, p. 84-101
Summary This paper proposes a novel multiscale concurrent design method to provide insight into the optimal structural design based on micro-architectures, where both the spatially-varying 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 double-loop manner, which ensures a sufficiently large design space. Numerical examples demonstrate that, compared to the one-scale 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 post-modification. © 2016 Elsevier B.V.
ISSN 0045-7825
Language English
Format Article
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