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Design of optimized architected structures with exact size and connectivity via an enhanced multidomain topology optimization strategy

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Abstract

With the rapid developments of modern fabrication techniques, architected structures are increasingly used in many application areas, e.g., lightweight structures, heat exchangers, energy absorption components, aircraft engines, etc. To systematically design optimized architected structures with favorable manufacturability in terms of exact sizes and good connectivity, in the present work, an enhanced multidomain topology optimization method is developed. The design domain is divided into several subdomains and boundary layers between them first. Periodic base cells with exact sizes are distributed in each subdomain, and analyzed and optimized approximately based on the homogenization method with coarse meshes to reduce the numerical efforts. Besides, gradient boundary layers discretized by fine meshes are optimized between subdomains and boundaries to connect adjacent base cells with different patterns and address the boundary effect. Quadtree technology is used to match the meshes of different sizes. Numerical examples verify both the effectiveness and efficiency of the proposed approach for designing manufacturable optimized architected structures.

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Acknowledgements

The financial supports from the National Natural Science Foundation (11821202, 11732004, 12002077, 12002073), the National Key Research and Development Plan (2016YFB0201601), China Postdoctoral Science Foundation funded project (2020T130078, 2020M680944), Starting Grants at Dalian University of Technology (DUT20RC(3)020), Program for Changjiang Scholars, Innovative Research Team in University (PCSIRT) and 111 Project (B14013) are also gratefully acknowledged.

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Authors and Affiliations

  1. State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, International Research Center for Computational Mechanics, Dalian University of Technology, Dalian, 116023, People’s Republic of China

    Chang Liu, Zongliang Du, Weisheng Zhang, Yue Mei & Xu Guo

  2. Beijing Institute of Spacecraft System Engineering, CAST, Beijing, People’s Republic of China

    Xiaoyu Zhang

  3. Ningbo Institute of Dalian University of Technology, Ningbo, 315016, People’s Republic of China

    Chang Liu, Zongliang Du, Weisheng Zhang, Yue Mei & Xu Guo

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  1. Chang Liu
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  2. Zongliang Du
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  3. Weisheng Zhang
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  4. Xiaoyu Zhang
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  5. Yue Mei
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  6. Xu Guo
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Correspondence to Zongliang Du or Xu Guo.

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Liu, C., Du, Z., Zhang, W. et al. Design of optimized architected structures with exact size and connectivity via an enhanced multidomain topology optimization strategy. Comput Mech 67, 743–762 (2021). https://doi.org/10.1007/s00466-020-01961-8

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