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Structural topology optimization for directional deformation behavior design with the orthotropic artificial weak element method

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Abstract

In this paper, the topology optimization method is extended to arrive at the desired deformation behavior within local structural domains by distinguishing and suppressing specific deformation in a certain direction. Compared to the standard topology optimization and existing shape preserving design method, the contribution of this paper is twofold. First, Artificial Weak Elements (AWE) are defined and attached to the appropriate local domain. The strain energies of the AWE are calculated as a measurement to describe the deformation behavior quantitatively. Second, particular orthotropic material properties are defined for the AWE according to the given direction of the desired deformation, which formulate Orthotropic Artificial Weak Elements (AWEort). By introducing the constraint on the strain energy of the AWEort into a standard compliance based topology optimization, the deformation in the corresponding direction is suppressed, resulting in the desired deformation behavior. Several numerical examples are tested and compared to the standard topological design to illustrate the effect of the directional deformation behavior design.

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Acknowledgments

This work is supported by National Natural Science Foundation of China (11432011, 11620101002), National Key Research and Development Program (2017YFB1102800), Key Research and Development Program of Shaanxi (S2017-ZDYF-ZDXM-GY-0035).

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Authors and Affiliations

  1. State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xian, Shaanxi, 710072, China

    Yu Li, Ji Hong Zhu, Wei Hong Zhang & Lin Wang

  2. MIIT Lab of Metal Additive Manufacturing and Innovative Design, Northwestern Polytechnical University, Xian, Shaanxi, 710072, China

    Ji Hong Zhu

  3. Institute of Intelligence Material and Structure, Unmanned System Technologies, Northwestern Polytechnical University, Xian, Shaanxi, 710072, China

    Ji Hong Zhu

Authors
  1. Yu Li
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  2. Ji Hong Zhu
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  3. Wei Hong Zhang
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  4. Lin Wang
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Correspondence to Ji Hong Zhu or Wei Hong Zhang.

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Li, Y., Zhu, J.H., Zhang, W.H. et al. Structural topology optimization for directional deformation behavior design with the orthotropic artificial weak element method. Struct Multidisc Optim 57, 1251–1266 (2018). https://doi.org/10.1007/s00158-017-1808-z

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  • DOI: https://doi.org/10.1007/s00158-017-1808-z

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